A route to selectively increase the microporous structure of zeolite and its optimization in the ethanol to butadiene reaction  

作　　者：Tian Ye Yuhao Bai Kewei Wang Weijie Hu Meng Zhang Li-Ming Wu 

机构地区：[1]School of Chemical Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,Guangdong,PR China [2]School of Chemistry,Guangdong University of Petrochemical Technology,Maoming 525000,Guangdong,PR China [3]College of Chemistry,Beijing Normal University,Beijing,100875,PR China

出　　处：《Industrial Chemistry & Materials》2024年第1期100-109,共10页工业化学与材料（英文）

基　　金：The authors thank Guangdong Provincial Science and Technology Innovation Strategy(Maoming2021S0007)for financing this study.

摘　　要：Control over the pore structure of zeolite is very important,so researchers are trying to regulate the pore structure of zeolite through various methods to endow it with better performance in industrial applications.Here,a confined etching route that could selectively increase the microporous structure of zeolite is developed using ethanol/amine buffer solution.Ethanol is introduced into an aqueous amine solution,where it could decrease the migration rate and concentration of hydroxyl ions which can etch the framework atoms of zeolite to fabricate various porous structures,consequently developing a confined etching route that could selectively increase the microporous structure of zeolite,unlike conventional approaches that generally increase mesoporous and macroporous architectures.In addition,ethanol enhances the solubility of amine in water,and a buffer solution(ethanol/amine)is formed,which is able to release hydroxyl ions continuously.Based on the above confined etching route,a micropore-increased beta crystal is synthesized and when used as a carrier in ZnLaY/beta catalysts,it achieves excellent ethanol conversion of 96.04%and butadiene selectivity of 64.22%in 20 h time-on-stream in an ethanol to butadiene reaction.

关 键 词：ETHANOL Confined etching route Microporeincreased Beta zeolite Ethanol to butadiene 

分 类 号：O64[理学—物理化学]