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

• Published in: Microporous and mesoporous materials 2001-06, Vol.44-45, p.547-556
• Main Authors: Chiranjeevi, T, Kumar, P, Maity, S.K, Rana, M.S, Murali Dhar, G, Prasada Rao, T.S.R
• Format: Article
• Language: English
• Subjects: Al–HMS, HMS; Catalysis; Catalysts: preparations and properties; Chemistry; CoMo catalysts; Exact sciences and technology; General and physical chemistry; Hydrotreating catalysts; Oxygen chemisorption; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/S1387-1811(01)00233-5

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 first 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 WS2 derived from it indicated that WS2 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 WS2 catalysts showed outstanding activities in comparison with WS2 supported on γ-Al2O3.