Open AccessCO2 Capture by Absorption with Potassium Carbonate
Author(s) -
Gary T. Rochelle,
Eric Chen,
Babatunde Oyenekan,
Andrew Sexton,
Jason J. Davis,
Marcus Hilliard,
Amornvadee Veawab
Publication year - 2006
Language(s) - English
Resource type - Reports
DOI - 10.2172/895539
Subject(s) - piperazine , potassium carbonate , alkanolamine , chemistry , ethylenediamine , solubility , absorption (acoustics) , aqueous solution , solvent , carbonate , potassium , inorganic chemistry , nuclear chemistry , materials science , organic chemistry , composite material
The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. Ethylenediamine was detected in a degraded solution of MEA/PZ solution, suggesting that piperazine is subject to oxidation. Stripper modeling has demonstrated that vacuum strippers will be more energy efficient if constructed short and fat rather than tall and skinny. The matrix stripper has been identified as a configuration that will significantly reduce energy use. Extensive measurements of CO{sub 2} solubility in 7 m MEA at 40 and 60 C have confirmed the work by Jou and Mather. Corrosion of carbon steel without inhibitors increases from 19 to 181 mpy in lean solutions of 6.2 m MEA/PZ as piperazine increases from 0 to 3.1 m