粘结剂对成型ZSM-5在甲苯甲醇烷基化中性能的影响
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- 英文论文题名：Effects of Binders on the Performance of Extruded ZSM-5 Catalysts in Toluene Methylation
- 论文作者：常洋 ; 王奕人 ; 郭新闻
- 英文论文作者：Yang Chang ; Yiren Wang ; Xinwen Guo ; State Key Laboratory of Fine Chemicals ; School of Chemical Engineering ; Dalian University of Technology
- 年：2016
- 作者机构：大连理工大学精细化工国家重点实验室化工学院催化化学与工程系;
- 论文关键词：对二甲苯 ; 择形催化 ; 成型
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十二分会： 多孔功能材料
- 语种：中文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十二分会 ; 多孔功能材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：184k
- 原文格式：D
- 会议级别：全国
摘要
对二甲苯(PX)是重要的基本有机化工原料,主要用于生产对苯二甲酸(PTA),是聚酯(PET)产业链的源头。甲苯甲醇择形烷基化直接合成高浓度PX,可减少分离和异构化工艺,是最有发展前景的PX生产新工艺。本研究利用原位XRD、NH3-TPD、扫描电镜、N2-物理吸附、Py-IR、~(27)Al MAS NMR等表征手段,研究了凹凸棒土(At)和氧化铝(Al)作为粘结剂对挤出成型ZSM-5催化剂的影响。研究发现,相比于氧化铝,凹凸棒土可以作为粘结剂与改性剂,一步完成对ZSM-5沸石的成型与改性,提高催化剂的对二甲苯选择性并延长催化剂寿命。这主要归功于凹凸棒土中的碱金属和碱土金属离子,在反应过程中迁移到沸石表面,修饰ZSM-5表面活性中心,从而提高成型甲苯甲醇烷基化催化剂性能。
A facile preparation route for extruded ZSM-5 based para-selective toluene methylation catalyst was developed by using attapulgite as binders.Effects of binders on the performance of shaped toluene methylation catalysts was studied by toluene methylation performance,in-situ XRD,NH3-TPD,N_2-physisorption,SEM,Py-IR and ~(27)Al MAS NMR.Catalysts using attapulgite as a binder,compared to boehmite,shows higher para-selectivity and longer life-span.The unique role of attapulgite in promoting the para-selectivity and longevity is correlated with the migration of alkaline earth cations in attapulgite and its modifying effect on the ZSM-5 acid sites.
A facile preparation route for extruded ZSM-5 based para-selective toluene methylation catalyst was developed by using attapulgite as binders.Effects of binders on the performance of shaped toluene methylation catalysts was studied by toluene methylation performance,in-situ XRD,NH3-TPD,N_2-physisorption,SEM,Py-IR and ~(27)Al MAS NMR.Catalysts using attapulgite as a binder,compared to boehmite,shows higher para-selectivity and longer life-span.The unique role of attapulgite in promoting the para-selectivity and longevity is correlated with the migration of alkaline earth cations in attapulgite and its modifying effect on the ZSM-5 acid sites.
引文
[1]N.,Michels;S.,Mitchell;J.,Perez-Ramirez.ACS Catal.2014,4:2409.
[2]J.,Hargreaves;A.,Munnoch.Catal.Sci.Technol.2013,3:1165.
[2]J.,Hargreaves;A.,Munnoch.Catal.Sci.Technol.2013,3:1165.