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Fabricating self-assembled SAPO-5 with tailored mesoporosity and acidity using a single template

Abstract

Hierarchically structured zeolite with high surface area and a large number of mesoporosity have attracted tremendous attention. Particularly, the morphology and structural tailoring of diverse mesoporous zeolite with single template is regarded as crucial step toward the realization of environment 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 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 (TEA) as 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, 0.5wt%Pt/SAPO-5-1.0DBA catalyst exhibits the higher hydroisomerization performance with heptane conversion of 76.1 % and iso-C7 yields of 48.4 % than conventional 0.5wt%Pt/SAPO-5-1.0TEA catalyst. The crtstallization evolution under a series of hydrothermal time was also studied here. More importantly, this green, sustainable and economical strategy will extend the application of synthesis of silicoaluminophosphate-based zeolite.

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Publication details

The article was received on 17 Jun 2017, accepted on 09 Aug 2017 and first published on 09 Aug 2017


Article type: Paper
DOI: 10.1039/C7CE01132F
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Fabricating self-assembled SAPO-5 with tailored mesoporosity and acidity using a single template

    Z. Chen, S. Zhu, P. Li, X. Li, Y. Xu, Y. Dong, W. Song, X. Yi and W. Fang, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE01132F

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