摘要
采用单床方法模拟了10床5组分变压吸附提H_2,考察了吸附剂配比和均压次数的影响。结果显示,在计算条件下,H_2摩尔分数99.955%,CO含量0.26 mmol/kmol,氢气回收率90%,与工业数据吻合;从吸附结束到顺放结束,负载曲线峰面动态移动,N_2和CO负载曲线有"驼峰"形成;逆放和冲洗2个步骤解吸的杂质量最多,再生结束后CH_4残余3.29%,残余比例最小;随着分子筛比例的增加,H_2纯度增加,CO含量降低,进入分子筛层CO_2量增加,分子筛比例70%较为合适;均压次数从2次增加至5次,H_2回收率从83.6%增加至90%,原料气处理能力从1.4 mol/s减小至0.999 mol/s。
A single bed method with non-isothermal model is used to simulate the purification of hydrogen from fivecomponent mixture by ten-bed pressure swing adsorption（ PSA） facility. The effects of the ratio of adsorbents and the frequency of equal pressure on adsorption properties are studied. The results show that H2 purity reaches 99. 955 mol%with a CO content of 0. 26 mmol/kmol and the H2 recovery rate is 90% under the conditions of calculation,which are consistent with industrial data.The loading curve peak surface has been moving dynamically from the end of adsorption to the end of path-wise pressure release（ PP）,and the loading curves of both N2 and CO form ＂hump ＂ shape. The discharge（ D） step and PP2 step release the most impurities and the residual amount of methane is 3. 29% at the regeneration end,which is the least residual amount.With the increasing ratio of molecular sieve,H2 purity increases,CO content decreases,the amount of CO2 entering molecular sieve layer increases. The optimum ratio of molecular sieve is 70%.The H2 recovery rate increases from 83. 6% to 90% and the capacity of handing feed gases decreases from 1. 4 mol·s^-1 to 0. 999 mol·s^-1 when the frequency of equal pressure increases from 2 to 5.
作者
卜令兵
BU Ling-bing(Sichuan Tianyi Science and Technology- Co., Ltd., Chengdu 610225, China)
出处
《现代化工》
CAS
CSCD
北大核心
2018年第4期215-219,共5页
Modern Chemical Industry
关键词
变压吸附
吸附
解吸
氢
模拟
pressure swing adsorption
adsorption
desorption
hydrogen
simulation
作者简介
卜令兵（1978-），男，硕士，高级工程师，研究方向为变压吸附气体分离与净化，通讯联系人，bib_ustb@qq．com。
