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    Banned Raphael's Avatar
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    New way to remove CO 2 from the air

    NO WARMING DUE TO CO2 -- not that there has been any .
    SPECIES EXTINCTION OVER
    SEND GRETA BACK TO SCHOOL .

    A new way of removing carbon dioxide from a stream of air could provide a significant tool in the battle against climate change. The new system can work on the gas at virtually any concentration level, even down to the roughly 400 parts per million currently found in the atmosphere.
    Air entering the system passes to one of two chambers containing battery electrodes that attract the carbon dioxide. Then the airflow is switched to the other chamber, while the accumulated carbon dioxide in the first chamber is flushed into a separate storage tank . These alternating flows allow for continuous operation of the two-step process.

    Most methods of removing carbon dioxide from a stream of gas require higher concentrations, such as those found in the flue emissions from fossil fuel-based power plants. A few variations have been developed that can work with the low concentrations found in air, but the new method is significantly less energy-intensive and expensive, the researchers say.

    The technique, based on passing air through a stack of charged electrochemical plates, is described in a new paper in the journal Energy and Environmental Science, by MIT postdoc Sahag Voskian, who developed the work during his PhD, and T. Alan Hatton, the Ralph Landau Professor of Chemical Engineering.

    The device is essentially a large, specialized battery that absorbs carbon dioxide from the air (or other gas stream) passing over its electrodes as it is being charged up, and then releases the gas as it is being discharged. In operation, the device would simply alternate between charging and discharging, with fresh air or feed gas being blown through the system during the charging cycle, and then the pure, concentrated carbon dioxide being blown out during the discharging.

    As the battery charges, an electrochemical reaction takes place at the surface of each of a stack of electrodes. These are coated with a compound called polyanthraquinone, which is composited with carbon nanotubes. The electrodes have a natural affinity for carbon dioxide and readily react with its molecules in the airstream or feed gas, even when it is present at very low concentrations. The reverse reaction takes place when the battery is discharged — during which the device can provide part of the power needed for the whole system — and in the process ejects a stream of pure carbon dioxide. The whole system operates at room temperature and normal air pressure.

    “The greatest advantage of this technology over most other carbon capture or carbon absorbing technologies is the binary nature of the adsorbent’s affinity to carbon dioxide,” explains Voskian. In other words, the electrode material, by its nature, “has either a high affinity or no affinity whatsoever,” depending on the battery’s state of charging or discharging. Other reactions used for carbon capture require intermediate chemical processing steps or the input of significant energy such as heat, or pressure differences.

    “This binary affinity allows capture of carbon dioxide from any concentration, including 400 parts per million, and allows its release into any carrier stream, including 100 percent CO2,” Voskian says. That is, as any gas flows through the stack of these flat electrochemical cells, during the release step the captured carbon dioxide will be carried along with it. For example, if the desired end-product is pure carbon dioxide to be used in the carbonation of beverages, then a stream of the pure gas can be blown through the plates. The captured gas is then released from the plates and joins the stream.

    In some soft-drink bottling plants, fossil fuel is burned to generate the carbon dioxide needed to give the drinks their fizz. Similarly, some farmers burn natural gas to produce carbon dioxide to feed their plants in greenhouses. The new system could eliminate that need for fossil fuels in these applications, and in the process actually be taking the greenhouse gas right out of the air, Voskian says. Alternatively, the pure carbon dioxide stream could be compressed and injected underground for long-term disposal, or even made into fuel through a series of chemical and electrochemical processes.

    A flow of air or flue gas (blue) containing carbon dioxide (red) enters the system from the left. As it passes between the thin battery electrode plates, carbon dioxide attaches to the charged plates while the cleaned airstream passes on through and exits at right.
    A flow of air or flue gas (blue) containing carbon dioxide (red) enters the system from the left. As it passes between the thin battery electrode plates, carbon dioxide attaches to the charged plates while the cleaned airstream passes on through and exits at right.
    Image courtesy of the researchers

    The process this system uses for capturing and releasing carbon dioxide “is revolutionary” he says. “All of this is at ambient conditions — there’s no need for thermal, pressure, or chemical input. It’s just these very thin sheets, with both surfaces active, that can be stacked in a box and connected to a source of electricity.”


    “In my laboratories, we have been striving to develop new technologies to tackle a range of environmental issues that avoid the need for thermal energy sources, changes in system pressure, or addition of chemicals to complete the separation and release cycles,” Hatton says. “This carbon dioxide capture technology is a clear demonstration of the power of electrochemical approaches that require only small swings in voltage to drive the separations.”​

    In a working plant — for example, in a power plant where exhaust gas is being produced continuously — two sets of such stacks of the electrochemical cells could be set up side by side to operate in parallel, with flue gas being directed first at one set for carbon capture, then diverted to the second set while the first set goes into its discharge cycle. By alternating back and forth, the system could always be both capturing and discharging the gas. In the lab, the team has proven the system can withstand at least 7,000 charging-discharging cycles, with a 30 percent loss in efficiency over that time. The researchers estimate that they can readily improve that to 20,000 to 50,000 cycles.

    The electrodes themselves can be manufactured by standard chemical processing methods. While today this is done in a laboratory setting, it can be adapted so that ultimately they could be made in large quantities through a roll-to-roll manufacturing process similar to a newspaper printing press, Voskian says. “We have developed very cost-effective techniques,” he says, estimating that it could be produced for something like tens of dollars per square meter of electrode.

    Compared to other existing carbon capture technologies, this system is quite energy efficient, using about one gigajoule of energy per ton of carbon dioxide captured, consistently. Other existing methods have energy consumption which vary between 1 to 10 gigajoules per ton, depending on the inlet carbon dioxide concentration, Voskian says.

    The researchers have set up a company called Verdox to commercialize the process, and hope to develop a pilot-scale plant within the next few years, he says. And the system is very easy to scale up, he says: “If you want more capacity, you just need to make more electrodes.”


    Contacts and sources:
    David Chandler
    Massachusetts Institute of Technology (MIT)

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    Banned Raphael's Avatar
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    Re: New way to remove CO 2 from the air

    Deep State will soon put an end to this brilliant invention .
    There are trillions to be made from a Carbon Tax .

    No way that it will be allowed to be developed .

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    Proudly humble LarsMac's Avatar
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    Re: New way to remove CO 2 from the air

    It really is a great idea.
    So we can develop a technology that can do what the normal cooling of the Arctic and Antarctic used to do for us until we turned up the heat.
    Of course the Trumpers, who claim no Global warming has actually taken place will object. I mean it would be a admission that they were wrong to start with.

    Trump will never go for this idea. He doesn't believe in Climate Change
    “The reality we can put into words is never reality itself.”
    ― Werner Heisenberg
    "The trouble with people isn't that they don't know, but that they know so much that ain't so."
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    Senior Member Bryn Mawr's Avatar
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    Re: New way to remove CO 2 from the air

    Quote Originally Posted by LarsMac View Post
    It really is a great idea.
    So we can develop a technology that can do what the normal cooling of the Arctic and Antarctic used to do for us until we turned up the heat.
    Of course the Trumpers, who claim no Global warming has actually taken place will object. I mean it would be a admission that they were wrong to start with.

    Trump will never go for this idea. He doesn't believe in Climate Change
    It might be interesting to calculate out the billions of cubic miles of air that would have to be processed and the millions of cubic kilometres of carbon that would have to be stored in order to bring the carbon dioxide levels back to pre-industrialisation values.

    A nice lab demonstration maybe but a significant tool, no.

  5. #5
    Banned Raphael's Avatar
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    Re: New way to remove CO 2 from the air

    Mister Trump does believe in Climate change .

    As do all people who have eyes and a sense of feeling .

    What he questions --- as do so many others -- is the unproven assertion that there is Warming and that a substantial part of this warming is man produced .

    I think the Warming hoax has essentially been abandoned as the support wheels have come off , and the thrust has now switched to controlling climate change .What a joke that is !

    This represents monumental intellectual illness because climate change is most influenced by the type of space the sun moves through , the intensity of galaxy centre cosmic rays and the amount of sun activity measured in the number of sun spots and coronal ejections .
    Which of these and other related matters will Greta and her batty friends and supporters set about changing first ?
    Good luck with the hyper drive and anti gravity ships , weapons and other equipment , Greta !!!!!!!!!

    To further complicate matters Dr Zakharova has recently ( 2015 ?) shown that the sun is powered by four and not two interacting electro magnetic centres and that these are right now at a phase which will guarantee this planet a temperature level equivalent to a mini ice age .

    We will see the first evidence for this hypothesis now . This winter .

    In fact the US eastern seaboard may provide a clear cut signal in the next few days ( should have started ) .

    What do I see ?

    A lot of people covered in egg and a band of pseudo scientists whom , at minimum , should be publicly flogged .

  6. #6
    Proudly humble LarsMac's Avatar
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    Re: New way to remove CO 2 from the air

    Quote Originally Posted by Raphael View Post
    Mister Trump does believe in Climate change .

    As do all people who have eyes and a sense of feeling .

    What he questions --- as do so many others -- is the unproven assertion that there is Warming and that a substantial part of this warming is man produced .

    I think the Warming hoax has essentially been abandoned as the support wheels have come off , and the thrust has now switched to controlling climate change .What a joke that is !

    This represents monumental intellectual illness because climate change is most influenced by the type of space the sun moves through , the intensity of galaxy centre cosmic rays and the amount of sun activity measured in the number of sun spots and coronal ejections .
    Which of these and other related matters will Greta and her batty friends and supporters set about changing first ?
    Good luck with the hyper drive and anti gravity ships , weapons and other equipment , Greta !!!!!!!!!

    To further complicate matters Dr Zakharova has recently ( 2015 ?) shown that the sun is powered by four and not two interacting electro magnetic centres and that these are right now at a phase which will guarantee this planet a temperature level equivalent to a mini ice age .

    We will see the first evidence for this hypothesis now . This winter .

    In fact the US eastern seaboard may provide a clear cut signal in the next few days ( should have started ) .

    What do I see ?

    A lot of people covered in egg and a band of pseudo scientists whom , at minimum , should be publicly flogged .
    Please do share the good Doctors research.
    “The reality we can put into words is never reality itself.”
    ― Werner Heisenberg
    "The trouble with people isn't that they don't know, but that they know so much that ain't so."
    - Will Rogers
    "Truth isn't Truth"
    - Rudy Giuliani

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    Proudly humble LarsMac's Avatar
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    Re: New way to remove CO 2 from the air

    Quote Originally Posted by Bryn Mawr View Post
    It might be interesting to calculate out the billions of cubic miles of air that would have to be processed and the millions of cubic kilometres of carbon that would have to be stored in order to bring the carbon dioxide levels back to pre-industrialisation values.

    A nice lab demonstration maybe but a significant tool, no.
    I spent a good couple of sleepless hours last night contemplating the task.

    considering the centuries it took to store up all that CO2 to begin with, and the one for us to release it all into the atmosphere, I do not think that Human civilization is quite up to the task.
    “The reality we can put into words is never reality itself.”
    ― Werner Heisenberg
    "The trouble with people isn't that they don't know, but that they know so much that ain't so."
    - Will Rogers
    "Truth isn't Truth"
    - Rudy Giuliani

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