Fabricating self-assembled SAPO-5 with tailored mesoporosity and acidity using a single templateElectronic supplementary information (ESI) available: Supporting Information is available from the Royal Society of Chemistry Online Library or from the author. Supplementary data (SEM images of the SAPO-5-1.5TEA and SAPO-5-2.0TEA, catalysis performance of the SAPO-5-TEA series catalysts and the other SAPO-5-DBA catalysts associated with this article can be found in the online version. See DOI: 10.103

• Main Authors: Chen, Zhou, Zhu, Shaohong, Li, Pengyun, Li, Xinyuan, Xu, Yingrui, Dong, Yunyun, Song, Wenjing, Yi, Xiaodong, Fang, Weiping
• Format: Journal Article
• Language: English
• Published: 11.09.2017
• ISSN: 1466-8033
• DOI: 10.1039/c7ce01132f

The hierarchically structured zeolite with high surface area and a large number of mesoporosities has attracted tremendous attention. Particularly, the morphology and structural tailoring of a diverse mesoporous zeolite with a single template is regarded as a crucial step toward the realization of an environmentally friendly synthesis. Herein, crystalline silicoaluminophosphate (SAPO-5) of the AFI framework type with a bimodal pore system was hydrothermally synthesized using di- n -butylamine (DBA) as a single template. The structural and catalytic properties of the hierarchical SAPO-5 were extensively characterized and compared to those of a conventional SAPO-5 using triethylamine (TEA) as a template. After loading Pt nanoparticles by incipient wetness impregnation, due to the promoting effect of hierarchical SAPO-5 in which the reactant and product were rapidly contacted with the acidity sites and metal sites, the 0.5 wt% Pt/SAPO-5-1.0DBA catalyst exhibits an enhanced hydroisomerization performance, with heptane conversion of 76.1% and iso-C7 yields of 48.4%, compared to a conventional 0.5 wt% Pt/SAPO-5-1.0TEA catalyst. The crystallization evolution under a series of hydrothermal times was also studied here. More importantly, this green, sustainable and economical strategy will extend the application of the synthesis of a silicoaluminophosphate-based zeolite. SAPO-5 zeolite with a bimodal pore system was hydrothermally synthesized using di- n -butylamine as single template. The structural and catalytic properties of the hierarchical SAPO-5 were extensively characterized and compared to those of conventional SAPO-5 using triethylamine as template.