复合分子筛的合成及其在纤维素水解反应中的应用  

Synthesis of composite zeolites and their performance in hydrolysis of cellulose

作　　者：于杰 王景芸[2] 王震[2] 周明东 王海彦[1,2] YU Jie;WANG Jing-yun;WANG Zhen;ZHOU Ming-dong;WANG Hai-yan(College of Chemical Engineering,China University of Petroleum,Qingdao 266580,China;;School of Chemistry and Materials Science,Liaoning Shihua University,Fushun 113001,China;Shenyang Paraffin Chemical Co Ltd,Shenyang 110141,China)

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580 [2]辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001 [3]沈阳石蜡化工有限公司,辽宁沈阳110141

出　　处：《燃料化学学报》2018年第4期419-426,共8页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21101085);辽宁省自然科学基金(2015020196;20170540590);抚顺科学计划(FSKJHT 201423);辽宁高校优秀人才培养计划(LJQ2012031);辽宁石油化工大学博士科研启动基金(2016XJJ-063)资助~~

摘　　要：采用水热晶化法制备了HUSY@MFI核壳结构复合分子筛。通过XRD、SEM、N_2吸附-脱附、NH_3-TPD及吡啶吸附红外等手段表征催化剂的结构和性质。结果表明,HUSY@MFI晶粒在形貌上呈椭球状,表面是鳞片状结构的MFI型分子筛,里面是光滑的HUSY型分子筛,焙烧模板剂前几乎没有或只有很少量的N_2能进入其孔道结构,致密的壳层MFI覆盖在HUSY型分子筛表面,形成了新的弱酸位,而中强酸强度和酸类型并没有受到影响,复合分子筛的表面酸量及总酸量减少。将所制备的HUSY@MFI复合分子筛催化剂应用于以离子液体1-乙基-3-甲基咪唑氯盐([Emim]Cl)为溶剂的纤维素水解反应中,与HUSY催化的纤维素水解相比,HUSY@M FI复合分子筛催化纤维素水解反应的速率较慢,葡萄糖收率由30.9%提高到41.3%。In this paper,core-shell composite zeolites(HUSY@MFI)were prepared by hydrothermal method.The composite zeolites were characterized by XRD,SEM,N 2-adsorption,NH 3-TPD and Py-FTIR.The results indicated that HUSY@MFI has both HUSY and MFI structure.Scanning Electron Microscope(SEM)reflects a core-shell morphology of [e-mail] particles displayed an elliptical sphere structure with scale-like surface.The growth of MFI shell results in a decrease of external acid density and the total acid sites.When the HUSY@MFI was used as catalyst instead of HUSY in hydrolysis of cellulose to glucose in 1-ethyl-3-methylimidazolium chloride([Emim]Cl),the glucose yield could be significantly improved from 30.9%to 41.3%.

关 键 词：HUSY@MFI HUSY 纤维素 水解 葡萄糖 

分 类 号：O643.36[理学—物理化学]