Title: Analysis of distillate product in the direct coal liquefaction of a Chinese bituminous coal

Authors: Rui-Li Tong; Hai-Yong Zhang; Xiong-Chao Lin; Yong-Gang Wang; Xiang-Kun Meng

Addresses: National Institute of Clean-and-Low-Carbon Energy, P.O. Box 001 Shenhua NICE, Future Science and Technology City, Changping District, 102211, Beijing, China; Faculty of Science, Beijing University of Chemical Technology, 100029, Beijing, China ' School of Chemical and Environmental Engineering, China University of Mining and Technology, 100083, Beijing, China ' School of Chemical and Environmental Engineering, China University of Mining and Technology, 100083, Beijing, China ' School of Chemical and Environmental Engineering, China University of Mining and Technology, 100083, Beijing, China ' National Institute of Clean-and-Low-Carbon Energy, P.O. Box 001 Shenhua NICE, Future Science and Technology City, Changping District, 102211, Beijing, China

Abstract: To understand the reaction mechanism of coal liquefaction process and further improve the direct coal liquefaction (DCL) technology, a certain kind of DCL oil, which was prepared from a Chinese bituminous Yulin coal, was first separated into different fractions using improved silica-gel column chromatography (SGCC) coupled with the UV-absorbance detector, and then identified by gas chromatography-mass spectrometer (GC-MS), the comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometer (GC × GC-TOFMS), ¹H NMR and FTIR. Around 95% of DCL oil was successfully separated into seven fractions by four mobile phases and analysed. It was found that DCL oil consists of 9.06% of alkanes, 36.32% of hydroaromatics, 17.85% of aromatics, 15.39% of oxygen-containing compounds, 16.21% of nitrogen-containing compounds and 2.33% of polyheteroatomic compounds, respectively. [Received: August 22, 2017; Accepted: March 1, 2018]

Keywords: bituminous coal; direct coal liquefaction; DCL; distillate product; oil; SGCC; silica-gel column chromatography; GC × GC-TOFMS.

DOI: 10.1504/IJOGCT.2020.105772

International Journal of Oil, Gas and Coal Technology, 2020 Vol.23 No.3, pp.375 - 394

Received: 22 Aug 2017
Accepted: 01 Mar 2018
Published online: 13 Mar 2020 *

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