采用碳分子筛变压吸附法分离N_2/CH_4混合气的试验
摘要
采用BELSORP-max型BET分析仪测试绘制了298 K、0~100 k Pa下N_2、CH_4纯组分在碳分子筛上的吸附等温线,并使用单塔变压吸附装置测试绘制了N_2/CH_4混合气中CH_4的动态吸附穿透曲线,研究了不同吸附压力和停留时间对N_2/CH_4混合气分离的影响。结果表明:吸附压力设为1.2 MPa、停留时间735 s是比较合适的吸附分离条件;在吸附初期,CH_4首先穿透吸附床层,其次才是N_2。
引文
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[2]马东祝,李坚,王洪明,等.Sr改性椰壳炭吸附分离CH4/N2的试验研究[J].安全与环境学报,2014,14(5):170-173.
[3]聂李红,徐绍平,苏艳敏,等.低浓度煤层气提纯的研究现状[J].化工进展,2008,27(10):1 505-1 506.
[4]辜敏,鲜学福,张代均,等.变压吸附技术分离CH4/N2气体混合物[J].煤炭学报,2002,27(2):197-198.
[5]章川泉,林文胜,顾安忠,等.CH4/N2混合气体在CMS上的低温吸附分离实验研究[J].低温与超导,2008,36(5):9-12.
[6]慈红英,李明,卢少瑜,等.CH4/N2在炭分子筛上的吸附动力学[J].煤炭学报,2010(2):316-319.
[7]张正旺,杨华伟,张东辉,等.新型真空变压吸附法模拟分离N2/CH4/CO2[J].现代化工,2014,34(3):147-151.
[8]马正飞,丁艳宾,赵春风,等.变压吸附法净化含N2气体中微量CO的脱附过程[J].南京工业大学学报,2009,32(4):6-11.
[9]史乃弘.CMSCH4浓缩甲烷碳分子筛吸附剂[J].天然气化工,2014,39(6):44-47.
[10]郭璞,李明.煤层气中CH4/N2分离工艺研究进展[J].化工进展,2008,27(7):963-982.
[11]Fatehi A I,Loughlin K F,Hassan M M.Separation of methane-nitrogen mixtures by pressure swing adsorption using a carbon molecular sieve[J].Gas Separation&Purification,1995,9(3):199-204.
[12]西南化工研究设计院.变压吸附法富集煤矿瓦斯气中甲烷:85103557[P].1986-06-01.
[13]Simone C,Carlos A G.Separation of CH4/CO2/N2mixtures by layered pressure swing adsorption for upgrade of natural gas[J].Chemical Engineering Science,2006,61:3 893-3 906.
[14]Tremblay P,Savard M M.Gas permeability,diffusivity and solubility of nitrogen,helium,Methane,carbon dioxide and formaldehyde in dense polymeric membranes using a new on-line permeation apparatus[J].Journal of Membrane Science,2006,282(1/2):245-256.
[15]席芳,林文胜,顾安忠.CH4/N2混合气在炭分子筛上的变压吸附分离[J].煤炭学报,2011,36(6):1 032-1 035.
[16]席芳,林文胜,顾安忠,等.炭分子筛吸附分离CH4/N2混合物的研究进展[J].低温与超导,2010,38(9):41-44.
[17]王骏成,胡明振,孙林兵,等.碳分子筛变压吸附提纯沼气的性能[J].化工进展,2015,34(9):3 452-3 486.
[18]Gao T,Lin W S,Gu A Z,et al.Coalbed methane liquefaction adopting a nitrogen expansion process with propane pre-cooling[J].Applied Energy,2010,87(7):2 142-2 147.
[19]Gao T,Lin W S,Gu A Z,et al.Optimization of coalbed methane liquefaction process adopting mixed refrigerant cycle with propane precooling[J].Journal of Chemical Engineering of Japan,2009,42(12):893-901.
[20]Fatehi A.Separation of methane nitrogen mixtures by pressure swing adsorption using a carbon molecular sieve[J].Gas Separation&Purification,1995,31(9):199-204.
[21]辜敏,鲜学福.提高煤矿抽放煤层气甲烷浓度的变压吸附技术的理论研究[J].天然气化工,2006,31(6):6-10.