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本论文采用核磁共振光谱（NMR）研究了ZSM-22/ZSM-23共结晶分子筛负载贵金属制备的催化剂的加氢异构反应性能，通过200SN脱蜡油、650SN糠醛精制油和加氢裂化尾油三种原料油加氢异构反应前后油品的结构特征和结构参数变化与倾点、粘度指数宏观性质相关联可知：加氢异构反应后，基础油产品的支化度都有不同程度的增大，正构烷烃含量降低，异构烷烃含量增加，基础油的倾点和粘度指数也随之降低，但是基础油产品的平均链长变化较少，表明了ZSM-22/ZSM-23共结晶分子筛负载贵金属制备的催化剂有较好的加氢异构性能。与Pt/ZSM-22和Pt/ZSM-23催化剂相比较，在弱酸性的Pt/ZSM-22/ZSM-23催化剂上650SN糠醛精制油经加氢异构反应得到的产品中异构烃含量较多，平均链长较大，Pt/ZSM-22/ZSM-23催化剂表现出了较好的加氢异构性能。 The hydroisomerization performance of ZSM-22/ZSM-23 which loaded noble metal was studied by NMR. According to the variety of strcture characters and structure index, and associated with macroscopic properties such as pour point and viscosity index for 200SN, 650SN, hydrocracking tail oil and their isomerization products, it shown the branch degree of lube base oil products increased in varying degrees, normal paraffin content decreased, and the isoparaffin content increased after hydroisomerization reaction, so the pour point and viscosity index of base oil also decreased, but the average chain length changed little. Compared with the Pt/ZSM-22 and Pt/ZSM-23 catalyst, 650SN furfural refined oil after hydroisomerization on Pt/ZSM-22/ZSM-23 catalyst which had weaker acidity, the products had more isoparaffin, and longer average chain length, which indicated that Pt/ZSM-22/ZSM-23 has better hydroisomerization performance. |
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| The hydroisomerization performance of the catalyst of ZSM-22/ZSM-23 cocrystallization molecules loaded onto noble metal was studied through nuclear magentic resonance spectroscopy (NMR). By associating the change of strcture characters and structure index of oils before and after hydroisomerization reactions with macroscopic properties including pour point and viscosity index of 200SN, 650SN, hydrocracking tail oil and their corresponding isomerization products, it can be known that the branch degree of lube base oil products increased to various extents, the content of normal paraffin decreased, and the content of isoparaffin increased after hydroisomerization reaction, and thus the pour point and viscosity index of base oil also decreased while the average chain length changed little. Compared with on Pt/ZSM-22 and Pt/ZSM-23 catalysts, the products of 650SN furfural refined oil after hydroisomerization on the Pt/ZSM-22/ZSM-23 catalyst with weak acidity had more isoparaffin, and longer average chain length. It indicated better hydroisomerization performance of Pt/ZSM-22/ZSM-23 than that of Pt/ZSM-22 and Pt/ZSM-23 catalysts. |
2楼2012-05-03 08:48:51