Effect of Zr-SBA-15 support on catalytic functionalities of Mo, CoMo, NiMo hydrotreating catalysts

✍ Scribed by Shelu Garg; Kapil Soni; G. Muthu Kumaran; Manoj Kumar; J.K. Gupta; L.D. Sharma; G. Murali Dhar

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 769 KB
• Volume: 130
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/j.cattod.2007.10.082

✦ Synopsis

SBA-15 and ZrO 2 (10-50 wt.%) containing SBA-15 mesoporous materials were prepared by direct and post-synthesis methods. Characterization using low angle XRD, pore size distribution, CO 2 chemisorption indicate that hexagonal mesoporous structure is retained even after ZrO 2 addition (25 wt.%). Mo, CoMo and NiMo catalysts prepared using these supports were examined by XRD, oxygen chemisorption, temperature programmed reduction (TPR). The catalysts were tested for hydrodesulfurization (HDS) of thiophene and hydrogenation (HYD) of cyclohexene. HDS of thiophene for 8%Mo, 3%Co8%Mo, and 3%Ni8%Mo increases with increasing ZrO 2 loading in SBA-15 up to 25 wt.%. Oxygen chemisorption and TPR hydrogen consumption indicated that the molybdenum dispersion and anion vacancies, and catalytic activities are significantly influenced by ZrO 2 content in Zr-SBA-15. A comparison indicated that TiO 2 -SBA-15, ZrO 2 -SBA-15 supported CoMo catalysts show higher activities for hydrodesulfurization.