Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10239083 | Applied Catalysis A: General | 2005 | 8 Pages |
Abstract
The HDS of DBT as a reference probe molecule is thought to proceed first through direct desulfurization pathways, then to hydrogenolysis. A significant amount of benzene was detected in the case of CoMoP/zeolite-Al2O3. The HDS of 4,6-DMDBT over CoMoP/zeolite-Al2O3 in the absence of quinoline proceeds through a very complex mechanism that involves several other reactions, such as isomerization, alkylation, and hydrocracking. This can probably be attributed to the acidic properties of zeolite. In the presence of quinoline, a strong inhibition effect was observed for all the catalysts. The inhibition effects of quinoline on CoMoP/Al2O3-Li were smaller than its effects on the other catalysts; this fact resulted in the enhancement of HDS activity. Moreover, from the XPS investigations we can conclude that CoMoP/Al2O3-Li showed a relatively higher sulfidation degree for both Mo and Co. Thus, it seems to have a relatively higher catalytic activity.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Hiroshi Mizutani, Hideki Godo, Takayuki Ohsaki, Yoshinori Kato, Takashi Fujikawa, Youssef Saih, Takako Funamoto, Kohichi Segawa,