Authors: I.Y. Petrov, K.Y. Ushakov, A.R. Bogomolov, Tryasunov

Title of the article: Catalytic liquefaction of coals - a promising way to produce motor fuels and valuable chemical compounds. Part 1. Principal methods of coal liquefation

Year: 2020, Issue: 5, Pages: 20-32

Branch of knowledge: 05.17.07 Chemical technology of fuel and high-energy substances

Index UDK: (66.092.094.25.097+66.061):552.57

DOI: 10.26730/1999-4125-2020-5-20-32

Abstract: This review briefly discusses the main directions and methods for coal conversion into liquid products (pyrolysis, solvent extraction, indirect and direct liquefaction). The main characteristics of direct (DCL) and indirect (ICL) coal liquefactions are compared. The advantages, disadvantages and need to develop and improve the technologies of direct coal liquefaction in the medium term are noticed. Prospects for industrial implementation of direct coal liquefaction processes are confirmed by the successful operation for more than 10 years of the Shenhua Group demonstration plant in Ordos (Inner Mongolia, China) with a capacity of about 1 million tons of coal/year. At the same time, it is emphasized that, despite the higher thermal efficiency and encouraging economic indicators, liquid fractions distilled from coal conversion products in DCL processes, as a rule, require additional purification from sulfur, nitrogen and aromatics impurities before they can be used as commercial motor fuels or as feedstocks for obtaining valuable chemical compounds.

Key words: coals pyrolysis extraction indirect coal liquefaction direct coal liquefaction hydrogen donor solvent hydrotreatment

Receiving date: 24.11.2020

Publication date: 23.12.2020

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