SIMULATION OF AN OPERATIONAL AMINE BASED CO2 REMOVAL PLANT AS AN EXAMPLE OF CO2 CAPTURE AT COAL-FIRED POWER PLANTS

Among many understudy CO2 capture technologies, amine scrubbing is the most promising near term strategy. In this article, Kent/Eisenberg, Lee/ Mather and Electrolyte Non Random Two Liquid model (E-NRTL) models were utilized to simulate an operational unit based on monoethanolamine (MEA) as solvent and 18 % molar CO2 feed gas. Simulated results are compared to plant data. Important parameters like temperature and pH are traced at absorption and stripping towers and other process equipments. Secondly use of MEA, DGA, MDEA, DEA and DIPA and their mixtures for CO2 Scrubbing were simulated. Our study shows that diglycolamine (DGA) and DGA/MEA mixtures can outperform MEA in energy consumption, tower diameter and circulation rate for flue gases containing high CO2 content. The results of our study can help lowering both capital and operational expenses of CO2 capture.

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