碱处理对ZSM-5分子筛膜结构及其催化性能的影响  

Influence of Alkali Treatment on Structure and Catalytic Performance of ZSM-5Films

作　　者：袁方[1] 厉刚[1] 胡申林 

机构地区：[1]浙江大学化学系,浙江杭州310027 [2]高超声速冲压发动机技术重点实验室,北京100074

出　　处：《石油学报（石油加工）》2014年第1期140-144,共5页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(50976103)资助

摘　　要：以片状或管状不锈钢为载体,采用原位生长法制备ZSM-5分子筛膜,考察了碱处理对ZSM-5分子筛膜结构及其催化性能的影响。结果表明,用0.2mol/L的NaOH溶液处理ZSM-5分子筛膜时,碱处理温度偏高或时间偏长,均会导致分子筛膜表面出现裂痕,影响膜基界面结合强度;在合适的碱处理条件下,可避免分子筛膜出现裂痕,但不能如粉末样品那样产生介孔;碱处理可溶解分子筛膜表面的无定型物质,从而改善其催化性能。ZSM-5 films were prepared on the surface of stainless steel plates or tubes by means of insitu growth method.The influence of alkali treatment on structure and catalytic performance of ZSM-5 films were studied.The results showed that the treatment of ZSM-5 films in 0.2 mol/L NaOH solution with long time or high temperature caused formation of cracks in the film,which could affect the adhesion strength between the film and the substrate.Under appropriate conditions of alkali treatment,the formation of cracks in the film could be avoided.The mesopores could not be produced in the film under the conditions at which mesopores could be formed in the powdery sample.The amorphous materials presented on the film surface were dissolved during alkali treatment,thus the catalytic performance of the film would be improved.

关 键 词：原位生长法 碱处理 ZSM-5分子筛膜 

分 类 号：O611.4[理学—无机化学]