Dual alkali approaches for the capture and separation of CO{sub 2}

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The Solvay process utilizes two alkalis in sequential order to convert CO{sub 2} to sodium carbonate for commercial use. The ability to transform CO{sub 2} into sodium carbonate cost-effectively would be a breakthrough in CO{sub 2} sequestration by providing benign long-term storage of CO{sub 2}. However, the Solvay process was not designed for CO{sub 2} sequestration and is not practical for use in the sequestration of CO{sub 2} from fossil fuel power plants. This paper investigates methods to modify the process in order to make it effective for the control of power plant CO{sub 2} emissions. The new modified process, ... continued below

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22 pages

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Huang, H. P.; Shi, Y.; Li, W. & Chang, S. G. April 4, 2000.

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Description

The Solvay process utilizes two alkalis in sequential order to convert CO{sub 2} to sodium carbonate for commercial use. The ability to transform CO{sub 2} into sodium carbonate cost-effectively would be a breakthrough in CO{sub 2} sequestration by providing benign long-term storage of CO{sub 2}. However, the Solvay process was not designed for CO{sub 2} sequestration and is not practical for use in the sequestration of CO{sub 2} from fossil fuel power plants. This paper investigates methods to modify the process in order to make it effective for the control of power plant CO{sub 2} emissions. The new modified process, called the Dual Alkali Approach, attempts to replace either or both bases, ammonia and lime, in the Solvay process with other compounds to make CO{sub 2} capture and separation efficient. Ammonia was replaced with different amines in aqueous solutions of salts and it was found that bicarbonate precipitation did occur. A method to regenerate the amine in the second step has not been implemented. However, the second step in Solvay Process has been implemented without using lime, namely, ammonia has been regenerated from an ammonium chloride solution using activated carbon. The HCl adsorbed in the activated carbon was removed by water to regenerate the activated carbon.

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22 pages

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OSTI as DE00775133

Source

  • American Chemical Society CO2 Capture, Utilization and Sequestration, Washington, DC (US), 08/20/2000--08/24/2000

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  • Report No.: LBNL--45858
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 775133
  • Archival Resource Key: ark:/67531/metadc717736

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • April 4, 2000

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • May 5, 2016, 2:35 p.m.

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Huang, H. P.; Shi, Y.; Li, W. & Chang, S. G. Dual alkali approaches for the capture and separation of CO{sub 2}, article, April 4, 2000; California. (digital.library.unt.edu/ark:/67531/metadc717736/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.