Most energy scenarios suggest carbon capture and storage (CCS) from power generation might contribute to reduce the carbon emissions necessary to stabilize the long-term global average atmospheric temperature. The stripper can be operated at any convenient pressure at which steam can be extracted from the power plant. The reboiler duty has also been expressed in terms of equivalent work that can calculate the output from the turbines in the power plant. The results show that energy savings of 29%-33% can be achieved by using 5m K+/2.5m PZ over MEA at a stripper pressure of 160 kPa with a 5☌ temperature approach. This model can be used to simulate stripper performance for a variety of solvents and operating conditions (e.g., pressure, approach temperature, rich and lean loading). This chapter presents a study in which a model was developed to estimate the steam requirements for stripping CO2 from two aqueous solvents, 7m monoethanolamine (MEA) and 5m K+/2.5m piperazine (PZ). The steam requirement for stripping is estimated to be about 20% –40 % of the power plant output. The growing interest in CO2 capture from large point sources, offers another opportunity for the use of this technology. Aqueous amines have been the conventional method for CO2 removal in ammonia, natural gas and refinery streams for decades. Publisher Summary Aqueous absorption/stripping is a technology for CO2 capture from a flue gas.
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