摘要
以质量分数为0.8%的二苯并噻吩(DBT)的十氢萘溶液为模型化合物,考察了全硅MCM-41担载的CoMo、NiMo以及CoNiMo硫化物催化剂的加氢脱硫(HDS)反应性能。结果表明,DBT在NiMo/MCM-41催化剂上主要通过加氢反应路径脱硫,而在CoMo/MCM-41和CoNiMo/MCM-41催化剂上主要通过直接脱硫反应路径脱硫。NiMo/MCM-41催化剂的HDS活性远高于CoMo/MCM-41或CoNiMo/MCM-41催化剂。CoNiMo/MCM-41催化剂反应性能与CoMo/MCM-41催化剂相似,没有观察到明显的双助剂效应。根据紫外-可见漫反射光谱(UV-Vis)的测定结果,Co与Mo之间的相互作用比Ni与Mo之间的相互作用强,在CoNiMo/MCM-41催化剂中Co会优先与Mo结合,形成与CoMo/MCM-41催化剂中类似的活性相,表现出与CoMo/MCM-41催化剂相似的催化特性。
The hydrodesulfurizations （HDS） of dibenzothiophene （DBT） catalyzed by siliceous MCM-41 supported NiMo, CoMo and CoNiMo sulfides were studied by using a modal fuel containing 0.8% mass fraction of DBT in decalin. The results indicated that the HDS of DBT over NiMo/MCM-41 occurred mainly through hydrogenation pathway, whereas the desulfurization of DBT predominately took the pathway of direct desulfurization over CoMo/MCM-41 and CoNiMo/ MCM-41. The HDS activity of NiMo/MCM-41 was much higher than that of CoMo/MCM-41 or CoNiMo/MCM-41. CoNiMo/MCM-41 exhibited similar HDS performance to CoMo/MCM-41, and no dual promoting effect was observed for CoNiMo/MCM-41. The UV-Vis results suggested that interaction between Co and Mo was stronger than that between Ni and Mo. Therefore, Mo prefers to react with Co in CoNiMo/MCM-41, leading to the formation of the active sites similar to those in CoMo/MCM-41, and finally resulting in the similar catalytic behavior of CoNiMo/MCM-41 to CoMo/MCM-41.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2008年第5期491-495,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金重点基金(20333030)
国家自然科学基金青年基金(20503003)
辽宁省中青年学科带头人
教育部博士点专项基金(20030141026)
CNPC中青年创新基金项目资助
