Characterization and hydrodesulfurization catalysis on WS2 supported on mesoporous Al–HMS material

✍ Scribed by T Chiranjeevi; P Kumar; S.K Maity; M.S Rana; G Murali Dhar; T.S.R Prasada Rao

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 193 KB
• Volume: 44-45
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(01)00233-5

✦ Synopsis

Hexagonal mesoporous silica (HMS) and Al±HMS materials with high surface area and mesoporous structure were synthesized following the neutral templating path way. These materials were used as a support for the ®rst time in preparing W/HMS, and W/Al±HMS catalysts and their Co, and Ni promoted analogues. On Al±HMS support (Si/ Al 35) the tungsten loading was varied from 10 to 25 wt.%. On a catalyst containing 21 wt.% W the promoter concentration was varied from 1 to 5 wt.%. Oxygen uptakes and crystallite sizes of WS 2 derived from it indicated that WS 2 is well dispersed at all the loadings studied. The hydrodesulfurization and hydrogenation activities varied in a similar manner to that of oxygen uptakes as a function of W loading indicating that there exists a correlation between oxygen chemisorption and catalytic sites. The HMS and Al±HMS mesoporous material supported WS 2 catalysts showed outstanding activities in comparison with WS 2 supported on c-Al 2 O 3 .