碱溶蚀作用对介孔结构形成及微-介孔复合材料性质的影响  

Effects of alkali-dissolving on formations of mesopore structures and characteristics of micro/mesoporous composites

作　　者：赵民 夏海渤 张亚东 孙永 王荣源 刘东[2] ZHAO Min;XIA Haibo;ZHANG Yadong;SUN Yong;WANG Rongyuan;LIU Dong(CRRC Qingdao Sifang Locomotive & Rolling Stock Company Limited, Qingdao 266111, China;State Key Laboratory of Heavy Oil Processing in China University of Petroleum (East China), Qingdao 266580, China)

机构地区：[1]中国中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]中国石油大学(华东)重质油国家重点实验室,山东青岛266580

出　　处：《中国石油大学学报（自然科学版）》2022年第2期205-210,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家重点研发计划(2017YFB0602500)。

摘　　要：采用碱溶解沸石法制备微-介孔复合材料Y/MCM-41,通过改变原沸石碱处理时间调控沸石结构溶蚀程度,研究碱溶蚀作用对介孔相形成及微-介孔复合材料性质的影响。结果表明随着原沸石碱溶蚀程度加深,晶体骨架脱硅现象明显,微孔结构破坏度逐渐加重,同时从沸石晶体表面溶解出的硅铝物种数量增多,有助于高稳定性介孔相组装形成,从而构成微-介双孔级复合材料;原沸石碱溶蚀程度对制得的复合材料的孔结构和酸性质具有显著影响。In this study,the method of dissolving zeolite using alkali solution was employed to prepare micro/mesoporous Y/MCM-41 composites,and the dissolution degrees of zeolitic structures were controlled via changing the alkali-dissolving time.The effects of alkali-dissolving on mesopore phase formations and characteristics of bi-porous composites were investigated.Results indicate that the desilication of zeolite crystal frameworks is aggravated with increasing the alkali-dissolving severity,and thus zeolite micropore structures are damaged more seriously.Meanwhile,high alkali-dissolving severities can facilitate the leaching of silicon-aluminum species,which contributes to the formation of mesopore phases with high stability.Furthermore,the degree of alkali dissolution to original zeolite presents significant influences on textural and acid characteristics of as-prepared composites.

关 键 词：微-介孔复合材料 碱溶解 微孔沸石 介孔结构 

分 类 号：TQ426.94[化学工程]