稀土金属改性对负载型Ni2P/M41催化剂加氢脱硫活性的影响
Influence of rare earth metal modification on hydrodesulfurization activity of supported Ni2P/M41 catalysts
姜楠 1蒋博龙 1王帅 2宋华2
作者信息
- 1. 青岛理工大学滨海人居环境学术创新中心,山东青岛 266000
- 2. 东北石油大学化学化工学院,黑龙江大庆 163000
- 折叠
摘要
开发高效加氢脱硫催化剂是实现油品深度脱硫的重要途径.采用浸渍-程序升温法制备不同稀土金属(La、Ce、Pr、Nd、Y)改性的Ni2P/M41 催化剂.通过X射线衍射、N2吸附-脱附、CO吸附和X射线光电子能谱技术分析催化剂的结构以及化学组成,并以二苯并噻吩为模型化合物,考察稀土金属对Ni2P/M41 催化剂加氢脱硫性能的影响.结果表明:稀土金属可以不同程度地影响催化剂的尺寸以及活性相Ni2P在载体表面的分散性;稀土金属La、Pr能够显著提高负载型Ni2P/M41 催化剂的HDS(加氢脱硫)活性,加入稀土金属Nd、Ce和Y反而使催化剂活性略有降低;Pr-Ni2P/M41 表现出最优的加氢脱硫能力,反应 6h后,脱硫率达到92.6％,与未改性的Ni2P/M41 催化剂的转化率相比,提高 15.1％.
Abstract
It is an important way to achieve deep desulfurization of oil products for the development of efficient hydrodesulfu-rization(HDS)catalysts.A series of rare earth metals(Nd,La,Ce,Pr,Y)modified nickel phosphide catalysts(X-Ni2P/M41)were prepared by a temperature programmed reduction method.The structure and chemical composition of catalysts were analysed by X-ray diffraction(XRD),N2 adsorption-desorption,CO uptake and X-ray photoelectron spectroscopy(XPS).The effect of rare earth metals on the hydrodesulfurization performance of Ni2P/M41 catalyst was investigated by u-sing dibenzothiophene as a model compound.The results show that the rare earth metals can affect the distribution of Ni2P crystalline on the surface of M41 and promote the formation of the active Ni2P crystalline phase at different levels.La and Pr can significantly increase the HDS activity of supported Ni2P/M41 catalysts,while the addition of Nd,Ce,and Y could slightly reduces its activity.Especially,Pr-Ni2P/M41 presents the optimal HDS preformance.After 6h of reaction,its des-ulfurization conversion reaches 92.6％,which is 15.1％higher than that of the unmodified Ni2P/M41 catalyst.
关键词
加氢脱硫/改性/稀土金属/负载型催化剂Key words
hydrodesulfurization/modification/rare earth metals/supported catalyst引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据