两种中东减压渣油非等温热转化反应的热重法研究

STUDY ON THE NON-ISOTHERMAL THERMOLYSIS OF TWO MIDDLE EAST VACUUM RESIDUES BY THERMOGRAVIMETRY

采用热重法对科威特减压渣油、沙特混合减压渣油及其四组分的非等温热转化反应及生焦特性进行研究,获得了减压渣油及亚组分热转化行为的基本特征。结果表明:渣油中的饱和分、芳香分对胶质、沥青质热转化反应具有促进作用,沥青质、胶质的热稳定性明显高于饱和分及芳香分。渣油及其四组分的热裂化反应可划分为两个温度区间,每一个温度区间都服从一级动力学反应,两个温度区间的活化能差别较大,各温度区间内不同组分的活化能也不相同。

Thermogravimetry was used to study the non-isothermal thermolysis and coke formation trend of Kuwait and Saudi Arabia vacuum residues,as well as their SARA components.Some basic characteristics of their non-isothermal thermolysis were obtained.It was found that the existence of saturate and aromatic components could promote the thermolysis activities of resin and asphaltene,meanwhile,the thermal stabilities of resin and asphaltene were higher than those of saturate and aromatic components.The non-isothermal thermolysis of Kuwait and Saudi Arabia vacuum residues,and their SARA components could be divided into two temperature ranges,and in each range reactions followed the first-order kinetic model.The activation energies in these two ranges varied significantly;furthermore,the activation energies of the components were different from each other even in the same temperature range.