Instant exactness synthesis and n-heptane hydroisomerization of high performance Ni/SAPO-11 catalyst
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Instant exactness synthesis and n‑heptane hydroisomerization of high performance Ni/SAPO‑11 catalyst Zhishuai Yuan1 · Yuchun Cheng2 · Shoutao Ma1 · Zhen Jiang1 · Yisi Zhou1 · Yingjun Wang1 · Wei Zhang1 · Yanhua Suo1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract A new method called Instant Exactness Synthesis (IES), which was applied to prepare SAPO-11 molecular sieve, was introduced innovatively. The metal–acid bifunctional Ni/SAPO-11-IES catalyst with a Ni content of 4% was prepared by the impregnation method. Ni/SAPO-11-H catalyst was prepared as a comparative sample through the traditional hydrothermal method. In addition, the growth mechanism was used to explain the excellent performance of catalyst prepared by IES method in detail. The structure of Ni/SAPO-11-IES was confirmed via XRD and TEM characterization. The pore structure of the molecular sieve was determined by nitrogen adsorption and desorption. 29Si MAS NMR measurement was used to illustrate multiple silicon environment which supported the excellent acidity in N H3-TPD measurement. Furthermore, the favourable dispersibility of Ni species was proved by the mapping of the elements and EDS. Benefiting from the superior performance of materials, Ni/SAPO-11-IES catalyst exhibited a higher catalytic performance for n-heptane hydroisomerization with n-heptane conversion of 82% and isoheptane selectivity of 86%, respectively, compared with other catalysts in the same system. The study also provides new ideas for the preparation of molecular sieve materials. Keywords Ni/SAPO-11 · Instant exactness synthesis (IES) method · Hydroisomerization · N-heptane
1 Introduction Since the discovery of the fossil fuel, humans have become hugely dependent on it to maintain the functioning of the modern society. However, the combustion of gasoline leads Wei Zhang and Yanhua Suo are the co-corresponding authors for this article Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10934-020-00920-1) contains supplementary material, which is available to authorized users. * Wei Zhang [email protected] * Yanhua Suo [email protected] 1
College of Chemistry and Chemical Engineering, Northeast Petroleum University, 99# Xuefu Street, High‑tech Industrial Development District, Daqing 163318, Heilongjiang, People’s Republic of China
Daqing Science and Technology Bureau, Daqing 163000, People’s Republic of China
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to the emission of harmful gases into the atmosphere, causing the greenhouse effect. Octane number is an indicator used to judge the resistance of gasoline explosion performance. N-heptane which is an usual component in gasoline is extremely easy to cause the explosion, so its octane number is set to zero. Increasing the octane number of gasoline has been proved to be extremely challenging, because it is an important component of aviation fuel. Some researchers have removed oxygen from biodiesel (FAME) by hydrodeoxygenation (HDO), decarbonylation and decarboxylation [1, 2]. However, t
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