Science and technology of novel processes for deep desulfurization of oil refinery streams: a review☆ ☆

Recent advances in the science and technology of ultra low sulfur diesel (ULSD) production

Transition metal phosphide hydroprocessing catalysts: A review

The possible origins of sulfur impurities in FCC gasoline are reviewed and discussed. Their mechanism of formation during the FCC process as well as their mechanism of transformation on hydrotreating catalysts are also examined. The article focuses on the desulfurization of FCC gasoline by means of catalytic processes considering the fact that deep desulfurization must be achieved (in accordance with new regulations) while preserving octane rating of the fraction. The various parameters (presence of a promoter, nature and modification of the support, additives and poisons) which may influence the selectivity in hydrodesulfurization (HDS) versus olefin hydrogenation are also discussed. Existing and potential processes for the HDS of FCC gasoline with octane preservation are described.

On the hydrodesulfurization of FCC gasoline: a review

Bio-oils coming from ligno-cellulosic biomass are suitable material for the production of second generation biofuels. The oxygenated compounds have to be eliminated to confer good properties to these bio-oils and to permit their addition to traditional fuels. Hydrodeoxygenation (HDO) process which allows O-elimination by C–O bond cleavage under H2 can be realized with the same type of catalysts as those used in HDS, supported CoMoS or NiMoS phases. In this work, the support effect associated with CoMoS catalysts has been investigated in guaiacol HDO reaction. Zirconia and titania supports have been compared with the traditional industrially used γ-alumina and it appeared that zirconia as support gave very efficient conversion of guaiacol into deoxygenated hydrocarbons with a totally different selectivity. The difference in selectivity allowed us to propose a different reaction scheme compared to γ-alumina and titania supported CoMoS.

Frédéric Bataille

Papers

Alkyldibenzothiophenes Hydrodesulfurization-Promoter Effect, Reactivity, and Reaction Mechanism