常压渣油加氢反应产物体系的胶体稳定性

Colloidal stability of atmospheric residue hydrotreating production

在高温高压反应釜内,使用加氢转化催化剂对绥中36-1常压渣油进行加氢反应。通过分析产物的SARA四组分组成、数均相对分子质量及沥青质的平均结构和溶解度参数考察反应后体系胶体的稳定性。结果表明:反应温度升高,体系的稳定性逐渐变差,产物的SARA四组分中饱和分与沥青质的总含量增大,芳香分与胶质的含量降低;组分的数均相对分子质量减小,组成的改变影响产物的胶体稳定性;沥青质平均分子结构中环烷碳率、烷基碳率降低,芳香碳率增大,缩合度参数变小,沥青性质变差;沥青质平均分子结构中溶解度参数增大,分子间作用增大;组分组成及平均结构的变化导致反应后体系的胶体稳定性变差。

Suizhong36-1 atmospheric residue was hydrotreated in an autoclave using hydrotreating catalyst at different reaction temperature. The SARA composition, the mean relative molecular mass and the average structure parameters and solubility parameter of asphaltene were analyzed to investigate the colloidal stability. The results show that the colloidal stability reduces with the reaction temperature increasing. The contents of asphaltene and saturate increase, aromatic and resin contents decrease. The mean relative molecular mass of SARA composition decreases, especially resin. The fraction of aromatic carbon increases, the fraction of cycloparaffinic carbon and paraffinie carbon and condensed parameter decrease. Solubility parameter and the force of inter-molecular increase. The variations of SARA composition, the mean relative molecular mass and asphaltene average structure lead to the change of colloidal stability.