Direct liquefaction behavior of Shenhua coal under CO containing atmosphere

TANG Bowen; ZHANG Rui; LIU Haiyun; JIN Lijun; HU Haoquan

doi:10.1016/S1872-5813(24)60451-2

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TANG Bowen, ZHANG Rui, LIU Haiyun, JIN Lijun, HU Haoquan. Direct liquefaction behavior of Shenhua coal under CO containing atmosphere[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(24)60451-2

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TANG Bowen, ZHANG Rui, LIU Haiyun, JIN Lijun, HU Haoquan. Direct liquefaction behavior of Shenhua coal under CO containing atmosphere[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(24)60451-2

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Direct liquefaction behavior of Shenhua coal under CO containing atmosphere

doi: 10.1016/S1872-5813(24)60451-2

Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China

Funds: The project was supported by China Shenhua Coal to Liquid and Chemical Co, LTD (MZYHG-22-02), and National Key Research and Development Program of China (2022YFB4101302).

Received Date: 2024-03-08
Accepted Date: 2024-04-09
Rev Recd Date: 2024-04-09

Available Online: 2024-04-29

Abstract

Abstract

Direct coal liquefaction (DCL) under CO or syngas atmosphere is beneficial to reduce the cost of hydrogen production. In this paper, the effects of CO on the liquefaction process of Shangwan coal were investigated by comparing the liquefaction behavior in three atmospheres of CO, H_2, and N₂. Then, the effects of different CO/H₂ ratios and catalysts on the liquefaction process in syngas were investigated. The results indicated that the oil yield under the CO atmosphere reached 43.1%, which was 4.2% lower than that under H₂, but 10.2% higher than that under N₂. The liquefaction performance was further improved by adding the Shenhua 863 catalyst. It is analyzed that CO promoted liquefaction in two ways: water-gas shift reaction and the reaction between CO and organic structures of coal. Through the characterization of the products by GC-MS and FI-TR, it was found that CO makes the benzenes, aliphatics, and oxygen-containing compounds in liquefied oil simultaneously increased, the effect on functional groups and free radicals concentration in the solid products was not obvious. The experimental results under syngas showed that the highest oil yield, 57.4%, can be obtained in DCL with 20%CO syngas, and further improved by increasing the moisture content of coal appropriately. In addition, it was found that the Shenhua 863 catalyst has a good catalytic effect on the liquefaction process and also water-gas shift reaction. The research work provides a theoretical basis for the direct liquefaction of coal under syngas.
- Direct coal liquefaction,
- hydrogen-rich atmosphere,
- syngas,
- water-gas shift reaction

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References(45)

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