不同晶粒大小Silicalite-1分子筛的合成及其MTP反应性能  

Synthesis of Silicalite-1 Zeolite with Different Particle Size and Its Application in MTP Reaction

作　　者：张洪菡 张善鹤 孟哲[1] 李春义[1] 山红红[1] ZHANG Hong- han;ZHANG Shan- he;MENG Zhe;LI Chun-y i;SHAN Hong-hong(State Key Laboratory of Heavy Oil Processing,China University of Petroleum （East China） ,Qingdao 26 6580,Chin)

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,青岛266580

出　　处：《硅酸盐通报》2018年第1期309-314,320,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家重点基础研究发展计划(973计划)(2012CB215006)

摘　　要：采用不同模板剂和碱源合成一系列Silicalite-1分子筛。所得样品通过X射线衍射仪(XRD),氮气吸脱附仪,电子扫描电镜(SEM),氨气程序升温脱附仪(NH3-TPD)和傅里叶红外光谱仪(FT-IR)表征。结果表明:TPA+具有稳定的正四面体结构,在合成Silicalite-1分子筛的过程中导向作用最强;通过改变碱源调节凝胶碱度,碱度降低,晶粒尺寸增大。将最佳条件下制备的Silicalite-1催化剂应用于甲醇制丙烯(MTP)反应中,与工业lurgi催化剂相比,Silicalite-1催化剂具有丙烯选择性高、失活速率慢的特点。A series of Silicalite-1 zeolites were synthesized with different templates and p H regulators.The obtained samples were characterized by XRD,N2adsorption-desorption,SEM,NH3-TPD and FT-IR.The results indicate that TPA＋exhibited the best structure-directing performance due to its stable tetrahedral structure;colloidal alkalinity is verified through changing p H regulators,as a result the alkalinity decreased and the grain size increased.The as-synthesized Silicalite-1 catalyst obtained from optimum conditions is applied to MTP reaction,compared with industrialized lurgi catalyst,the Silicalite-1 catalyst has the characteristics of the higher selectivity to propene and the lower deactivation rate.

关 键 词：SILICALITE-1 模板剂 碱源 MTP 

分 类 号：TE624.91[石油与天然气工程—油气加工工程]