The increase in the global atmospheric CO2 concentration resulting from over a century of combustion of fossil fuels has been associated with significant global climate change. With the global population increase driving continued increases in fossil fuel use, humanity’s primary reliance on fossil energy for the next several decades is assured. Traditional modes of carbon capture such as precombustion and postcombustion CO2 capture from large point sources can help slow the rate of increase of the atmospheric CO2 concentration, but only the direct removal of CO2 from the air, or “direct air capture” (DAC), can actually reduce the global atmospheric CO2 concentration. The past decade has seen a steep rise in the use of chemical sorbents that are cycled through sorption and desorption cycles for CO2 removal from ultradilute gases such as air. This Review provides a historical overview of the field of DAC, along with an exhaustive description of the use of chemical sorbents targeted at this application. Solv...

Direct Capture of CO2 from Ambient Air

The capture and removal of low-concentration carbon dioxide from air is appealing. Here, the authors report a metal-organic framework with a precisely tuned network of pores and optimal charge density, which is capable of carbon dioxide uptake at very low partial pressures relevant to direct air capture.

https://hal.archives-ouvertes.fr/hal-02360096/document

Made-to-order metal-organic frameworks for trace carbon dioxide removal and air capture

Systems and methods for lowering levels of carbon dioxide and other atmospheric pollutants are provided. Economically viable systems and processes capable of removing vast quantities of carbon dioxide and other atmospheric pollutants from gaseous waste streams and sequestering them in storage-stable forms are also discussed.

Systems and methods for processing co2

Methods of sequestering carbon dioxide (CO2) are provided. Aspects of the methods include precipitating a storage stable carbon dioxide sequestering product from an alkaline-earth-metal-containing water and then disposing of the product, e.g., by placing the product in a disposal location or using the product as a component of a manufactured composition. Also provided are systems for practicing methods of the invention.

Methods of sequestering CO2

A method and apparatus for extracting CO 2 from air comprising an anion exchange material formed in a matrix exposed to a flow of the air, and for delivering that extracted CO 2 to controlled environments. The present invention contemplates the extraction of CO2 from air using conventional extraction methods or by using one of the extraction methods disclosed; e.g., humidity swing or electro dialysis. The present invention also provides delivery of the CO 2 to greenhouses where increased levels of CO 2 will improve conditions for growth. Alternatively, the CO 2 is fed to an algae culture.

Method and apparatus for extracting carbon dioxide from air

The present invention is directed to methods for removing CO2 from air, which comprises exposing sorbent covered surfaces to the air. The invention also provides for an apparatus for exposing air to a CO2 sorbent. In another aspect, the invention provides a method and apparatus for separating carbon dioxide (CO2) bound in a sorbent.

Removal of carbon dioxide from air

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Removal of carbon dioxide from air