Date: 27/07/2016 11:57:06
From: Cymek
ID: 930845
Subject: Atmospheric Scrubbers

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

Reply Quote

Date: 27/07/2016 11:57:54
From: dv
ID: 930847
Subject: re: Atmospheric Scrubbers

Cymek said:


Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

Yes. Though they need not be enormous. They could merely be very numerous.

Reply Quote

Date: 27/07/2016 11:59:55
From: AwesomeO
ID: 930849
Subject: re: Atmospheric Scrubbers

Some of the car manufacturers claim that air coming out of the exhaust is cleaner than the air going in.

Reply Quote

Date: 27/07/2016 12:01:14
From: diddly-squat
ID: 930850
Subject: re: Atmospheric Scrubbers

Cymek said:


Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

The physical chemistry is simple enough and the engineering capability is available… the only issues are scale (given the low concentration of atmospheric CO2) and cost.

Reply Quote

Date: 27/07/2016 12:01:27
From: Cymek
ID: 930851
Subject: re: Atmospheric Scrubbers

dv said:


Cymek said:

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

Yes. Though they need not be enormous. They could merely be very numerous.

That as well

Reply Quote

Date: 27/07/2016 12:02:39
From: dv
ID: 930853
Subject: re: Atmospheric Scrubbers

AwesomeO said:


Some of the car manufacturers claim that air coming out of the exhaust is cleaner than the air going in.

Those car manufacturers say the darnedest things.

Reply Quote

Date: 27/07/2016 12:03:56
From: The Rev Dodgson
ID: 930855
Subject: re: Atmospheric Scrubbers

diddly-squat said:


Cymek said:

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

The physical chemistry is simple enough and the engineering capability is available… the only issues are scale (given the low concentration of atmospheric CO2) and cost.

And source of the energy to remove the CO2, without emitting more CO2 than you remove.

Reply Quote

Date: 27/07/2016 12:05:56
From: diddly-squat
ID: 930858
Subject: re: Atmospheric Scrubbers

The Rev Dodgson said:


diddly-squat said:

Cymek said:

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

The physical chemistry is simple enough and the engineering capability is available… the only issues are scale (given the low concentration of atmospheric CO2) and cost.

And source of the energy to remove the CO2, without emitting more CO2 than you remove.

damn you all and your low carbon utopian future…

Reply Quote

Date: 27/07/2016 12:06:03
From: dv
ID: 930859
Subject: re: Atmospheric Scrubbers

The Rev Dodgson said:


diddly-squat said:

Cymek said:

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

The physical chemistry is simple enough and the engineering capability is available… the only issues are scale (given the low concentration of atmospheric CO2) and cost.

And source of the energy to remove the CO2, without emitting more CO2 than you remove.

Too easy.

Reply Quote

Date: 27/07/2016 12:07:29
From: Postpocelipse
ID: 930862
Subject: re: Atmospheric Scrubbers

Patches of the Siberian plains are developing trampoline like qualities as CO2 and methane thaws. Sites like these might be as important to address. The task is formidable but can be achieved provided a coordinated effort. All the telescope construction that has been occurring is not dissimilar in logistics and cost I would reason.

Reply Quote

Date: 27/07/2016 12:08:16
From: dv
ID: 930863
Subject: re: Atmospheric Scrubbers

Can we use these trampolines to our advantage?

Reply Quote

Date: 27/07/2016 12:08:18
From: diddly-squat
ID: 930864
Subject: re: Atmospheric Scrubbers

dv said:


The Rev Dodgson said:

diddly-squat said:

The physical chemistry is simple enough and the engineering capability is available… the only issues are scale (given the low concentration of atmospheric CO2) and cost.

And source of the energy to remove the CO2, without emitting more CO2 than you remove.

Too easy.

less easy when you consider the full life cycle carbon cost, but on an operating basis, I agree it’s easy enough…

Reply Quote

Date: 27/07/2016 12:09:40
From: Postpocelipse
ID: 930865
Subject: re: Atmospheric Scrubbers

dv said:


Can we use these trampolines to our advantage?

With the aid of Cirque du Soleil

Reply Quote

Date: 27/07/2016 12:11:29
From: dv
ID: 930868
Subject: re: Atmospheric Scrubbers

diddly-squat said:


dv said:

The Rev Dodgson said:

And source of the energy to remove the CO2, without emitting more CO2 than you remove.

Too easy.

less easy when you consider the full life cycle carbon cost, but on an operating basis, I agree it’s easy enough…

Come on …

I mean eventually, all power generation on earth will be non-emitting, and the next generation of equipment built after that will have zero full life cycle carbon cost. I don’t know whether that will be in fifty years or five thousand years but it will necessarily occur.

Reply Quote

Date: 27/07/2016 12:12:04
From: The Rev Dodgson
ID: 930869
Subject: re: Atmospheric Scrubbers

Postpocelipse said:


Patches of the Siberian plains are developing trampoline like qualities as CO2 and methane thaws. Sites like these might be as important to address. The task is formidable but can be achieved provided a coordinated effort. All the telescope construction that has been occurring is not dissimilar in logistics and cost I would reason.

I’m pretty sure that if you converted all the telescopes in the World into air scrubbers, they’d only make a tiny dent in pollution levels.

Reply Quote

Date: 27/07/2016 12:13:28
From: The Rev Dodgson
ID: 930872
Subject: re: Atmospheric Scrubbers

dv said:


diddly-squat said:

dv said:

Too easy.

less easy when you consider the full life cycle carbon cost, but on an operating basis, I agree it’s easy enough…

Come on …

I mean eventually, all power generation on earth will be non-emitting, and the next generation of equipment built after that will have zero full life cycle carbon cost. I don’t know whether that will be in fifty years or five thousand years but it will necessarily occur.

Unless the species responsible for all the emissions dies out first.

Reply Quote

Date: 27/07/2016 12:14:41
From: dv
ID: 930873
Subject: re: Atmospheric Scrubbers

The Rev Dodgson said:


dv said:

diddly-squat said:

less easy when you consider the full life cycle carbon cost, but on an operating basis, I agree it’s easy enough…

Come on …

I mean eventually, all power generation on earth will be non-emitting, and the next generation of equipment built after that will have zero full life cycle carbon cost. I don’t know whether that will be in fifty years or five thousand years but it will necessarily occur.

Unless the species responsible for all the emissions dies out first.

The cow?

Reply Quote

Date: 27/07/2016 12:15:13
From: Cymek
ID: 930874
Subject: re: Atmospheric Scrubbers

So how would they work ?

Reply Quote

Date: 27/07/2016 12:15:23
From: Postpocelipse
ID: 930875
Subject: re: Atmospheric Scrubbers

The Rev Dodgson said:


Postpocelipse said:

Patches of the Siberian plains are developing trampoline like qualities as CO2 and methane thaws. Sites like these might be as important to address. The task is formidable but can be achieved provided a coordinated effort. All the telescope construction that has been occurring is not dissimilar in logistics and cost I would reason.

I’m pretty sure that if you converted all the telescopes in the World into air scrubbers, they’d only make a tiny dent in pollution levels.

I couldn’t see an initiative beginning with a greater budget before escalation of a program. System check requirements etc.?

Reply Quote

Date: 27/07/2016 12:19:35
From: Postpocelipse
ID: 930877
Subject: re: Atmospheric Scrubbers

Cymek said:


So how would they work ?

eg, If the Siberian plains are going to be thawing for some time maybe establish some form of irrigation canal system and grow forest where there wasn’t. Not all options have to be high tech.

Reply Quote

Date: 27/07/2016 12:29:33
From: dv
ID: 930882
Subject: re: Atmospheric Scrubbers

Cymek said:


So how would they work ?

Obv, different mechanisms would be required for different pollutants. The most important one is CO2, for GH effect purposes.

There are plenty of these machines already in existence. People have been working on this since late in the 20th century. The basic chemistry has been known since WW1 at least so the problem is in making it efficient and less expensive.

http://reneweconomy.com.au/2015/blue-crude-audi-pilot-produces-diesel-fuel-from-co2-and-water-66638
The Audi blue crude stream uses renewable energy to electrolyse water, extracts CO2 from the atmosphere and reacts the hydrogen and CO2 to make hydrocarbons.

http://www.sciencealert.com/a-canadian-start-up-is-removing-co2-from-the-air-and-turning-it-into-pellets
This Canadian scheme instead stores the CO2 as carbonate.

These schemes are both focused on sucking up CO2 into a reduced form that can be later used as fuel, but if we want to permanently reduce the CO2 levels, we don’t want them to be a “fuel”: we want to store them in a form that will be solid and stable for a long time, probably as graphite.

Of course this raises the question of what we are going to do with trillions of tonnes of graphite. Maybe we could use it as a building material.

—-

BTW for mine, I think that reforestation is an easy way to stick away unwanted carbon. Not instead of the high-tech method, but as well as.

Reply Quote

Date: 27/07/2016 12:30:22
From: dv
ID: 930883
Subject: re: Atmospheric Scrubbers

I think the telescope comparison is not appropriate. Telescope manufacture is not a major sector of the earth’s economy.

Reply Quote

Date: 27/07/2016 12:31:02
From: Cymek
ID: 930884
Subject: re: Atmospheric Scrubbers

dv said:


Cymek said:

So how would they work ?

Obv, different mechanisms would be required for different pollutants. The most important one is CO2, for GH effect purposes.

There are plenty of these machines already in existence. People have been working on this since late in the 20th century. The basic chemistry has been known since WW1 at least so the problem is in making it efficient and less expensive.

http://reneweconomy.com.au/2015/blue-crude-audi-pilot-produces-diesel-fuel-from-co2-and-water-66638
The Audi blue crude stream uses renewable energy to electrolyse water, extracts CO2 from the atmosphere and reacts the hydrogen and CO2 to make hydrocarbons.

http://www.sciencealert.com/a-canadian-start-up-is-removing-co2-from-the-air-and-turning-it-into-pellets
This Canadian scheme instead stores the CO2 as carbonate.

These schemes are both focused on sucking up CO2 into a reduced form that can be later used as fuel, but if we want to permanently reduce the CO2 levels, we don’t want them to be a “fuel”: we want to store them in a form that will be solid and stable for a long time, probably as graphite.

Of course this raises the question of what we are going to do with trillions of tonnes of graphite. Maybe we could use it as a building material.

—-

BTW for mine, I think that reforestation is an easy way to stick away unwanted carbon. Not instead of the high-tech method, but as well as.

Yes that obviously makes a lot of sense to do both.

Reply Quote

Date: 27/07/2016 12:31:36
From: Postpocelipse
ID: 930886
Subject: re: Atmospheric Scrubbers

dv said:

Of course this raises the question of what we are going to do with trillions of tonnes of graphite. Maybe we could use it as a building material.

—-

Spaceships!

Reply Quote

Date: 27/07/2016 12:33:23
From: Postpocelipse
ID: 930887
Subject: re: Atmospheric Scrubbers

dv said:


I think the telescope comparison is not appropriate. Telescope manufacture is not a major sector of the earth’s economy.

I also only stated ‘not dissimilar’. I could have used ‘bridge building’ for the euphemistic comparison…..

Reply Quote

Date: 27/07/2016 12:34:09
From: AwesomeO
ID: 930888
Subject: re: Atmospheric Scrubbers

dv said:


Cymek said:

So how would they work ?

Obv, different mechanisms would be required for different pollutants. The most important one is CO2, for GH effect purposes.

There are plenty of these machines already in existence. People have been working on this since late in the 20th century. The basic chemistry has been known since WW1 at least so the problem is in making it efficient and less expensive.

http://reneweconomy.com.au/2015/blue-crude-audi-pilot-produces-diesel-fuel-from-co2-and-water-66638
The Audi blue crude stream uses renewable energy to electrolyse water, extracts CO2 from the atmosphere and reacts the hydrogen and CO2 to make hydrocarbons.

http://www.sciencealert.com/a-canadian-start-up-is-removing-co2-from-the-air-and-turning-it-into-pellets
This Canadian scheme instead stores the CO2 as carbonate.

These schemes are both focused on sucking up CO2 into a reduced form that can be later used as fuel, but if we want to permanently reduce the CO2 levels, we don’t want them to be a “fuel”: we want to store them in a form that will be solid and stable for a long time, probably as graphite.

Of course this raises the question of what we are going to do with trillions of tonnes of graphite. Maybe we could use it as a building material.

—-

BTW for mine, I think that reforestation is an easy way to stick away unwanted carbon. Not instead of the high-tech method, but as well as.

GM bamboo, big as trees but fast growing.

Reply Quote

Date: 27/07/2016 12:35:17
From: mollwollfumble
ID: 930889
Subject: re: Atmospheric Scrubbers

Cymek said:


Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

Levels are already back down to prior to the industrial revolution, aren’t they? Let’s see.

Yes, certainly on a per capita basis.

“2,000 years ago, wood charcoal really took off. In AD 43-410, the Romans were coppicing on a truly grand scale. Wood charcoal was not only the fuel of choice at this time, but was also used in making tar for caulking and a thinner version is used in embalming. It was used in dyes, and as construction material in wet areas where rotting was an issue. During this period wood charcoal was also used in filtration and purification of liquids for the first time.”

Air pollution levels during this period of charcoal production were higher than they are now. Particularly soot levels. And that was before the industrial revolution. Wood fires pre-industrial revolution also contributed to the higher pollution levels then.

“Smoke from wood heaters and open fireplaces is a significant source of air pollution in autumn and winter months. When wood is burned, very small particles and gases are released into the atmosphere. These particles and gases are air pollutants. This pollution can affect air quality and impact on our health and quality of life. Woodsmoke pollution has a demonstrated impact on people’s health, especially those who have existing lung or heart conditions such as asthma or angina. Wood smoke can also affect people’s ability to enjoy their home and the outdoors. Complaints about wood smoke are among the most common complaints received by local government and EPA during winter.”

Reply Quote

Date: 27/07/2016 12:35:49
From: Postpocelipse
ID: 930891
Subject: re: Atmospheric Scrubbers

AwesomeO said:

GM bamboo, big as trees but fast growing.

The Pandas will approve.

Reply Quote

Date: 27/07/2016 12:38:21
From: Tamb
ID: 930892
Subject: re: Atmospheric Scrubbers

mollwollfumble said:


Cymek said:

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

Levels are already back down to prior to the industrial revolution, aren’t they? Let’s see.

Yes, certainly on a per capita basis.

“2,000 years ago, wood charcoal really took off. In AD 43-410, the Romans were coppicing on a truly grand scale. Wood charcoal was not only the fuel of choice at this time, but was also used in making tar for caulking and a thinner version is used in embalming. It was used in dyes, and as construction material in wet areas where rotting was an issue. During this period wood charcoal was also used in filtration and purification of liquids for the first time.”

Air pollution levels during this period of charcoal production were higher than they are now. Particularly soot levels. And that was before the industrial revolution. Wood fires pre-industrial revolution also contributed to the higher pollution levels then.

“Smoke from wood heaters and open fireplaces is a significant source of air pollution in autumn and winter months. When wood is burned, very small particles and gases are released into the atmosphere. These particles and gases are air pollutants. This pollution can affect air quality and impact on our health and quality of life. Woodsmoke pollution has a demonstrated impact on people’s health, especially those who have existing lung or heart conditions such as asthma or angina. Wood smoke can also affect people’s ability to enjoy their home and the outdoors. Complaints about wood smoke are among the most common complaints received by local government and EPA during winter.”


I think that bushfires contribute far more of those pollutants.
A couple of years ago we had a 10,000 hectare fire & that clouded the sky for weeks.

Reply Quote

Date: 27/07/2016 12:39:22
From: Postpocelipse
ID: 930893
Subject: re: Atmospheric Scrubbers

Postpocelipse said:


AwesomeO said:

GM bamboo, big as trees but fast growing.

The Pandas will approve.

Cannabis would probably grow well on the Siberian plains. :)

Reply Quote

Date: 27/07/2016 12:39:52
From: dv
ID: 930895
Subject: re: Atmospheric Scrubbers

mollwollfumble said:


Cymek said:

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

Levels are already back down to prior to the industrial revolution, aren’t they?

lolno

Reply Quote

Date: 27/07/2016 12:44:02
From: dv
ID: 930899
Subject: re: Atmospheric Scrubbers

Postpocelipse said:


Postpocelipse said:

AwesomeO said:

GM bamboo, big as trees but fast growing.

The Pandas will approve.

Cannabis would probably grow well on the Siberian plains. :)

Unfortunately people tend to burn cannabis…

Reply Quote

Date: 27/07/2016 12:46:29
From: Cymek
ID: 930900
Subject: re: Atmospheric Scrubbers

Ok instead of prior to the industrial revolution prior to humans appearing on the scene and altering the environment.
Pollution in general isn’t good for our health so having an almost pristine atmosphere can only be an advantage.
If we went clean immediately how long before all the pollution we’ve added would be recycled by the Earth itself, decades or centuries

Reply Quote

Date: 27/07/2016 12:50:02
From: Tamb
ID: 930902
Subject: re: Atmospheric Scrubbers

Cymek said:


Ok instead of prior to the industrial revolution prior to humans appearing on the scene and altering the environment.
Pollution in general isn’t good for our health so having an almost pristine atmosphere can only be an advantage.
If we went clean immediately how long before all the pollution we’ve added would be recycled by the Earth itself, decades or centuries

7 billion people & increasing. I don’t think it could ever happen. We cannot become totally clean.

Reply Quote

Date: 27/07/2016 12:51:16
From: dv
ID: 930903
Subject: re: Atmospheric Scrubbers

It’s kind of a bogus concept. The earth is not “pristine” and never was. It is literally covered in filth.

Reply Quote

Date: 27/07/2016 12:54:46
From: Tamb
ID: 930904
Subject: re: Atmospheric Scrubbers

dv said:


It’s kind of a bogus concept. The earth is not “pristine” and never was. It is literally covered in filth.

Pre major human influence there were worldwide bushfires on an enormous scale. Almost nothing within their boundaries survived.
These fires put enormous quantities of CO2 into the air.

Reply Quote

Date: 27/07/2016 12:56:21
From: dv
ID: 930906
Subject: re: Atmospheric Scrubbers

I should say that my “trillions of tonnes of graphite” line is exaggerative.

There are about 900 billion tonnes of CO2 in the atmosphere than there were before the industrial revolution. So that would work out to more like 250 billion tonnes of graphite, not trillions.

Reply Quote

Date: 27/07/2016 12:58:18
From: dv
ID: 930907
Subject: re: Atmospheric Scrubbers

Tamb said:


dv said:

It’s kind of a bogus concept. The earth is not “pristine” and never was. It is literally covered in filth.

Pre major human influence there were worldwide bushfires on an enormous scale. Almost nothing within their boundaries survived.
These fires put enormous quantities of CO2 into the air.

Right, and previously non-human events had put enormous quantities of CO2 into the air.

Humans are just part of life on earth. There wasn’t some “pristine” pre-human world to which to return, any more than we can return to a pristine pre-dinosaur world.

Reply Quote

Date: 27/07/2016 13:05:29
From: Cymek
ID: 930911
Subject: re: Atmospheric Scrubbers

dv said:


Tamb said:

dv said:

It’s kind of a bogus concept. The earth is not “pristine” and never was. It is literally covered in filth.

Pre major human influence there were worldwide bushfires on an enormous scale. Almost nothing within their boundaries survived.
These fires put enormous quantities of CO2 into the air.

Right, and previously non-human events had put enormous quantities of CO2 into the air.

Humans are just part of life on earth. There wasn’t some “pristine” pre-human world to which to return, any more than we can return to a pristine pre-dinosaur world.

Fair enough point

Reply Quote

Date: 27/07/2016 13:12:15
From: The Rev Dodgson
ID: 930912
Subject: re: Atmospheric Scrubbers

mollwollfumble said:


Cymek said:

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

Levels are already back down to prior to the industrial revolution, aren’t they? Let’s see.

Yes, certainly on a per capita basis.

“2,000 years ago, wood charcoal really took off. In AD 43-410, the Romans were coppicing on a truly grand scale. Wood charcoal was not only the fuel of choice at this time, but was also used in making tar for caulking and a thinner version is used in embalming. It was used in dyes, and as construction material in wet areas where rotting was an issue. During this period wood charcoal was also used in filtration and purification of liquids for the first time.”

Air pollution levels during this period of charcoal production were higher than they are now. Particularly soot levels. And that was before the industrial revolution. Wood fires pre-industrial revolution also contributed to the higher pollution levels then.

“Smoke from wood heaters and open fireplaces is a significant source of air pollution in autumn and winter months. When wood is burned, very small particles and gases are released into the atmosphere. These particles and gases are air pollutants. This pollution can affect air quality and impact on our health and quality of life. Woodsmoke pollution has a demonstrated impact on people’s health, especially those who have existing lung or heart conditions such as asthma or angina. Wood smoke can also affect people’s ability to enjoy their home and the outdoors. Complaints about wood smoke are among the most common complaints received by local government and EPA during winter.”

I presume they are neglecting CO2 as a pollutant.

It may be true that air pollution (excluding CO2) in central Rome is now less than it was 2000 years ago (although without an accurate measure of pollution then, we can’t be sure), but I doubt that pollution in central Peking is less than it was 2000 years ago.

Reply Quote

Date: 27/07/2016 13:18:44
From: diddly-squat
ID: 930913
Subject: re: Atmospheric Scrubbers

dv said:


diddly-squat said:

dv said:

Too easy.

less easy when you consider the full life cycle carbon cost, but on an operating basis, I agree it’s easy enough…

Come on …

I mean eventually, all power generation on earth will be non-emitting, and the next generation of equipment built after that will have zero full life cycle carbon cost. I don’t know whether that will be in fifty years or five thousand years but it will necessarily occur.

I agree, it’s incredibly difficult to say when that transition will occur… if we nail fusion tomorrow then I’d say we’d be on our way to a carbon free energy future within a decade but if we’re stuck with crummy solar and the like it will take a lot longer…

Reply Quote

Date: 27/07/2016 13:19:37
From: Tamb
ID: 930914
Subject: re: Atmospheric Scrubbers

dv said:


Tamb said:

dv said:

It’s kind of a bogus concept. The earth is not “pristine” and never was. It is literally covered in filth.

Pre major human influence there were worldwide bushfires on an enormous scale. Almost nothing within their boundaries survived.
These fires put enormous quantities of CO2 into the air.

Right, and previously non-human events had put enormous quantities of CO2 into the air.

Humans are just part of life on earth. There wasn’t some “pristine” pre-human world to which to return, any more than we can return to a pristine pre-dinosaur world.


Those damn volcanoes have a lot to answer for.

Reply Quote

Date: 27/07/2016 13:20:18
From: sibeen
ID: 930915
Subject: re: Atmospheric Scrubbers

diddly-squat said:


dv said:

diddly-squat said:

less easy when you consider the full life cycle carbon cost, but on an operating basis, I agree it’s easy enough…

Come on …

I mean eventually, all power generation on earth will be non-emitting, and the next generation of equipment built after that will have zero full life cycle carbon cost. I don’t know whether that will be in fifty years or five thousand years but it will necessarily occur.

I agree, it’s incredibly difficult to say when that transition will occur… if we nail fusion tomorrow then I’d say we’d be on our way to a carbon free energy future within a decade but if we’re stuck with crummy solar and the like it will take a lot longer…

HEY!!

Crummy solar is currently keeping my children fed and housed.

Reply Quote

Date: 27/07/2016 13:22:13
From: diddly-squat
ID: 930918
Subject: re: Atmospheric Scrubbers

sibeen said:


diddly-squat said:

dv said:

Come on …

I mean eventually, all power generation on earth will be non-emitting, and the next generation of equipment built after that will have zero full life cycle carbon cost. I don’t know whether that will be in fifty years or five thousand years but it will necessarily occur.

I agree, it’s incredibly difficult to say when that transition will occur… if we nail fusion tomorrow then I’d say we’d be on our way to a carbon free energy future within a decade but if we’re stuck with crummy solar and the like it will take a lot longer…

HEY!!

Crummy solar is currently keeping my children fed and housed.

you don’t say… now what’s the line about keeping one’s enemies close??

Reply Quote

Date: 27/07/2016 13:22:56
From: Tamb
ID: 930920
Subject: re: Atmospheric Scrubbers

The Rev Dodgson said:


mollwollfumble said:

Cymek said:

Could we actually build enormous machines to scrub the air and remove any or all human created pollution and bring the levels back down to prior the industrial revolution.

Levels are already back down to prior to the industrial revolution, aren’t they? Let’s see.

Yes, certainly on a per capita basis.

“2,000 years ago, wood charcoal really took off. In AD 43-410, the Romans were coppicing on a truly grand scale. Wood charcoal was not only the fuel of choice at this time, but was also used in making tar for caulking and a thinner version is used in embalming. It was used in dyes, and as construction material in wet areas where rotting was an issue. During this period wood charcoal was also used in filtration and purification of liquids for the first time.”

Air pollution levels during this period of charcoal production were higher than they are now. Particularly soot levels. And that was before the industrial revolution. Wood fires pre-industrial revolution also contributed to the higher pollution levels then.

“Smoke from wood heaters and open fireplaces is a significant source of air pollution in autumn and winter months. When wood is burned, very small particles and gases are released into the atmosphere. These particles and gases are air pollutants. This pollution can affect air quality and impact on our health and quality of life. Woodsmoke pollution has a demonstrated impact on people’s health, especially those who have existing lung or heart conditions such as asthma or angina. Wood smoke can also affect people’s ability to enjoy their home and the outdoors. Complaints about wood smoke are among the most common complaints received by local government and EPA during winter.”

I presume they are neglecting CO2 as a pollutant.

It may be true that air pollution (excluding CO2) in central Rome is now less than it was 2000 years ago (although without an accurate measure of pollution then, we can’t be sure), but I doubt that pollution in central Peking is less than it was 2000 years ago.


I was in Beijing in 82 & again in 06. The photos I took on both occasions show a huge increase in pollution.

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Date: 27/07/2016 13:24:28
From: Tamb
ID: 930922
Subject: re: Atmospheric Scrubbers

sibeen said:


diddly-squat said:

dv said:

Come on …

I mean eventually, all power generation on earth will be non-emitting, and the next generation of equipment built after that will have zero full life cycle carbon cost. I don’t know whether that will be in fifty years or five thousand years but it will necessarily occur.

I agree, it’s incredibly difficult to say when that transition will occur… if we nail fusion tomorrow then I’d say we’d be on our way to a carbon free energy future within a decade but if we’re stuck with crummy solar and the like it will take a lot longer…

HEY!!

Crummy solar is currently keeping my children fed and housed.


Hydro works as a carbon sink also if trees are planted around the lakes.

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Date: 27/07/2016 13:32:40
From: PermeateFree
ID: 930934
Subject: re: Atmospheric Scrubbers

Cymek said:


dv said:

Cymek said:

So how would they work ?

Obv, different mechanisms would be required for different pollutants. The most important one is CO2, for GH effect purposes.

There are plenty of these machines already in existence. People have been working on this since late in the 20th century. The basic chemistry has been known since WW1 at least so the problem is in making it efficient and less expensive.

http://reneweconomy.com.au/2015/blue-crude-audi-pilot-produces-diesel-fuel-from-co2-and-water-66638
The Audi blue crude stream uses renewable energy to electrolyse water, extracts CO2 from the atmosphere and reacts the hydrogen and CO2 to make hydrocarbons.

http://www.sciencealert.com/a-canadian-start-up-is-removing-co2-from-the-air-and-turning-it-into-pellets
This Canadian scheme instead stores the CO2 as carbonate.

These schemes are both focused on sucking up CO2 into a reduced form that can be later used as fuel, but if we want to permanently reduce the CO2 levels, we don’t want them to be a “fuel”: we want to store them in a form that will be solid and stable for a long time, probably as graphite.

Of course this raises the question of what we are going to do with trillions of tonnes of graphite. Maybe we could use it as a building material.

—-

BTW for mine, I think that reforestation is an easy way to stick away unwanted carbon. Not instead of the high-tech method, but as well as.

Yes that obviously makes a lot of sense to do both.

Unless with higher temperatures and the greater likelihood of forest fires burns them all down.

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Date: 27/07/2016 13:36:54
From: PermeateFree
ID: 930939
Subject: re: Atmospheric Scrubbers

Tamb said:


dv said:

It’s kind of a bogus concept. The earth is not “pristine” and never was. It is literally covered in filth.

Pre major human influence there were worldwide bushfires on an enormous scale. Almost nothing within their boundaries survived.
These fires put enormous quantities of CO2 into the air.

Refs?

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Date: 27/07/2016 21:25:25
From: mollwollfumble
ID: 931315
Subject: re: Atmospheric Scrubbers

Tamb said:


I presume they are neglecting CO2 as a pollutant.

It may be true that air pollution (excluding CO2) in central Rome is now less than it was 2000 years ago (although without an accurate measure of pollution then, we can’t be sure), but I doubt that pollution in central Peking is less than it was 2000 years ago.


I was in Beijing in 82 & again in 06. The photos I took on both occasions show a huge increase in pollution.

mollwollfumble refuses to accept food additive E290 as a “pollutant”. For starters it’s very much safer than H2O.

Not just in ancient Rome, throughout the whole of Europe in pre-industrial-revolution times from 1470 onward the air pollution was probably worse than it is today. Possibly even in pre-European Australia – the aborigines used to light bushfires you know.

There’s no doubt that water pollution is less now that in pre-industrial-revolution times, even on an absolute (rather than per capita) scale. Back then they dumped raw sewage in the streets and rivers.

Differences in Beijing – could just be a bad or good week. Depending on the wind speed and height of the inversion layer (if any) the pollution in Beijing can vary day to day by a factor of 1000 or so. Pollution levels throughout the USA have dropped almost alarmingly.

I have seen massively huge reductions in air and water pollution in my lifetime. Particularly throughout Sydney and Wollongong. But also throughout England. And also in the open ocean.

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Date: 3/08/2016 08:56:54
From: mollwollfumble
ID: 934780
Subject: re: Atmospheric Scrubbers

I met a chemist yesterday who has developed a new method for removing carbon dioxide from the atmosphere. Originally from Sheffield University, he’s a specialist in organo-metallic chemistry and has developed a new small organo-metallic chemical that does the catalysis. True story.

There’s just one teensy tiny drawback……..

…..It converts carbon dioxide to carbon monoxide.

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Date: 3/08/2016 08:58:42
From: roughbarked
ID: 934782
Subject: re: Atmospheric Scrubbers

mollwollfumble said:


I met a chemist yesterday who has developed a new method for removing carbon dioxide from the atmosphere. Originally from Sheffield University, he’s a specialist in organo-metallic chemistry and has developed a new small organo-metallic chemical that does the catalysis. True story.

There’s just one teensy tiny drawback……..

…..It converts carbon dioxide to carbon monoxide.

That will solve the population overload.

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