Optimized Process for Post-Combustion CO_2 Capture in Thermoelectric Power Plant using structured packing

摘要

The purpose of this work is to simulate CO_2 capture process, using Monoethanolaminern(MEA) at 30 % weight, at power plant and using Aspen Plus? simulator. CO_2 isrnremoved by chemical absorption processes from the flue gases of the power plant. Thernmain challenge of the chemical absorption CO_2 capture processes is reducing the energyrnrequirement in the stripper which has contributors from reboiler energy consumptionrnand maximum CO_2 absorption. This work presents an enhancement the structuredrnpacking study in separation columns: ININ 18, Sulzer BX and Mellapak 250Y, and thernadvance of CCS technologies (CO_2 capture and sequestration). This ININ 18 materialrnwas developed by the Mexican National Institute of Nuclear Research (ININ by itsrnacronym in Spanish). The parameters studied were: Separation absorption efficiency,rnflow ratio (L/G) values in order to find the load or turbulence regimen in absorptionrnprocess, reboiler duty at desorption column, and column diameters at different treatedrnflue gas flows. The results showed that Sulzer BX had the highest volumetric massrntransfer coefficient values and the lowest height of mass transfer equivalent unit, withrn3.76 s~(-1) and 0.317 m, respectively, with 600 t/h flue gas flow, and the paper discussesrnthe selection of most important parameters necessary to obtain 90 % capture rate andrnthe lowest energy consumption for CO_2 capture plants in comparison with respect to thernother two packings. Sulzer BX packing shows decreased reboiler energy consumptionrnwith 8.5 MJ/kg CO_2.