CONICET | Buscador de Institutos y Recursos Humanos

Abstract The influence of Rh heteroatom on the molybdenum reducibility in the Anderson-type heteropolyoxomolybdate structure of formula (NH4)3[RhMo6O24H6]·7H2O was investigated by means of TPR technique. With comparative purposes, the thermal behavior in non-reducing conditions was also carried out by means of TGADTA studies. The study was performed by XRD, SEM, EDAX and FTIRRaman techniques. Results were related to those preliminary measurements over other XMo6 Anderson phases. Likewise, Rh(III)Al(III) formal replacement in the RhMo6 structural arrangement was proved. The formation of a solid solution in a limited range of composition (up to 0.25 Rh) was established in order to explore the catalytic performance of -Al2O3 supported planar heteropolyoxomolybdate, aiming at optimizing the noble metal content in the catalytic system. Preliminary measurements of RhMo6/-Al2O3 and (Rh, Al)Mo6/-Al2O3 activity for HDS and HYD processes were also performed. These results were compared to those obtained for CoMo6/-Al2O3 system in similar operating conditions and other conventional catalytic systems. The potentiality and scope of RhMo6 catalytic system for the HDS and HYD processes were analyzed. © 2006 Elsevier B.V. All rights reserved.4)3[RhMo6O24H6]·7H2O was investigated by means of TPR technique. With comparative purposes, the thermal behavior in non-reducing conditions was also carried out by means of TGADTA studies. The study was performed by XRD, SEM, EDAX and FTIRRaman techniques. Results were related to those preliminary measurements over other XMo6 Anderson phases. Likewise, Rh(III)Al(III) formal replacement in the RhMo6 structural arrangement was proved. The formation of a solid solution in a limited range of composition (up to 0.25 Rh) was established in order to explore the catalytic performance of -Al2O3 supported planar heteropolyoxomolybdate, aiming at optimizing the noble metal content in the catalytic system. Preliminary measurements of RhMo6/-Al2O3 and (Rh, Al)Mo6/-Al2O3 activity for HDS and HYD processes were also performed. These results were compared to those obtained for CoMo6/-Al2O3 system in similar operating conditions and other conventional catalytic systems. The potentiality and scope of RhMo6 catalytic system for the HDS and HYD processes were analyzed. © 2006 Elsevier B.V. All rights reserved.6 Anderson phases. Likewise, Rh(III)Al(III) formal replacement in the RhMo6 structural arrangement was proved. The formation of a solid solution in a limited range of composition (up to 0.25 Rh) was established in order to explore the catalytic performance of -Al2O3 supported planar heteropolyoxomolybdate, aiming at optimizing the noble metal content in the catalytic system. Preliminary measurements of RhMo6/-Al2O3 and (Rh, Al)Mo6/-Al2O3 activity for HDS and HYD processes were also performed. These results were compared to those obtained for CoMo6/-Al2O3 system in similar operating conditions and other conventional catalytic systems. The potentiality and scope of RhMo6 catalytic system for the HDS and HYD processes were analyzed. © 2006 Elsevier B.V. All rights reserved.6 structural arrangement was proved. The formation of a solid solution in a limited range of composition (up to 0.25 Rh) was established in order to explore the catalytic performance of -Al2O3 supported planar heteropolyoxomolybdate, aiming at optimizing the noble metal content in the catalytic system. Preliminary measurements of RhMo6/-Al2O3 and (Rh, Al)Mo6/-Al2O3 activity for HDS and HYD processes were also performed. These results were compared to those obtained for CoMo6/-Al2O3 system in similar operating conditions and other conventional catalytic systems. The potentiality and scope of RhMo6 catalytic system for the HDS and HYD processes were analyzed. © 2006 Elsevier B.V. All rights reserved.-Al2O3 supported planar heteropolyoxomolybdate, aiming at optimizing the noble metal content in the catalytic system. Preliminary measurements of RhMo6/-Al2O3 and (Rh, Al)Mo6/-Al2O3 activity for HDS and HYD processes were also performed. These results were compared to those obtained for CoMo6/-Al2O3 system in similar operating conditions and other conventional catalytic systems. The potentiality and scope of RhMo6 catalytic system for the HDS and HYD processes were analyzed. © 2006 Elsevier B.V. All rights reserved.6/-Al2O3 and (Rh, Al)Mo6/-Al2O3 activity for HDS and HYD processes were also performed. These results were compared to those obtained for CoMo6/-Al2O3 system in similar operating conditions and other conventional catalytic systems. The potentiality and scope of RhMo6 catalytic system for the HDS and HYD processes were analyzed. © 2006 Elsevier B.V. All rights reserved.6/-Al2O3 system in similar operating conditions and other conventional catalytic systems. The potentiality and scope of RhMo6 catalytic system for the HDS and HYD processes were analyzed. © 2006 Elsevier B.V. All rights reserved.6 catalytic system for the HDS and HYD processes were analyzed. © 2006 Elsevier B.V. All rights reserved. Keywords: Thermal behavior of heteropolyoxomolybdates; Rh and Al Anderson phases; RhMo/-Al2O3; Rh promoting effect; Hydrotreating catalystsThermal behavior of heteropolyoxomolybdates; Rh and Al Anderson phases; RhMo/-Al2O3; Rh promoting effect; Hydrotreating catalysts