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- W2073290377 abstract "Abstract CO 2 and N 2 are reported to be partially separated from a membrane process stream containing CO 2 rich dry mixture, e.g., 80%CO 2 /20%N 2 after removing water vapor from post-combustion flue gas stream. This work focuses on the separation of 80%CO 2 /20%N 2 using vacuum swing adsorption (VSA) technique. In addition, two different feed compositions, with lower CO 2 concentrations, one with 50%CO 2 /50%N 2 (typical of pre-combustion gas mixture composition) and another with 20%CO 2 /80%N 2 were investigated and analyzed both experimentally and theoretically. Single component adsorption isotherms of CO 2 and N 2 in three commercial adsorbents, i.e., activated carbon (AC), carbon molecular sieve (CMS) and zeolite 13X at different temperatures were volumetrically measured. Zeolite 13X sample displayed much stronger adsorption affinity for CO 2 compared to CMS and AC samples. Equilibrium selectivity of CO 2 over N 2 for the three adsorbents was found to be in the order: zeolite 13X > CMS > AC. Single component and binary CO 2 and N 2 column dynamic breakthrough measurements were also carried out for the further adsorbent evaluations. Based on these results zeolite 13X and CMS were chosen for VSA separation of CO 2 and N 2 . The VSA cycle comprises feed pressurization, feed adsorption, CO 2 rinse, cocurrent blowdown, countercurrent blowdown, and countercurrent evacuation. Mixtures of binary CO 2 and N 2 were used in a bench scale, single-column VSA unit to evaluate various operating parameters. Zeolite 13X showed better separation performance than CMS. A home-made software based on a non-isothermal VSA model was developed to simulate the observed VSA behavior. The extensive simulation results involving parametric studies of VSA separation performance were in concurrence with the experimental results." @default.
- W2073290377 created "2016-06-24" @default.
- W2073290377 creator A5043985138 @default.
- W2073290377 creator A5070111932 @default.
- W2073290377 date "2013-01-01" @default.
- W2073290377 modified "2023-09-29" @default.
- W2073290377 title "Commercial adsorbents as benchmark materials for separation of carbon dioxide and nitrogen by vacuum swing adsorption process" @default.
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- W2073290377 doi "https://doi.org/10.1016/j.seppur.2012.10.040" @default.
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