Authors: I.Y. Petrov, K.Y. Ushakov, A.V. Osipov, A.R. Bogomolov, B.G. Tryasunov

Title of the article: Co-liquefaction of coal and waste of rubber products

Year: 2022, Issue: 5, Pages: 4-21

Branch of knowledge: 2.6.12. Chemical technology of fuel and high-energy substances

Index UDK: 66.092-977-922:(552.57+621.315.616)

DOI: 10.26730/1999-4125-2022-5-4-21

Abstract: The review discusses some advantages and features of coal and waste rubber products (WRP) co-liquefaction processes. It is noted that in the course of joint conversion of coal and WRP (presented mostly by waste tyres), a noticeable improvement in the liquefaction process performance is observed (an increase in the yield and quality of oils obtained, as well as a decrease in the gas yields). At the same time, in a number of cases, a certain synergism is fixed in the yields of liquefaction products, which is expressed in a higher yield of liquid products formed during joint processing compared to an algebraic sum of these yields obtained from the WRP and coal, which were converted separately under the same conditions. Usually the synergism occurs at the initial stages of the co-liquefaction process, resulting in an increase in an asphaltene yield, which at 400°C is almost twice as much as when processing coal alone under the same conditions. Higher hydrogen content in the waste rubber products facilitates the stabilization of free radicals generated during the thermal decomposition of coals, while pyrolysis oil formed during the WRP thermal decomposition consists mainly of hydroaromatic and aromatic hydrocarbons, which are excellent coal liquefaction solvents.

Key words: coals waste rubber products co-liquefaction conversion oil and gas yields asphaltenes synergism

Receiving date: 15.07.2022

Approval date: 01.10.2022

Publication date: 18.10.2022

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