文献类型：期刊文献

中文题名：改性MCM-22分子筛吸附脱除油品中二氯甲烷的研究

英文题名：Adsorption of dichloromethane from oil with modified MCM-22 zeolites

作者：刘卫兵[1];邹滢[1];刘宁强[1]

机构：[1]华东理工大学石油加工研究所,上海200237

年份：2015

卷号：35

期号：4

起止页码：108

中文期刊名：现代化工

外文期刊名：Modern Chemical Industry

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：油品;二氯甲烷;脱氯;MCM-22分子筛

外文关键词：oil ; dichloromethane; dechlorination ; MCM-22 zeolite

摘要：采用离子交换法制备了不同金属离子(Ni2+、Co2+、Fe3+)改性的MCM-22分子筛。采用XRD、NH3-TPD和BET对吸附剂进行了表征,同时,考察了MCM-22分子筛经不同金属离子改性后作为吸附剂对模型化合物的脱氯性能,优化了吸附剂的活化条件,并在吸附试验中研究了最优吸附剂吸附二氯甲烷的动力学和吸附活化能。结果表明,吸附剂的最优活化温度及时间分别为450℃和4 h。脱氯效果顺序为:Ni MCM-22>Co MCM-22>Fe MCM-22>MCM-22,最优吸附剂Ni MCM-22分子筛上吸附动力学可用拟二级动力学进行较好的描述,吸附过程以化学吸附为主。
The modified MCM-22 zeolites are prepared by ion exchanging with Ni2＋, Co2＋ and FeB＋ ions and characterized by XRD, NH3-TPD and BET. The dechlorination performance of the obtained adsorbents, MCM-22 zeolites modified with metal ions, is studied. The activation conditions of the adsorbents are optimized. The dynamics of dichloromethane and adsorption activation energy of the optimal adsorbents are also investigated. The results show that the optimal activation temperature and activation time are 450℃ and 4 hours, respectively. The dechlorination performance of the modified adsorbents is found to follow the order： NiMCM-22 〉 CoMCM-22 〉 FeMCM-22 〉 MCM-22. The adsorption dynamics of NiMCM-22 appears to be pseudo-sencond order equation and the adsorption process is chemical adsorption.