摘要
将热重天平改装成可连续测量石油烃水蒸汽热裂解结焦速度的流动积分反应装置。研究了柴油结焦速度与温度、烃分压和动力学裂解深度的关系及小试与工业炉的结焦过程,建立了结焦动力学方程。结果表明,同小试一样,工业炉的结焦反应也为反应动力学控制。结焦速度和结焦母体随裂解深度的变化表明,原料中带支链的芳烃和二次反应中生成的“聚合物”是活性很高的结焦母体。
With equipment specially designed and assembled for studying coke depositionin pyrolysis of hydrocarbons,kinetics of coke deposition during gas oil pyrolysis wasstudied at temperatures of 1033—1173K,KSF of 0.6—4 and under hydrocarbonpartial pressure of 0.2—0.7atm.The effect of run time on coking rates showedthat kinetics of coking reaction was a limiting step in coking.An activation ener-gy of coke formation of 142 kJ/mol was consistent with an activation energy ofcommercial pyrolysis furnaces of 151 kJ/mol.This showed that kinetics of cokingreaction was also a limiting step in coking in commercial pyrolysis furnaces.Existence of a minimum coking rate with KSF,and composition of pyrolysisproduct showed that gas oil with multi-alkyl substituted aromatics in gas oil werehighly active coking precursors.
出处
《石油化工》
CAS
CSCD
北大核心
1990年第3期143-147,共5页
Petrochemical Technology
