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| Thermal cracking dynamics and product distribution of coal-based endothermic hydrocarbon fuels |
| Shang Jianxuan1, Yu Chun2, Wang Chong3, Du Chongpeng3, He Zengzhi3, Cui Louwei4,
Zhu Yonghong5, Li Dong3 |
| 1. Shaanxi Coal and Chemical Industry Group Corporation Ltd., Xi'an 710100, China; 2. Xi'an Aerospace Source Power Engineering Corporation Ltd., Xi'an 710100, China; 3. School of Chemical Engineering, Northwestern University, Xi'an 710069, China;4. Northwest Chemical Research Institute Corporation Ltd., Xi'an 710601, China; 5. Research Center for Efficient Hydrocarbon Utilization Technology of Shaanxi Yanchang Petroleum (Group) Corporation Ltd., Xi'an 710000, China |
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Abstract In order to study the law of thermal cracking and transformation of coal-based endothermic hydrocarbon fuels at high temperatures, this work discussed the gas yield and cracking reaction dynamics of the fuel at 450~490℃ through static thermal cracking experiments, and used gas chromatography (GC) and gas chromatography-mass spectrometer (GC-MS) to analyze the composition distribution of gas and liquid products. The results show that the thermal cracking starting temperature of coal-based hydrocarbon fuels is high, the coking tendency is low, and the thermal cracking stability is strong. Gaseous products include hydrogen, methane, ethane, ethylene, propane, propylene, butane and butene; liquid products long-chain alkanes are cleaved into short-chain alkanes, and cycloalkanes are converted into aromatic compounds such as naphthalene, benzene, and indene. The pyrolysis kinetic reaction conforms to the primary kinetic equation, the fuel pyrolysis rate constant is 2.8310-5 ~ 1.5410-4s-1, the activation energy Ea=205.5612.3 kJmol-1, and the precursor factor lnA=23.692.0.
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