TY - JOUR
T1 - Hydro-treating of asphaltenes in supercritical toluene with mgo-supported Fe, Ni, NiMo, and CoMo catalysts
AU - Xu, Chunbao Charles
AU - Su, Huasu
AU - Ghosh, Mainak
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2009/7/16
Y1 - 2009/7/16
N2 - 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 CoMocatalysts 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 supercriticaltoluene. The activities of these catalysts for AS conversion showedthe order of sequence of Fe/MgO < Ni/MgO < CoMo/MgO < NiMo/MgO. Amongall 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. © 2009 American Chemical Society.
AB - 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 CoMocatalysts 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 supercriticaltoluene. The activities of these catalysts for AS conversion showedthe order of sequence of Fe/MgO < Ni/MgO < CoMo/MgO < NiMo/MgO. Amongall 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. © 2009 American Chemical Society.
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U2 - 10.1021/ef900126v
DO - 10.1021/ef900126v
M3 - RGC 21 - Publication in refereed journal
SN - 0887-0624
VL - 23
SP - 3645
EP - 3651
JO - Energy and Fuels
JF - Energy and Fuels
IS - 7
ER -