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Poster De Conférence Année : 2016

selective ring opening of decalin over bifunctional catalysts in the presence of sulfur

Résumé

Unconventional petroleum cuts are increasingly valued to compensate the decline of oil resources. It is the case of the light cycle oil (LCO) containing high concentrations of aromatics and naphthenic hydrocarbons which lower the cetane number of the feed. In order to improve the quality of the fuel into diesel, these molecules must be converted into linear alkanes (2ROP) and alkyl-cycloalkanes, or –benzenes (1ROP). This can be obtained by performing a selective ring opening (SRO) reaction. To focus our study on the SRO reactions, decalin - a saturated bicyclic molecule - can be used as model compound. Some supported metals like iridium or platinum [1] are known to be good candidates for SRO reactions, but activity decreases considerably in the presence of sulfur [2]. In this presentation, bifunctional catalysts containing both an acidic function (oxide support) and a metallic function (metal or metal sulfide nanoparticles) will be shown as thioresistant catalysts for SRO of decalin. The acidic function promotes cracking and isomerization reactions, while the latter favors hydrogenation, dehydrogenation and hydrogenolysis reactions. Both hydrogenolysis and (mild) cracking steps are suitable pathways for the ring opening. A major goal of our study was to investigate the synergy between the metallic and acidic functions in the presence of 1 % H2S. To this purpose, we have prepared and evaluated RuS2/HY catalysts for decalin SRO. The reaction products were identified by GCxGC. Figure 1 shows that the catalytic activity of the RuS2/HY supported catalyst is higher than that of the HY zeolite alone, and that hydrocracking and dehydrogenation routes are promoted by the metal sulfide phase addition. This work therefore suggests that sulfided metal catalysts supported on acidic zeolites are promising as catalysts for SRO reaction in the presence of H2S, provided that the hydrocracking function can be softened. 1. S. Rabl, D. Santi, A. Haas, M. Ferrari, V. Calemma, G. Bellussi, and J. Weitkamp, Microp. Mesop. Mater. 146 (2011) 190 2. S. Nassreddine, L. Massin, M. Aouine, C. Geantet, and L. Piccolo, J. Catal. 278 (2011) 253
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Dates et versions

hal-01320052 , version 1 (23-05-2016)

Identifiants

  • HAL Id : hal-01320052 , version 1

Citer

Nelly Catherin, Felice L. Di, L. Piccolo, D. Laurenti, C. Geantet, et al.. selective ring opening of decalin over bifunctional catalysts in the presence of sulfur. MACS-VII, May 2016, Doorn, Netherlands. ⟨hal-01320052⟩
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