文献类型：期刊文献

英文题名：Interface mediated crystallization of plate-like SAPO-41 crystals to promote catalytic hydroisomerization

作者：Zhao, Xiaoling[1];Liu, Wei[2];Wang, Jiaqi[3];Yang, Weimin[2];Zhu, Xuedong[1];Zhu, Kake[1]

机构：[1]East China Univ Sci & Technol, UNILAB, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Sinopec, Shanghai Res Inst Petrochem Technol, 1658 Pudong North Rd, Shanghai 201208, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：602

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：;EI(收录号：20202908956630);WOS:【SCI-EXPANDED(收录号:WOS:000554006800066)】；

基金：KZ is grateful for the financial support from National Natural Science Foundation of China (21878079). The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterizations.

语种：英文

外文关键词：SAPO-41; Plate-like crystals; Biphasic media; Hydroisomerization

摘要：Silicoaluminophosphates SAPO-41 is a superior unidimensional zeotype catalyst used in hydroisomerization. Generation of hierarchically structured SAPO-41 provides an effective way to promote its hydroisomerization selectivity, which is nonetheless difficult to achieve due to the formation of impurities. Herein, we report crystallization of plate-like crystals of pure phase SAPO-41 in a toluene-aqueous biphasic media in the presence of both Pr2NH and oleylamine. The obtained material has a larger adjustable range of silicon content (n(Si)/(n(Al) +n(Si)+n(P)) = 0.02-0.15), intermediate acidity and reduced diffusion path length along the micropore channel direction. Catalytic tests for n-heptane hydroisomerization on Pt loaded plate-like SAPO-41 crystals showed that the yield of the isomerized products could reach up to 68 %, with respect to 57 % for a control sample. The selectivities for isomers were found to increase with decreasing Si contents and enhanced diffusion properties, suggesting side beta-scission reaction was disfavored at reduced acid site density and shortened diffusion path length.