CO2 Capture by Absorption with Potassium Carbonate

Rochelle, Gary T. ; Hilliard, Marcus ; Chen, Eric ; Oyenekan, Babatunde ; Dugas, Ross ; McLees, John ; Sexton, Andrew ; Veawab, Amorvadee

University of Texas

关键词: Amines;    Pilot Plants;    Carbon Dioxide;    Promoters;    Absorption;   

DOI  :  10.2172/876056
RP-ID  :  none
RP-ID  :  FC26-02NT41440
RP-ID  :  876056

美国|英语

来源: UNT Digital Library

【 摘 要 】

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. In Campaign 3 of the pilot plant, the overall mass transfer coefficient for the stripper with 7 m MEA decreased from 0.06 to 0.01 mol/(m{sup 3}.s.kPa) as the rich loading increased from 0.45 to 0.6 mol CO{sub 2}/mol MEA. Anion chromatography has demonstrated that nitrate and nitrite are major degradation products of MEA and PZ with pure oxygen. In measurements with the high temperature FTIR in 7 m MEA the MEA vapor pressure varied from 2 to 20 Pa at 35 to 70 C. In 2.5 m PZ the PZ vapor pressure varied from 0.2 to 1 Pa from 37 to 70 C.