When the temperature is raised (or pressure reduced), the CO 2 is released. When the system temperature is lowered (or pressure increased), CO 2 adheres to the particle surfaces. Research has mainly focused on sorbent materials present as small particles whose surfaces contain “active sites” that capture CO 2 - a process called adsorption. And developing a technology that can capture the CO 2 in the air is a particularly hard problem, in part because the CO 2 occurs in such low concentrations.Ī key problem with CO 2 capture is finding a “sorbent” that will pick up CO 2 in a stream of gas and then release it so the sorbent is clean and ready for reuse and the released CO 2 stream can be utilized or sent to a sequestration site for long-term storage. “Even if all those emitters stopped tomorrow morning, we would still have to do something about the amount of CO 2 in the air if we’re going to restore preindustrial atmospheric levels at a rate relevant to humanity,” says Sahag Voskian SM ’15, PhD ’19, co-founder and chief technology officer at Verdox, Inc. To make matters worse, capturing CO 2 emissions from all anthropogenic sources may not solve the climate problem. In short, they’re not a solution for airplanes, home heating systems, or automobiles. But those systems are each the size of a chemical plant, cost hundreds of millions of dollars, require a lot of energy to run, and work only on exhaust streams that contain high concentrations of CO 2. Some power plants now have CO 2 capture equipment that grabs CO 2 out of their exhaust. An essential component of any climate change mitigation plan is cutting carbon dioxide (CO 2) emissions from human activities.
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