稠油催化改质降粘实验研究

Experimental Study on Viscosity Reduction of Heavy Oil by Catalytic Upgrading

以油酸、钼盐为原料合成出催化剂油酸钼,通过室内降粘实验,研究了供氢剂四氢萘的作用、催化剂添加量、反应温度以及反应时间对稠油降粘率的影响,确定了最佳反应条件:催化剂添加量为0.8 wt%,反应温度为240?C,反应时间为18 h,此时稠油降粘率为65.87%.四组分分析发现,反应后胶质、沥青质含量减少,饱和分、芳香分含量增加.通过气相色谱、元素分析及红外光谱分析了稠油反应前后裂解气组成、元素含量及四组分结构变化情况,探讨了稠油降粘原因.最后,分析了处理后油样放置一段时间后粘度发生变化的原因.

Molybdenum oleate was synthesized from oleic acid and ammonium molybdate.The effects of the hydrogen donor of tetralin,the catalyst dosage,reaction temperature and reaction time on viscosity reduction of heavy oil were studied.The optimum reaction conditions were determined as follows:the amount of catalyst was 0.8 wt%,the reaction temperature was 240?C,the reaction time was 18 h,and the viscosity reduction rate of heavy oil was 65.87%.The four components analysis showed that the content of asphaltene and resin decreased,however,the content of saturate and aromatic increased after reaction.Gas chromatography,elemental analysis and infrared spectroscopy were used to analyze the changes of cracking gas composition,elemental content and four-component structure before and after heavy oil reaction,and the reasons for viscosity reduction of heavy oil were discussed.Finally,the reason of viscosity change in oil sample after a period of time was analyzed.