A concern with plans for capture of CO 2 directly from ambient air (DAC), is the sheer

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A concern with plans for capture of CO2 directly from ambient air (DAC), is the sheer volume of material that must be processed. One design requires fans to blow air at 2 m/s through 2.8 m thickness of absorber and other materials and aims to absorb 50% of the CO2 from the air stream. Assume a rectangular installation of length L, height 100 m (and thickness 2.8 m).How large must L be in order for this DAC plant to remove the CO2 produced by a 1 GWe coal-fired power plant operating at 30% efficiency? How large a population(in the US or in your country) could have its carbon footprint eliminated by this DAC plant assuming the plant to be powered by a non-carbon source?Use the results of Problem 35.11 to redo this estimate if the coal power plant itself powers the DAC facility.

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The Physics of Energy

ISBN: 978-1107016651

1st edition

Authors: Robert L. Jaffe, Washington Taylor

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