Trapping CO2 With Lime | Chemical & Engineering News
Volume 86 Issue 22 | p. 7, 9, 11 | Letters
Issue Date: June 2, 2008

Trapping CO2 With Lime

Department: Letters

Regarding Michael Auerbach's letter (C&EN, April 28, page 6), the problem with using lime to trap CO2 is that to make lime, one must heat limestone (CaCO3) to drive off the CO2. Therefore a stoichiometric amount of CO2 must first be released to make the CaO used to trap CO2.

In addition, of course, there is the CO2 released from burning hydrocarbon fuel to generate the heat needed to decompose the limestone.

James Carr
Lincoln, Neb.

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