CAJ | 학술논문

应用浸渍法在ZSM-5沸石分子筛孔道中引入过渡金属Zn物种,制备了具有不同Zn含量的Zn/ZSM-5。考察了反应温度、催化剂用量、催化剂的酸性性质等条件对γ-戊内酯芳构化产物组成(气、液、固产物)及其液体成分含量的影响。实验结果表明,ZSM-5分子筛孔道中引入Zn后,可以有效改变液体产物成分以及影响气体和固体产物收率。当ZSM-5分子筛孔道中引入Zn物种后,能够明显提高液体产物中苯、甲苯、乙苯、萘等芳香类化合物的含量,表明Zn物种能促进γ-戊内酯芳构化反应的进行。
응용침지법재ZSM-5비석분자사공도중인입과도금속Zn물충,제비료구유불동Zn함량적Zn/ZSM-5。고찰료반응온도、최화제용량、최화제적산성성질등조건대γ-무내지방구화산물조성(기、액、고산물)급기액체성분함량적영향。실험결과표명,ZSM-5분자사공도중인입Zn후,가이유효개변액체산물성분이급영향기체화고체산물수솔。당ZSM-5분자사공도중인입Zn물충후,능구명현제고액체산물중분、갑분、을분、내등방향류화합물적함량,표명Zn물충능촉진γ-무내지방구화반응적진행。
Zn/ZSM-5 zeolite catalysts with different Zn contents were prepared by impregnating method. The influence of reaction temperature, reaction time, catalyst dosage, and the acidic properties of catalysts on the conversion of γ-valerolactone to aromatic compounds was investigated. The results show that the introduction of Zn into H-ZSM-5 channel could effective modify the components of liquid product and influence the yields of gas, liquid, and solid as compared to H-ZSM-5 catalyst and non-catalytic conversion of γ-valerolactone. Zn/ZSM-5 catalyst affords the higher contents of aromatic compound compared to H-ZSM-5 and silica catalysts in the liquid product under identical reaction conditions. Therefore, Zn species of Zn/ZSM-5 can not only effectively improve the conversion of γ-valerolactone, but also enhance the formation of aromatic compounds, suggesting that Zn species play a very key role in the formation of these aromatic compounds.