Hydrotreating catalysts containing zeolites and related materials—mechanistic aspects related to deep desulfurization
Catalysis Today(2003)
摘要
The deep hydrodesulfurization (HDS) of diesel fuels requires the decomposition of refractory compounds such as 4,6-dimethyldibenzothiophene (46DMDBT). There is a general agreement on the fact that the low reactivity of these compounds is due to steric hindrance of the transition state leading to C–S bond cleavage, which annihilates the effect of the promoter to a large extent. The consequence is that their so-called “direct desulfurization pathway” is particularly inhibited.
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关键词
Hydrodesulfurization,Dibenzothiophene,4,6-Dimethyldibenzothiophene,Bifunctional catalysts,Molybdenum sulfide,Cobalt–molybdenum sulfides,Nickel–molybdenum sulfides,Zeolites,Mesoporous materials
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