四氢萘选择性催化裂化反应动力学

摘要

在消除了内外扩散影响的小型固定流化床反应器中,考察了四氢萘在选择性催化裂化(HSCC)催化剂上,在470～515℃发生环烷环开环反应以及脱氢缩合反应的动力学规律.在四氢萘催化裂化反应途径的基础上,建立了四氢萘裂化双曲线型Langmuir-Hinshelwood(L-H)型五集总动力学模型,其中四氢萘环烷环开环反应活化能为56.06 kJ/mol,而其脱氢缩合反应活化能为52.57 kJ/mol.残差检验和统计检验结果表明,所得动力学模型合理、可靠,能够真实反映四氢萘选择性催化裂化反应特性.%The kinetics study of tetrahydronaphthalene ring opening and dehydrogenation-condensation reactions over highly selective catalytic cracking(HSCC)catalyst in a temperature range of 470-515 ℃ in a small fixed fluidized bed(FFB)without internal and external diffusion effect was conducted.On the basis of cracking reaction pathway of tetrahydronaphthalene,a five-lumping Langmuir-Hinshelwood(L-H)type hyperbolic curve kinetic model for describing the tetrahydronaphthalene catalytic cracking was developed.The activation energy of the naphthenic ring opening reaction of tetrahydronaphthalene is 56.06 kJ/mol,and dehydrogenation condensation reaction is 52.57 kJ/mol.Residual error inspection and statistical test showed that the established model is acceptable and reliable,and can actually reflect the characters of the tetrahydronaphthalene catalytic cracking.