高Si/Al比ZSM-5分子筛的晶粒分布调控  

The Control of Crystal Size Distribution of ZSM-5 Zeolite with High Si/Al Ratio

作　　者：荆文静 薛彦峰 李俊汾[3] JING Wenjing;XUE Yanfeng;LI Junfen(Shanxi Engineering Vocational College,Taiyuan Shanxi 030009,China;Department of Chemistry and Chemical Engineering,Taiyuan Institute of Technology,Taiyuan Shanxi 030008,China;Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan Shanxi 030001,China)

机构地区：[1]山西工程职业学院,山西太原030009 [2]太原工业学院化学与化工系,山西太原030008 [3]中国科学院山西煤炭化学研究所,山西太原030001

出　　处：《复旦学报（自然科学版）》2023年第6期747-752,I0001,共7页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金基金(22072105);山西省“1331”工程资助项目。

摘　　要：本文针对晶种法合成微米级ZSM-5分子筛中遇到的低Si/Al比时晶粒分布均匀而高Si/Al比时晶粒分布不均匀的问题开展合成配方和工艺优化研究。考察了晶化温度和合成凝胶碱浓度等条件,分析了高Si/Al比时晶粒分布不均匀的原因,详细讨论了合成时晶化温度、铝量及模板剂对晶化过程的影响,最后通过降低模板剂用量的同时补充相应氢氧化钠的方法成功合成出高Si/Al比晶粒分布均匀的微米级ZSM-5分子筛。The problem of uneven size distribution at high Si/Al ratio in the synthesis of 1μm ZSM-5 zeolite by seeds method is studied.The effect of crystallization temperature and the alkali concentration of synthetic gel were investigated,the reasons of uneven crystal size distribution at high Si/Al ratio were analyzed,and the influence of crystallization temperature,Al and template on the crystallization process were discussed in detail.Finally,the 1μm ZSM-5 zeolite crystal with uniform size distribution at high Si/Al ratio was successfully synthesized by reducing the amount of template and supplementing the corresponding sodium hydroxide.

关 键 词：高Si/Al比 ZSM-5分子筛 晶粒分布 合成调控 

分 类 号：O643.3[理学—物理化学]