化工学报2018，Vol.69Issue(2)：741-749,9.DOI:10.11949/j.issn.0438-1157.20170821
真空变压吸附提纯沼气的实验
Biogas upgrading by vacuum pressure swing adsorption process
摘要
Abstract
The carbon molecular sieve was adopted as adsorbent for biogas upgrading, and the morphologies of carbon molecular sieve were examined by scanning electron microscopy while the pore-size distribution was characterized by CO2 adsorption at 273.15 K. With the volume method, the adsorption isotherms of carbon dioxide and methane on carbon molecular sieve were measured at 283.15, 303.15, and 323.15 K and at pressure up to 0.5 MPa, while the diffusion coefficient of carbon dioxide and methane on carbon molecular sieve were also determined. The breakthrough experiments were implemented on single fixed bed, and the effects of adsorption pressure and feed flow rate on the breakthrough curve of CO2 were explored. Two-bed-six-step vacuum pressure swing adsorption (VPSA) process was carry out with the adsorption pressure of 0.3 MPa and the feed flow rate of 4 L·min-1. In addition, the effects of adsorption step time and product flush ratio on separation performances were also investigated. The experimental results show that the purity of methane could be achieved to 98% with a recovery of 82% when adsorption time was set to be 140 s with a product flush ratio of 0.05.关键词
分子筛/真空变压吸附/沼气/甲烷/二氧化碳Key words
molecular sieve/vacuum pressure swing adsorption/biogas/methane/carbon dioxide分类
化学化工引用本文复制引用
田彩霞,沈圆辉,张东辉,甘海南..真空变压吸附提纯沼气的实验[J].化工学报,2018,69(2):741-749,9.基金项目
化学工程联合国家重点实验室开放课题资助项目(SKL-ChE-16B05).supported by the State Key Laboratory of Chemical Engineering(SKL-ChE-16B05). （SKL-ChE-16B05）
