Catalytic Hydrocracking of Fresh and Waste Frying Oil over Ni- and Mo-Based Catalysts Supported on Sulfated Silica for Biogasoline Production

Karna Wijaya,Amalia Febia Pratiwi,Alfrets Daniel Tikoalu,Asma Nadia,Arina Dinana,Arief Cahyo Wibowo

doi:10.3390/catal11101150

Karna Wijaya, Amalia Febia Pratiwi + Show 4 more

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https://doi.org/10.3390/catal11101150

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Abstract

The synthesis of a sulfated silica catalyst and its modification with Ni and/or Mo metal, along with its application for the hydrocracking of fresh and waste frying oil into biogasoline, were conducted. Synthesis of the catalysts was initiated with the sulfation of silica (SiO2) material by H2SO4 using the sol-gel method. Ni and/or Mo metal were impregnated into the SO4/SiO2 matrix with concentration variations of 1, 2, and 3 wt%. The sulfation process and promotion by Molybdenum (Mo) metal in the modified catalyst successfully increased the catalytic activity and selectivity. Among the catalysts investigated, Ni-SS2 exhibited the best performance for the hydrocracking reaction with waste frying oil. This catalyst was able to achieve a conversion of the liquid product of 71.47% and a selectivity of 58.73% for the gasoline fraction (C5-C12). NiMo-SS3 showed the highest percentage of activity and selectivity in the hydrocracking of fresh frying oil at 51.50 and 43.22 wt%, respectively.

Highlights

This termine their catalytic activity and selectivity in the conversion of waste frying oil into the mass reduction was due to the release of physically adsorbed water molecules from the gasoline fraction
Diesel Fraction the presence of NiMo metals on the catalyst significantly increased the amount of liquid product
Ni and/or Mo impregnated on sulfated silica was used for the hydrocracking reaction using fresh and waste frying oil

Summary

Introduction

Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Many researchers have concentrated their efforts on developing biofuels from alternative and renewable sources to decrease the dependency on transportation fuels derived from fossil fuels. Biofuels have the potential to contribute toward meeting transportation fuel demand as an alternative fuel. Biofuel can be produced through a thermal and catalytic hydrocracking process. Hydrocracking is a process to convert larger hydrocarbon molecules into smaller molecules by simultaneous or sequential carbon bond breaking and hydrogenation [1]. In the catalytic hydrocracking process, a catalyst is needed

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