高校化学工程学报Issue(3)：484-488,5.DOI:10.3969/j.issn.1003-9015.2014.05.14.03
CH 4/N 2在炭分子筛上的吸附平衡与扩散模型
Study on Adsorption Equilibrium and Diffusion Model of CH4 and N2 on a Carbon Molecular Sieve
摘要
Abstract
Adsorption isotherms and kinetic curves of pure CH4 and N2 gases absorbing onto a carbon molecular sieve were measured by an intelligent gravimetric analyzer apparatus (IGA-100, HIDEN) at 298, 313 and 328 K, respectively. Thermodynamics and diffusion behaviors of CH4 and N2 on the carbon molecular sieve were also investigated. The Double Langmuir (DL) model and the Fick model were introduced to fit the adsorption isotherm and adsorption kinetic data, respectively. The fitting correction coefficients of the DL model for CH4 and N2 are close to 1 and the adsorption capacity of N2 is higher than that of CH4 on the carbon molecular sieve. The results of the Fick model indicate that the diffusion rate of N2 is much faster than that of CH4 on the carbon molecular sieve. Therefore, it is possible to enrich CH4 through a fixed bed using the carbon molecular sieve studied.关键词
CH4/N2/炭分子筛/吸附等温线/扩散模型/Double Langmuir模型Key words
methane/nitrogen/carbon molecular sieve/adsorption isotherm/diffusion model/double langmuir model(DL)分类
化学化工引用本文复制引用
王鹏,石耀琦,马正飞,刘晓勤..CH 4/N 2在炭分子筛上的吸附平衡与扩散模型[J].高校化学工程学报,2014,(3):484-488,5.基金项目
国家自然科学基金(20976082)。 （20976082）
