Carbon Management Technology Conference 2019 (CMTC 2019)
Evaluated Results for Pilot Testing of CO2 Capture By Piperazine Regeneratec By the Advanced Flash Stripper
Authors
Eric Chen - Presenter, University of Texas at Austin
Gary T. Rochelle, The University of Texas at Austin
Tianyu Gao, University of Texas at Austin
Yuying Wu, The University of Texas at Austin
Korede Akinpelumi, The University of Texas at Austin
Kent Fischer, The University of Texas at Austin
Ching-Ting Liu, The University of Texas at Austin
Karen Farmer, AECOM process technologies
Andrew Sexton, Trimeric Corporation
CO2 capture from coal-fired flue gas was demonstrated with 5m piperazine (30 wt %) regenerated by the Advanced Flash Stripper in 2018 for more than 2000 hours in a 26-inch absorber at the National Carbon Capture Center. 90 to 99% CO2 removal was achieved with a heat duty of 2.1 to 2.3 GJ/tonne CO2 removed. The stripper was operating at 6 bar with a sump temperature of 150oC. The absorber used two 6-meter beds of structured packing with solvent intercooling between the beds. Amine oxidation was less than 0.2 kg/tonne CO2. Amine aerosol emissions were managed to be less than 1 ppm with 2 ppm of SO3 by operating with a warm lean feed and with a two-stage water wash. Carbon steel was frequently protected by a FeCO3 film, both carbon steel and stainless steel experienced unacceptable corrosion at the hot rich condition at 150oC.