Co2 Capture by Absorption With Potassium Carbonate

Abstract

The objective of this work is to improve the process for CO 2 capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K 2 CO 3 promoted by piperazine. CO 2 mass transfer rates are second order in piperazine concentration and increase with ionic strength. Modeling of stripper performance suggests that 5 m K + /2.5 m PZ will require 25 to 46% less heat than 7 m MEA. The first pilot plant campaign was completed on June 24. The CO 2 penetration through the absorber with 20 feet of Flexipac™ 1Y varied from 0.6 to 16% as the inlet CO 2 varied from 3 to 12% CO 2 and the gas rate varied from 0.5 to 3 kg/m 2 -s.3