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Air-capture of CO2 using waste process heat

By Scott Jenkins |

Carbon-negative technology being commercialized by Global Thermostat LLC (New York, N.Y.; www.globalthermostat.com) removes carbon dioxide directly from the atmosphere using low-cost waste process heat from industrial processes. The technology works in a similar fashion to cogeneration approaches and could transform heavy CO2-emitters into carbon sinks, according to the company. Founded by Graciela Chichilnisky and Peter Eisenberger — Columbia University (New York, N.Y.; www.columbia.edu) professors who are contributors to the Intergovernmental Panel on Climate Change (IPCC; Geneva, Switzerland; www.ipcc.ch) — Global Thermostat built a demonstration facility for the technology at the Silicon Valley campus of research nonprofit SRI International (Menlo Park, Calif.; www.sri.com). The company recently secured a commercial partnership with NRG Energy. The technology works by blowing air (or an air/fluegas mixture) over a wall of honeycomb contactors developed by Corning Inc. (Corning, N.Y.; www.corning.com). Similar to the high-surface-area materials used in automobile catalytic converters, the Corning monoliths allow contact with large volumes of air at small pressure drops and low cost. The honeycomb monoliths are coated with a…
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