One of the estimates analyzed in this paper is a part of a front-end engineering design (FEED) for the Piperazine with the Advanced Stripper (PZAS) process at the Mustang Station power plant in Denver City, TX, USA . The second is from a FEED using 35 wt % monoethanolamine (MEA) at the Panda Sherman Power Station in Sherman, TX, USA . In this work, key design parameters and features of the respective amine scrubbing applications are first summarized. Then the following analyses are carried out: