煤基吸热型碳氢燃料热裂解动力学及产物分布  

Thermal cracking dynamics and product distribution of coal-based endothermic hydrocarbon fuels

作　　者：尚建选 余春 王冲 杜崇鹏 何增智 崔楼伟 朱永红 李冬[3] Shang Jianxuan;Yu Chun;Wang Chong;Du Chongpeng;He Zengzhi;Cui Louwei;Zhu Yonghong;Li Dong(Shaanxi Coal and Chemical Industry Group Corporation Ltd.,Xi'an 710100,China;Xi'an Aerospace Source Power Engineering CorporationLtd.,Xi'an 710100,China;School of Chemical Engineering,Northwestern University,Xi'an710069,China;Northwest Chemical Research Institute Corporation Ltd.,Xi'an 710601,China;Research Center for Efficient Hydrocarbon Utilization Technology of Shaanxi Yanchang Petroleum(Group)Corporation Ltd.,Xi'an710000,China)

机构地区：[1]陕西煤业化工集团有限责任公司,陕西西安710100 [2]西安航天源动力工程有限公司,陕西西安710100 [3]西北大学化工学院,陕西西安710069 [4]西北化工研究院有限公司,陕西西安710601 [5]陕西延长石油(集团)有限责任公司碳氢高效利用技术研究中心,陕西西安710000

出　　处：《煤炭与化工》2023年第8期144-149,共6页Coal and Chemical Industry

摘　　要：为了研究煤基吸热型碳氢燃料在高温下的热裂解转化规律,通过静态热裂解实验探讨了燃料在450~490℃的条件下的气体产率和裂解反应动力学,利用气相色谱(GC)和气相色谱-质谱联用仪(GC-MS)分析了气体和液体产物组成分布。结果表明,煤基碳氢燃料的热裂解起始温度高,结焦倾向低,热裂解稳定性强。气体产物包括氢气、甲烷、乙烷、乙烯、丙烷、丙烯、丁烷和丁烯;液体产物长链烷烃裂解为短链烷烃,环烷烃转化为萘、苯、茚等芳香族化合物。热裂解动力学反应符合一级动力学方程,燃料热裂解速率常数为2.83×10^(-5)~1.54×10^(-4)s^(-1),活化能Ea=205.561±2.3 kJ·mol^(-1),指前因子lnA=23.69±2.0。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 2.83×10^(-5)~1.54×10^(-4)s^(-1),the activation energy Ea=205.56±12.3 kJ·mol^(-1),and the precursor factor lnA=23.69±2.0.

关 键 词：煤基吸热型碳氢燃料 煤焦油 热裂解 动力学 产物分布 再生冷却 

分 类 号：O643.1[理学—物理化学]