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Hierarchical ZSM-11 with intergrowth structures:Synthesis,characterization and catalytic properties

Journal of Energy Chemistry 2013年第5期22卷 761-768页

作者： Qingjun Yu Chaoyue Cui Qiang Zhang Jing Chen Yang Li Jinpeng Sun Chunyi Li Qiukai Cui Chaohe Yang Honghong Shan State Key Laboratory of Heavy Oil Processing Department of Chemical Engineering China University of Petroleum (East China) Dagang Petrochemical Company PetroChina Corporation

Hierarchical ZSM-11 microspheres with intercrystalline mesoporous properties and rod-like crystals intergrowth morphology have been synthesized using a spot of tetrabutylammonium as a single ***,FTIR,SEM,TEM and N2 adsorption analysis revealed that each individual particle was composed of nanosized rod crystals inserting each other and the intercrystalline voids existing among rods gave a significant mesopore size *** treatment result demonstrated the excellent hydrothermal stability of *** crystallization modes including constant temperature crystallization (one-stage crystallization) and two-stage temperature-varying crystallization with different 1st stage durations were *** results suggested that the crystallization modes were mainly responsible for the adjustable particle size and textural properties of samples while the small amount of tetrabutylammonium bromide was mainly used to direct the formation of both ZSM-11 framework and its intergrowth ***,the performance of optimal ZSM-11 as an active component for the catalytic pyrolysis of heavy oil was also *** with the commercial pyrolysis catalyst,the hierarchical ZSM-11 catalyst exhibited a high selectivity to desired products(LPG+gasoline+diesel),as well as a much lower dry gas and coke yield,plus a high selectivity and yield of light olefins(C=3 C=4)and very poor selectivity to ***,fully open micropore-mesopore connectivity would make such hierarchically porous ZSM-11 zeolites very attractive for applications in clean petrochemical catalysis field.

关键词： intercrystalline mesopore rod-like crystal single template crystallization modes accessibility hydrothermal stability catalytic pyrolysis

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Effect of Hydrophobic Carbon Chain Length on the Crystal Structure of MCM-41

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Chinese Journal of Chemical Engineering 2008年第4期16卷 631-634页

作者：张光旭陶玲张高勇 School of Chemical Engineering Wuhan University of Technology Wuhan 430072 China College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China

The mesoporous molecular sieve (MCM)-41 using ionic liquid as template has been prepared. The typical template of ionic liquid was [C16mim]X. In this article, the use of 1-alkyl-3-methylimidazolium ([Cnmim]Br, where n=12,14,16,18,20) salts as templates in the synthesis of MCM-41 is reported. The results showed that the synthesized MCM-41 had uniform pore diameter, high surface area and stable framework. The largest surface area of MCM-41 was the one prepared with [C14mim]Br as template. When using [C18min]Br as template, the narrowest pore distribution sample was obtained and the effect of surface tension of template solution to MCM-41 was first discussed.

关键词： ionic liquid MCM-41 surface tension single template

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