不同添加物对渣油加氢反应性能的影响

通过在渣油加氢处理原料中添加具有不同性质官能团的组分，考察添加物对渣油加氢反应产物分布的影响。结果表明，添加物对渣油加氢反应性能影响效果的差别主要体现在轻油和大于500 ℃残渣收率上。添加具有酸性官能团的十二烷基苯磺酸的效果最好，在焦炭产率略有增加的同时其轻油收率及渣油转化率均有所提高；添加油酸的效果次之；而添加同样具有酸性官能团的对叔丁基邻苯二酚以及具有碱性官能团的脂肪胺时对反应基本没有正面效果；添加具有中性基团的聚山梨酯-80时，除产物中焦炭产率稍有增加外，轻油收率以及渣油转化率均有所降低。添加物对渣油加氢反应的影响主要是通过改变沥青质的存在状态、增加沥青质的溶解性和胶体稳定性来实现的。

INFLUENCE OF VARIOUS ADDITIVES ON THE REACTION PERFORMANCE OF RESIDUE HYDROTREATING

The influence of additives on the product distribution of residue hydrotreating process was studied by adding additives having various functional groups into residue feedstock.Test results showed that the influences of different additives on the hydrotreating reaction performance were mainly embodied on the yields of light oil and resid(>500 ℃).Adding dodecyl benzene sulfonic acid(DBSA) with acidic functional groups exhibited the best positive effect: the light oil yield and residue conversion increased significantly as compared with base case,coke yield increased slightly;followed by oleic acid.However,adding p-tert-butyl catechol(TBC) with acidic functional groups and fatty amine with basic functional groups showed little positive effect.When adding polysorbate-80 with neutral groups,negative effects,such as higher coke yield,lower light oil yield and less residue conversion were observed.These phenomena should be attributed to the changing of asphaltene existing state in the residue feedstock,the increase of asphaltene solubility and colloid stability by adding additives.