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Current status and challenges of the ammonia-based CO2 capture technologies toward commercialization

2013; Elsevier BV; Volume: 14; Linguagem: Inglês

10.1016/j.ijggc.2013.01.007

1750-5836

Kunwoo Han, Chi Kyu Ahn, Man Su Lee, Chang Houn Rhee, Je Young Kim, Hee Dong Chun,

Industrial Gas Emission Control

The present work reviews the current status and prospects of ammonia-based CO2 capture technology, an alternative to conventional amine-based CO2 capture technology. The absorption chemistry and engineering issues for the process development and commercialization are dealt with. Representative developers at pilot-scale testing are Alstom, Powerspan, Commonwealth Scientific and Industrial Research Organization, and Research Institute of Industrial Science & Technology, while lab- and bench-scale studies have at Korea Institute of Energy Research, Tsinghua University and Norwegian University of Science & Technology, etc. Published works on CO2 capture using aqueous ammonia state the removal efficiency of CO2 can be 90% and the product purity exceeds 98%, implying that the technical feasibility has been proven. Although being said that it is in the pre-stage of commercialization, some technical issues including the ammonia slip should be resolved to secure economic plausibility. Suggestions are made for the successful development of ammonia-based CO2 capture process for commercialization: suppression of ammonia vaporization, heat integration, minimization of absorbent flow rate, and bicarbonate-prevalent operation.