Hidrogenación selectiva de metil ésteres de ácidos grasos para obtención de alcoholes grasos. I. Perspectivas actuales, catalizadores y mecanismos de reacción.

A review is presented about the production of fatty alcohols by selective hydrogenation of the corresponding fatty acid methyl esters. The process technology status is also presented with references tochemical process types and catalysts, and the current trends in the research field on this area are discussed. Recent advances in the elucidation of catalytic reaction mechanisms according to the new structural and functional characteristics of prototype catalysts developed to improve this process are commented in brief. Some simplified kinetics models potentially useful for the catalytic reaction modeling are proposed

Influence of iridium content on the behavior of Pt-Ir/Al2O3 and Pt-Ir/TiO2 catalysts for selective ring opening of naphthenes

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Influence of the Brønsted acidity, SiO2/Al2O3 ratio and Rh-Pd content on the ring opening: Part I. Selective ring opening of decalin

International audienceThe influence of the Bronsted acidity, SiO2/Al2O3 ratio and Rh-Pd content on the ring opening of decalin was studied. Rh- and Pd-based monometallic and bimetallic catalysts were prepared by impregnation on three commercial SiO2/Al2O3 supports (SIRAL 5, 20 and 40). The catalysts were characterized by TPD of pyridine, X-ray diffraction, H-2 chemisorption, isomerization of 3,3-dimethyl-1-butene (33DM1B) and selective ring opening (SRO) of decalin. It was found that the support acidity is strongly influenced by the SiO2/Al2O3 ratio, the SIRAL 40 being more acid. The metal accessibility has the following order: supported catalysts on SIRAL 40 > SIRAL 20 > SIRAL 5. The incorporation of Rh and/or Pd modifies the conversion and the product distribution on decalin reaction. The support acidity has a strong influence on the conversion and product distribution on the decalin reaction at 350 degrees C, SIRAL 5 series have low selectivity to RO and high selectivity to dehydrogenated compounds. On the other hand, SIRAL 40 series lead to the highest yield to cracking products of the three studied series. Catalysts with Rh/Pd atomic ratios equal to 2 and monometallic Rh1 supported on SIRAL 40 are the most active and selective catalysts to ring opening product