Transalkylation of Multi-secbutylbenzenes with Benzene over Hierarchical Beta Zeolite  

多级孔道β分子筛上苯与多仲丁基苯烷基转移反应(英文)

作　　者：李英霞 罗灿 王煊 黄崇品 陈标华 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology [2]Changling Petrochemical Engineering Design Co.Ltd.

出　　处：《Chinese Journal of Chemical Engineering》2014年第8期898-902,共5页中国化学工程学报（英文版）

摘　　要：A hierarchical beta zeolite synthesized by quasi-solid phase conversion method was characterized by BET, scanning electron microscope （SEM）, transmission electron microscope （TEM）, X-ray diffraction （XRD）, temperature-programmed desorption of ammonia （NH3-TPD）, 27A1 and 295i magic angle spinning nuclear magnetic resonance （27A1 and 29Si MAS NMR）, and its catalytic performance was compared with that of conventional microporous beta zeolite for liquid phase transalkylation of multi-secbutylbenzenes （MSBBs） with benzene. The results indicate that the hierarchical beta zeolite consists of nanosized crystals with a meso/ microporous structure and has stronger acid strength than the microporous beta zeolite. The higher conversion oftri-secbutylbenzene （TSBB） and selectivity ofsec-butylbenzene （SBB） are achieved on hierarchical beta zeolite than microporous beta zeolite, while the conversion of di-secbutylbenzene （DSBB） is slightly higher. The improvement of catalytic performance over hierarchical beta zeolite can be ascribed to the presence of mesopores, nanosized crystals and stronger acidity.A hierarchical beta zeolite synthesized by quasi-solid phase conversion method was characterized by BET.scanning electron microscope(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD).temperature-programmed desorption of ammonia(NH_3-TPD),^(27)AI and ^(29)Si magic angle spinning nuclear magnetic resonance(^(27)Al and ^(29)Si MAS NMR),and its catalytic performance was compared with that of conventional microporous beta zeolite for liquid phase transalkylation of multi-secbutylbenzenes(MSBBs)with benzene.The results indicate that the hierarchical beta zeolite consists of nanosized crystals with a meso,microporous structure and has stronger acid strength than the microporous beta zeolite.The higher conversion of tri-secbutylbenzene(TSBB) and selectivity of sec-butylbenzene(SBB) are achieved on hierarchical beta zeolite than microporous beta zeolite,while the conversion of di-secbutylbenzene(DSBB) is slightly higher.The improvement of catalytic performance over hierarchical beta zeolite can be ascribed to the presence of mesopores,nanosized crystals and stronger acidity.

关 键 词：Hierarchical zeolite Multi-secbutylbenzene TRANSALKYLATION MESOPORE Nanoparticles REACTIVITY 

分 类 号：O643.32[理学—物理化学]