Novel mesoporous aluminosilicate supported palladium-rhodium catalysts for diesel upgrading ☆: II. Catalytic activity and improvement of industrial diesel feedstocks
Bimetallic PdRh catalysts (molar ratio Pd/Rh = 1 and 2) were prepared by impregnation of a mesoporous aluminosilicate (molar ratio Si/Al = 10 and 20). These materials are destined to be used in industrial processes aiming to improve diesel quality by hydrogenation and ring-opening of aromatic components. The four catalysts were examined for their activity in hydrogenation of naphthalene and tetralin model feedstocks, at 6 MPa, including in the presence of sulfur containing compounds. The capacity of one of these catalysts to improve the quality of hydrogenated industrial light cycle oil containing ≤50 wt ppm of sulfur was evaluated in a pilot plant. In these industrial conditions, the catalyst has a higher catalytic activity at lower temperature than a reference state of-the-art catalyst, giving a seven-point improvement of the cetane number at 280–300 °C and with formation of less than 10% of non-selective cracking products.
Graphical abstractNovel PdRh bimetallic catalysts supported on mesoporous aluminosilicates and having a range of Pd/Rh and Si/Al molar ratios are screened for their activity in hydrogenation of naphthalene and tetralin model feedstocks, at 6 MPa. The most active catalyst is used for the upgrading of light cycle oil in an industrial pilot plant, when diesel of cetane index 46 is obtained. Figure optionsDownload full-size imageDownload as PowerPoint slide
Journal: Applied Catalysis A: General - Volume 340, Issue 2, 1 June 2008, Pages 257–264