文献类型：期刊文献

英文题名：A solvent evaporation route towards fabrication of hierarchically porous ZSM-11 with highly accessible mesopores

作者：Song, Wen[1];Liu, Zhiting[1];Liu, Liping[2];Skov, Anne Ladegaard[3];Song, Nan[1];Xiong, Guang[2];Zhu, Kake[1];Zhou, Xinggui[1]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, UNILAB, Shanghai 200237, Peoples R China;[2]Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Liaoning, Peoples R China;[3]Tech Univ Denmark, Dept Chem & Biochem Engn, Ctr Energy Resources Engn, DK-2800 Lyngby, Denmark

年份：2015

卷号：5

期号：39

起止页码：31195

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20151500740718);WOS:【SCI-EXPANDED(收录号:WOS:000352791300094)】；

基金：KZ is grateful for the financial support from Fundamental Research Funds for the Central Universities (WB 1213004-1), and New Century Excellent Talents in University (NCET-11-0644). KZ is also indebted to ELECTRONANOMAT (Grant Agreement Number: PIRSES-GA-2012-318990) sponsored by the Marie-Curie Act program of EU for the trip to Denmark. XZ is thankful for National Natural Science Foundation of China (U1162112) for the Financial support. ZL is grateful for the Fundamental Research Funds for the Central Universities (WA 1514011).

语种：英文

外文关键词：Evaporation - Probes - Zeolites - Molecules - Self assembly

摘要：A route to generate hierarchically porous zeolite ZSM-11 has been paved via solvent evaporation induced self-assembly assisted by hexadecyltrimethoxysilane to produce a preformed dry gel, followed by its subsequent transformation into zeolite via steam-assisted-crystallization. The crystallization in dry gel has been found to undergo an orientated attachment growth mechanism whereby hexadecyltrimethoxysilane directs the formation of auxiliary mesopores and inhibits the fusion of primary nucleates. Measurements such as XRD, SEM, TEM, N-2-physisorption, and TEM for an inverse replica of Pt derived from hierarchical ZSM-11 have been conducted to characterize the textural properties of the material. Ammonia temperature-programmed-desorption (NH3-TPD) measurements and infrared spectra using probe molecules such as pyridine (Py-IR) and 2,4,6-collidine (Coll-IR) have been collected to investigate the acidic properties as well as the accessibility of the acid sites. The hierarchical ZSM-11 possesses more acid sites on the mesopore surfaces that are accessible towards large probe molecules such as 2,4,6-collidine. This improvement together with the enhanced pore-connectivity brings about an increase in 1,3,5-triisopropylbenzene cracking activity and benzene selectivity with respect to a conventional counterpart.