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Two - stage VPSA process for CO2 capture from flue gas using activated carbon beads / Chunzhi Shen in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5011–5021 Titre : Two - stage VPSA process for CO2 capture from flue gas using activated carbon beads Type de document : texte imprimé Auteurs : Chunzhi Shen, Auteur ; Zhen Liu, Auteur ; Ping Li, Auteur Année de publication : 2012 Article en page(s) : pp. 5011–5021 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Flue  gas  Vacuum  Swing  Adsorption Résumé : Carbon dioxide removal from flue gas with a two-stage vacuum pressure swing adsorption (VPSA) process, which uses activated carbon (AC) beads as the adsorbent, was investigated both theoretically and experimentally. First, single-column VPSA experiments were studied for CO2/N2 separation with high CO2 feed concentration. Then, a two-stage VPSA process composed two columns for each stage was designed, and the effects of different parameters were investigated. The first-stage VPSA unit operates with a four-step Skarstrom cycle, which includes feed pressurization, adsorption, blowdown, and counter-current purge with N2. For the second-stage VPSA process, a cycle with feed pressurization, adsorption, pressure equalization, blowdown and pressure equalization was employed. With the proposed two-stage VPSA process, a CO2 purity of 95.3% was obtained with 74.4% recovery. The total specific power consumption of the two-stage VPSA process is 723.6 kJ/kg-CO2, while the unit productivity is 0.85 mol-CO2/kg·h. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202097y [article] Two - stage VPSA process for CO2 capture from flue gas using activated carbon beads [texte imprimé] / Chunzhi Shen, Auteur ; Zhen Liu, Auteur ; Ping Li, Auteur . - 2012 . - pp. 5011–5021. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5011–5021 Mots-clés : Flue  gas  Vacuum  Swing  Adsorption Résumé : Carbon dioxide removal from flue gas with a two-stage vacuum pressure swing adsorption (VPSA) process, which uses activated carbon (AC) beads as the adsorbent, was investigated both theoretically and experimentally. First, single-column VPSA experiments were studied for CO2/N2 separation with high CO2 feed concentration. Then, a two-stage VPSA process composed two columns for each stage was designed, and the effects of different parameters were investigated. The first-stage VPSA unit operates with a four-step Skarstrom cycle, which includes feed pressurization, adsorption, blowdown, and counter-current purge with N2. For the second-stage VPSA process, a cycle with feed pressurization, adsorption, pressure equalization, blowdown and pressure equalization was employed. With the proposed two-stage VPSA process, a CO2 purity of 95.3% was obtained with 74.4% recovery. The total specific power consumption of the two-stage VPSA process is 723.6 kJ/kg-CO2, while the unit productivity is 0.85 mol-CO2/kg·h. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202097y