Chen Chun-Liang, Lin Shiow-Shyung, Liu Tuan-Chi
a Department of Chemical Engineering , Southern Taiwan University of Technology , Tainan , Taiwan , 717 , ROC.
b Department of Environmental Engineering and Health , Chia-Nan University of Pharmacy and Science , Tainan , Taiwan , 717 , ROC.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2002;37(6):1147-1157. doi: 10.1081/ESE-120004529.
The purpose of this research was to study the effects of preparation conditions on the catalytic properties of the Co-Mo/γ-AlO catalyst. The work included catalyst preparations and reactions. In the preparations, cobalt-impregnated Mo/γ-AlO (designated as IcIM) was found to have a promoting effect on the hydrodesulfurization (HDS) of thiophene. Activity and stability of IcIM was higher than that of Mo/γ-AlO. Conversely, when cobalt was added onto Mo/γ-AlO by the mechanical mixing method, no promoting effect was observed. Mo/γ-AlO was also prepared using the two different methods (incipient impregnation or mechanical mixing). The differently prepared Mo/γ-AlO resulted in no obvious difference in activity of IcIM. It was further found that Co-Mo/γ-AlO activity initially increased appreciably with Mo content and leveled off at Mo contents above 9 wt.%. The catalyst exhibited a maximum activity at Co/Mo ratio 0.3. The order in which metal species were added had a great influence on the activity of the Co-Mo/γ-AlO catalyst. Higher activity was obtained when Co was added into Mo/γ-AlO as opposed to Mo added into Co/γ-AlO.
本研究的目的是研究制备条件对Co-Mo/γ-AlO催化剂催化性能的影响。该工作包括催化剂制备和反应。在制备过程中，发现钴浸渍的Mo/γ-AlO（称为IcIM）对噻吩的加氢脱硫（HDS）有促进作用。IcIM的活性和稳定性高于Mo/γ-AlO。相反，当通过机械混合法将钴添加到Mo/γ-AlO上时，未观察到促进作用。Mo/γ-AlO也使用两种不同方法（初湿浸渍或机械混合）制备。不同方法制备的Mo/γ-AlO对IcIM的活性没有明显差异。进一步发现，Co-Mo/γ-AlO活性最初随Mo含量显著增加，并在Mo含量高于9 wt.%时趋于平稳。该催化剂在Co/Mo比为0.3时表现出最大活性。添加金属物种的顺序对Co-Mo/γ-AlO催化剂的活性有很大影响。当将Co添加到Mo/γ-AlO中时，与将Mo添加到Co/γ-AlO中相比，可获得更高的活性。
