Relationships between Combustion Behavior in Air and the Chemical Structure of Bituminous Coal during Combustion Processes

Shuxing Qiu, Ramana G. Reddy, Xianyou Huang, Chen Yin and Shengfu Zhang
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Shuxing Qiu: State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, China
Ramana G. Reddy: Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA
Xianyou Huang: State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, China
Chen Yin: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Shengfu Zhang: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

Energies, 2022, vol. 15, issue 14, 1-15

Abstract: The structural parameters of five bituminous coals were analyzed by using X-ray diffraction and attenuated total reflection–Fourier transform infrared spectroscopy. The combustion behavior of coal was investigated by using a thermogravimetric analyzer under air conditions. Furthermore, the relationships between combustion parameters and the coal structure were established. The results show that bituminous coals contain crystalline and amorphous carbon. The aromaticity, interlayer spacing, average stacking height, aliphatic chain length, and the hydrocarbon-generating potential varied with the different bituminous coals. The coal samples exhibited similar weight changes during the combustion process, and the combustion parameters increased with increments in heating rate. The maximum combustion rate and activation energy increased with declining interlayer spacing and hydrocarbon-generating potential and increasing aromaticity, average stacking height, and aliphatic chain length. The bituminous coal for the utilization of combustion should have high aromaticity, a degree of graphitization, crystalline, long aliphatic chain length, and weak hydrocarbon-generating potential.

Keywords: bituminous coals; combustion behavior; carbon structure; functional groups; activation energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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