Title: NiW/USY-γ-Al₂O₃ modified by P, Zr and Mn for hydrogenation of coal tar to clean fuel

Authors: Zegang Qiu; Shaobo Ma; Zenghui Zhang; Zhiqin Li; Liang Ding; Liangfu Zhao

Addresses: College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China ' College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China ' Goertek Company, Weifang, 261031, China ' College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China ' College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China ' Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Abstract: NiW/USY-γ-Al₂O₃ catalysts modified by P, Zr and Mn were prepared by incipient wetness co-impregnation method. The addition of P significantly elevated the acid strength and the content of medium-strong acids, while the addition of Zr decreased the content of the medium-strong acids. The addition of Mn almost did not change the acidity of the catalyst. All catalysts were evaluated by using the diesel fraction from the hydrotreated coal tar and the naphthalene as feedstock. P, Mn and Zr modification all improved the overall hydrocracking activity of catalysts. The catalytic activity of P-NiW/USY-γ-Al₂O₃ and Mn-NiW/USY-γ-Al₂O₃ for hydrocracking of polycyclic aromatic hydrocarbons was higher than that of NiW/USY-γ-Al₂O₃ and Zr-NiW/USY-γ-Al₂O₃. Disparate hydrogenation or cracking activity of modified catalysts was observed. [Received: August 4, 2020; Accepted: January 6, 2021]

Keywords: coal tar; catalyst; hydrocracking; hydrogenation; alumina; clean fuel; nickel; tungsten; Y-zeolite; modification.

DOI: 10.1504/IJOGCT.2022.120323

International Journal of Oil, Gas and Coal Technology, 2022 Vol.29 No.2, pp.193 - 208

Received: 03 Aug 2020
Accepted: 06 Jan 2021
Published online: 14 Jan 2022 *

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