文献类型：期刊文献

英文题名：Two-stage VPSA process for CO2 capture from flue gas using activated carbon beads

作者：Shen, Chunzhi[1]; Liu, Zhen[1]; Li, Ping[1]; Yu, Jianguo[1]

机构：[1] State Key Laboratory of Chemical Engineering, College of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2012

卷号：51

期号：13

起止页码：5011

外文期刊名：Industrial and Engineering Chemistry Research

收录：EI(收录号：20121514939187)

语种：英文

外文关键词：Activated carbon - Flue gases - Gas adsorption - Pressurization

摘要：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. ? 2012 American Chemical Society.