摘要
通过程序升温还原磷钼酸盐前体的方法制备了无负载和负载型磷化钼催化剂,并采用TG-DTG,XRD和BET技术对催化剂进行表征。采用高压连续微反装置,以二苯并噻吩、喹啉的混合体系为模型化合物考察了MoP,MoP/γ-Al2O3,CoMoP/γ-Al2O3催化剂的加氢脱硫和加氢脱氮活性,反应温度为340℃,反应压力为3.0MPa。结果表明,合成的无负载和负载型磷化钼催化剂表面均出现活性组分MoP的特征衍射峰;负载后催化剂的比表面积为74.4 m2/g;3种磷化钼催化剂的程序升温还原过程均出现明显的失重过程,MoP/γ-Al2O3前体开始还原转化的温度约为509℃。CoMoP/γ-Al2O3催化剂的HDS活性在适当反应条件下可达98.54%;当模型化合物中硫氮含量大幅提高时,催化剂的活性并未明显降低。
A series of unsupported and supported molybdenum phosphide catalysts were prepared by temperature programmed reduction process. Then these prepared catalysts were characterized by means of TG- DTG, XRD and BET technique. The catalytic activities for hydrodesulfurization of dibenzothiophene and hydrodenitrogenation of quinoline were measured in a continuous microreactor at 340 ℃and 3.0 MPa. MoP, MOP/γ - Al2O3 and CoMoP/γ - Al2O3 are catalysts in this process. The results show that unsupported and supported catalysts are prepared successfully and the diffraction peaks of MoP are observed on the surface of all prepared catalysts. The ratio surface areas of supported MoP catalysts are 74.4 m^2/g. Through TG- DTG analysis, it is found that obvious weight losses occur in tcmperature programmed reduction process of three MoP catalysts. The invert temperature of MOP/γ - Al2O3 is 509 ℃. And the conversion of dibenzothiophene of CoMoP/γ - Al2O3 can reach to 98.54% at suitable conditions through investigation of catalytic activity. As the concentration of S and N in model oil increases, the activities of catalysts have a little decline.
出处
《石油化工高等学校学报》
EI
CAS
2006年第2期1-4,共4页
Journal of Petrochemical Universities
基金
国家自然基金项目(20273011)
国家重大基础研究项目(G2000048003)。
关键词
加氢脱硫
加氢脱氮
磷化钼
二苯并噻吩
喹啉
Hydrodesulfurization
Hydrodenitrogenation
Molybdenum phosphide
Dibenzothiophene
Quinoline