文献类型：期刊文献

中文题名：用于CH_4/N_2分离的高效活性炭制备及其吸附平衡和动力学研究

英文题名：Preparation of High Efficient Coconut Activated Carbon and Its Adsorption Equilibria and Kinetics of CH_4/N_2

作者：杨林[1];杨颖[1];刘程琳[1];李平[1];于建国[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2017

卷号：43

期号：4

起止页码：449

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

基金：国家国际合作项目(2015DFG42220;S2016G1410);国家自然科学基金(U1610102)

语种：中文

中文关键词：椰壳基活性炭;CH4/N2分离;吸附平衡;吸附动力学;非常规天然气

外文关键词：coconut activated carbon; CH4/N2 separation; adsorption equilibrium; adsorption kinetics; unconventional natural gases

摘要：以椰壳为活性炭原材料,通过高温炭化、对KOH活化条件进行优化,制备出高比表面积活性炭,并采用CO_2二次活化提高微孔材料对CH_4/N_2的吸附选择性,研制出高效吸附分离CH_4/N_2的椰壳活性炭。采用磁悬浮热天平测量了303~363K、0~1 000kPa下CH_4和N_2在所制备的高效椰壳活性炭上的吸附等温线,采用Toth模型对吸附平衡数据进行拟合,获得模型参数和吸附热等动力学参数。建立等温、无动量损失的双分散二级孔结构扩散模型,采用稀释穿透曲线法研究了CH_4和N_2在此高效椰壳活性炭上的吸附动力学。最后,通过固定床吸附分离CH_4/N_2的实验,研究了椰壳活性炭动态吸附分离CH_4/N_2机理,为优化设计CH_4/N_2吸附分离过程提供基础理论依据。
Coconut activated carbon with high specific surface area was prepared through carbonization of raw coconut shell and KOH activation under optimum conditions. The adsorption selectivity of CH4/N2 was improved with CO2 activation in order to prepare the high efficient coconut activated carbon for theseparation of CH4/N2. The adsorption equilibrium isotherms of CH4 and N2 on the high efficient coconutactivated carbon were measured at 303-363 K and 0-1 000 kPa in a magnetic suspension balance. The experimental data were fitted with Toth model, and the model parameters and kinetic ones such as adsorption heat were obtained. Both the isothermal bidisperse pore model and the diluted breakthrough curve experiment were used to study the adsorption kinetics of CH4 and N2 on the high efficient coconut activated carbon. Furthermore, the fixed-bed adsorption and desorption experiments were carried out to study the separation mechanism of CH4/N2 using the coconut activated carbon. The results presented herewould be significant for the development and optimization of pressure swing adsorption process forCH4/N2 effective separation using the high efficient coconut activated carbon.