02118nab a2200205 4500 20260520000843.0 260224s2009 xxu Hydro-treating of asphaltenes in supercritical toluene with MgO-supported Fe, Ni, NiMo, and CoMo catalysts jul./ago. 2009 15/06/2010 ; 15/06/2010 7 p. ; 3645-3651 Transcripción del resumen del autor. For the first time, the AVTB-derived asphaltenes (containing very high concentrations of sulfur (7.70 wt % S) and nitrogen (1.08 wt % N)) were hydrotreated over novel MgO-supported Fe, Ni, NiMo, and CoMo catalysts in supercritical toluene at 380 °C under hydrogen of 5 MPa (cold pressure) in a batch reactor. The supercritical toluene alone without any catalyst was found to be effective for conversion of the highly aromatic asphaltenes (AS) to less aromatic maltenes (MA) through a thermal cracking mechanism. All the MgO-supported catalysts proved to be effective for hydro-conversion of AS to MA in supercritical toluene. The activities of these catalysts for AS conversion showed the order of sequence of Fe/MgO < Ni/MgO < CoMo/MgO < NiMo/MgO. Among all the MgO-supported catalysts tested, NiMo/MgO was found to be the most active one for promoting the removal of sulfur and AS. The sulfur/nitrogen/AS removal efficiencies for the NiMo/MgO catalyst increased with the treatment time, and the efficiencies at 120 min of treatment attained as high as 43%, 30%, and 70%, respectively. The MgO-supported catalysts showed excellent performance for preventing and retarding the formation of highly condensed aromatics or coke in the hydro-treatment of AS in supercritical toluene. With the presence of NiMo/MgO catalyst, hydro-treating AS in the supercritical toluene for a reaction time up to 120 min produced a strikingly low yield (<0.7%) of toluene-insoluble product. 4 Energy & fuels 23 ARTICULO Xu, Chumbao (Charles) 42667 Su, Huasu 42668 Ghosh, Mainak 42669 171028 171028 0 0 0 0 238847 BAAB BAAB 2026-03-05 200045886 0 200045886 2026-03-05 15:13:24 2026-03-05 ARTICULO