Thermogravimetric kinetics on catalytic combustion of bituminous coal |
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| Affiliation: | 1. School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China;2. Department of Environmental Engineering, Bolu Abant Izzet Baysal University, Bolu, 4052, Turkey;1. School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, PR China;2. State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, Yinchuan, 750021, PR China;3. College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China;4. Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China;1. Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China;2. Qilu University of Technology (Shandong Academy of Sciences), Ecology Institute of Shandong Academy of Sciences, Shandong Province Key Laboratory of Applied Microbiology, Jinan 250014, China;1. Tomsk Polytechnic University, 30, Lenin Prospekt, Tomsk 634050, Russia;2. Nürnberg Technical University Georg-Simon-Ohm, 12, Keβlerplatz, 90489 Nürnberg, Germany |
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| Abstract: | The catalytic combustion and non-isothermal kinetics of bituminous coal by CeO2, Fe2O3, and NiO were investigated. The exothermic characteristics during catalytic combustion of bituminous coal were determined. Based on the Coats-Redfern method by introducing the function of kinetics mechanisms, the activation energies and pre-exponential factors of catalytic combustion of bituminous coal were estimated iteratively by regression. It is found that the catalysts promoted the transport of oxygen to the coal or char surface and effectively improved the combustion characteristics of bituminous coal. Under the same experimental conditions, the exothermic values were significantly increased and the catalysts of composite oxides exhibited higher exothermic values than pure metal oxide catalysts. The metal oxides significantly reduced the activation energies of bituminous coal combustion. SEM analysis presented that combustion residues became more porous with the addition of the catalyst. |
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| Keywords: | Bituminous coal TGA-DSC Catalytic combustion Thermogravimetric kinetics |
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