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n-Hexane Hydroisomerization on Ni-HMFI Zeolites of Different Preparation Methods

Lyubov Patrylak1,2, Yuliya Voloshyna1, Oleksandra Pertko1, Angela Yakovenko1
Affiliation: 
1 V.P.Kukhar Institute of Bioorganic Chemistry and Petrochemistry of National Academy of Sciences of Ukraine, 1 Academician Kukhar St., Kyiv 02660, Ukraine 2 National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Beresteiskyi Ave., Kyiv 03056, Ukraine lkpg@ukr.net
DOI: 
https://doi.org/
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Keywords:

Abstract: 
A range of bifunctional catalysts based on MFI zeolite with 1.5 wt. % of nickel was synthesized. The aim of this research was to compare the performance of Ni-HZSM-5 zeolites of different methods of nickel loading (ion exchange and impregnation) in n-hexane hydroisomerization. Samples were characterized by XRD, TEM, and low-temperature nitrogen adsorption/desorption. It is stated that using ion exchange, it is more difficult to control nickel content in the samples. Impregnated sample demonstrates 26.1% yield of branched hexane products with 80.4% selectivity for isomers, whereas ion-exchanged sample gives only 12.5% yield with 80.5% selectivity at 513 K in micro pulse investigations. Therefore, impregnation of zeolites with nickel salt is a more suitable method for obtaining active and selective catalysts for hydroisomerization.
References: 

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