ORIGINAL RESEARCH
Study on Cr2O3/γ-Al2O3 Catalysts for Mixed Pyrolysis of Coal to Produce Hydrogen-Rich Fuel Gas
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Li Yue 1
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1
Shaanxi Coal Geological Laboratory Co.,Ltd., Xi’an, 710054, China
2
Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi’an, 710021, China
3
Xi’an University of Science and Technology, Xi’an, 710054, China
CORRESPONDING AUTHOR
Chen Jihao   

Shaanxi Coal Geological Laboratory Co.,Ltd, 457 710054, Xi`an, China
Submission date: 2021-03-04
Final revision date: 2021-04-02
Acceptance date: 2021-04-13
Online publication date: 2021-12-16
Publication date: 2022-01-28
 
Pol. J. Environ. Stud. 2022;31(1):701–711
 
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ABSTRACT
γ-Al2O3 was used as the carrier, the group VIII metal oxides and the sub group metal oxides were used as active components, and the γ-Al2O3 catalysts were prepared by the equal volume impregnation method. Hydrogen rich fuel gas and tar products were produced by the mixed pyrolysis of coal and catalysts in a furnace. The influence of γ-Al2O3 catalysts with different loading Cr2O3 on the mixed pyrolysis products of coal was studied. The catalyst was characterized by ICP-MS, XRD and BET, and the pyrolysis mechanism of coal and catalyst was studied. The results showed that: 1) The tar and gas of coal pyrolysis were 0.32g and 1.58g, respectively, and the highest total contents of CO, H2 and CH4 were 71.40% respectively. 2) Fe2O3/γ-Al2O3 catalyst made the highest tar of 0.75g, which was 16.4% higher than that of coal; Cr2O3/γ-Al2O3 catalyst made the highest gas of 1.73g, which was 9.5% higher than that of raw coal. 3) The Cr2O3/γ-Al2O3 catalyst prepared by loading 1% Cr2O3 had better catalytic effect. 4) The the specific surface areas of Cr2O3/γ-Al2O3 and γ-Al2O3 were similar, while the catalytic cracking effect of Cr2O3/γ-Al2O3 was more obvious than that of γ-Al2O3, so Cr2O3 improved the catalytic activity.
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ISSN:1230-1485