Magnetically recyclable catalyst Ni/HZSM-5@SiO2@Fe3O4 for hydrodeoxygenation of 4-ethylphenol into high heat sink aviation fuel of ethylcyclohexane

Bingshuo Li, Aorong Ding, Tianhua Yang, Zhuo Wang, Haijun Zhang, Xingping Kai and Rundong Li

Energy, 2024, vol. 309, issue C

Abstract: Hydrodeoxygenation (HDO) of phenols has significant potential for the synthesis of cycloalkane. In this study, a Ni-based magnetic molecular sieve catalyst, Ni/HZSM-5@SiO2@Fe3O4, was carefully prepared and systematically characterized using various analytical methods. A screening of the HDO reaction conditions was carried out using a typical phenolic compound of 4-ethylphenol. Under the optimal reaction conditions (240 °C, 3 h) with n-dodecane as the solvent, the 6 % Ni/HZSM-5@SiO2@Fe3O4 catalyst showed excellent performance, achieving a 4-ethylphenol conversion of 59.3 % and an ethylcyclohexane selectivity of 85.1 %. In comparison to conventional Ni/HZSM-5, the magnetic micromesoporous molecular sieve catalyst exhibited superior catalytic activity, alkane selectivity and recyclability, with a catalyst recovery ratio of 95 %. Furthermore, the effect of liquid-solid mass transfer efficiency on the ethylcyclohexane selectivity considering of the stirring speed was studied, and the selectivity was increased from 81.6 to 85.1 % when the speed was increased from 400 to 600 rpm. This finding was further substantiated by Fluent numerical simulation. To elucidate the HDO pathway of 4-ethylphenol on Ni/HZSM-5@SiO2@Fe3O4, a comprehensive reaction pathway was proposed, providing insights into the catalytic mechanism.

Keywords: Hydrodeoxygenation; Fluent simulation; 4-Ethylphenol; Magnetic Ni/HZSM-5@SiO2@Fe3O4; Ethylcyclohexane (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:309:y:2024:i:c:s0360544224028925

DOI: 10.1016/j.energy.2024.133117

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