A continuous and high-efficiency process to separate coal bed methane with porous ZIF-8 slurry:Experimental study and mathematical modelling

查看全文 作　　者：Wan [1]Chen;Xiaonan [1]Guo;Enbao [1]Zou;Mengling [1]Luo;Mengzijing [1]Chen;Mingke [1]Yang;Hai [1]Li;Chongzhi [1]Jia;Chun [1]Deng;Changyu [1]Sun;Bei [1]Liu;Lanying [1]Yang;Guangjin [1]Chen

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China

出　　处：《Green Energy & Environment》索引2020年第5卷第3期,共17页

基　　金：The financial supports received from the National Natural Science Foundation of China(21522609,21636009 and 21878328);the National Key Research and Development Program of China(Nos.2017YFC0307302,2016YFC0304003);the Science Foundation of China University of Petroleum,Beijing(No.2462018BJC004);Beijing Science and Technology Program,China(No.Z181100005118010)。 摘　　要：Coal bed methane has been considered as an important energy resource.One major difficulty of purifying coal bed methane comes from the similar physical properties of CH_4 and N_2.The ZIF-8/water-glycol slurry was used as a medium to separate coal bed methane by fluidifying the solid adsorbent material.The sorption equilibrium experiment of binary mixture(CH_4/N_2)and slurry was conducted.The selectivity of CH_4 to N_2 is within the range of 2-6,which proved the feasibility of the slurry separation method.The modified Langmuir equation was used to describe the gas-slurry phase equilibrium behavior,and the calculated results were in good agreement with the experimental data.A continuous absorption-adsorption and desorption process on the separation of CH_4/N_2 in slurry is proposed and its mathematical model is also developed.Sensitivity analysis is conducted to determine the operation conditions and the energy performance of the proposed process was also evaluated.Feed gas contains 30 mol%of methane and the methane concentration in product gas is 95.46 mol%with the methane recovery ratio of 90.74%.The total energy consumption for per unit volume of product gas is determined as 1.846 kWh Nm^(-3).Experimental results and process simulation provide basic data for the design and operation of pilot and industrial plant. 关键词：Coal bed methane Gas separation Phase equilibrium experiment Mathematical model Process simulation

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A continuous and high-efficiency process to separate coal bed methane with porous ZIF-8 slurry:Experimental study and mathematical modelling

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