Behavior of catalysts with rhodium in simultaneous hydrodesulfurization and hydrogenation reactions

Giraldo, Sonia A.; Pinzón, M.H.; Centeno, Aristóbulo

doi:10.1016/j.cattod.2007.12.021

Cited by 11 publications

(14 citation statements)

References 18 publications

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“…Noble metal (Pt,Ru,Pd)-Mo/alumina samples prepared by Meriño et al (2000) showed a decrease in the activity for the hydrodesulfurization reaction of dibenzothiophene when one monolayer of the MoO -like phase was 3 developed on the alumina substrate and, subsequently, Pt(IV) ions were adsorbed on the MoO /Al O system. However, a better activity of 3 2 3 the catalysts can be obtained by keeping the Moloading below the monolayer capacity of the Al O 2 3 surface, Pinzon et al (2006), Giraldo et al (2008), these results confirm that both the monolayer of Mo species on the surface and the ion coimpregnation influence the adsorption process during the impregnation steps of noble metal-Mo/alumina samples.…”

Section: 3supporting

confidence: 61%

Descripción teórica y experimental del equilibrio de adsorción de soluciones iónicas en la superficie de los sistemas γ-Al2O3 y MoO3/γ-Al2O3

Martínez¹,

Fierro²

2011

inycomp

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Se estudiaron las isotermas de adsorción en equilibrio de iones Mo, Co y Pt sobre γ-Al2O3 y iones Co y Pt sobre MoO3/γ-Al2O3. Los catalizadores molibdeno alúmina para los ensayos de adsorción fueron preparados por impregnación de los soportes de alúmina con heptamolibdato de amonio. Los datos de equilibrio de adsorción fueron obtenidos a partir del proceso de adsorción liquido-sólido. Las curvas de adsorción fueron tipo L para los sistemas Mo y Co sobre γ-Al2O3 y Co(Pt) sobre MoO3/γ-Al2O3, mientras para el sistema Pt(Co) sobre MoO3/-Al2O3 fueron tipo S. Para el caso del molibdeno, se encontró que las especies en solución (tetraédricas y octaédricas) afectan la adsorción del molibdeno. La adsorción de iones Co(II) sobre alúmina o alúmina modificada no depende de la alúmina utilizada. La forma de las isotermas de adsorción de iones Co sobre MoO3/γ-Al2O3 parece ser modificada cuando los iones Pt(IV) están presentes simultáneamente. Los procesos de adsorción de especies de Pt dependen de la presencia de Mo(VI) y Co(II) en la superficie de los soportes. Se observó que la cantidad de Pt adsorbido sobre MoO3/γ-Al2O3 disminuye en presencia de iones Co(II) en solución. Finalmente, se calcularon los parámetros de adsorción en equilibrio de los sistemas Mo(VI) and Co(II) sobre γ-Al2O3 and Co(II) y/o Pt(IV) sobre MoO3/γ-Al2O3.

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Section: 3supporting

confidence: 61%

Descripción teórica y experimental del equilibrio de adsorción de soluciones iónicas en la superficie de los sistemas γ-Al2O3 y MoO3/γ-Al2O3

Martínez¹,

Fierro²

2011

inycomp

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“…[119][120][121][122][123][124] Additionally, Ru, Rh and Re were explore to advance the HDS activity of different crude oils, but the advances were shortfall of the performances obtained for conventional catalysts and could not be advanced for industrial feasibility. [102,123,[125][126][127][128][129][130] Another important class of HDS catalysts, gaining fast research interests and touted to be a serious alternative to the transition metal sulfides is transition metal phosphides (MP or M 2 P). [131][132][133][134][135][136][137][138][139][140][141][142][143][144] This popularity and research acceptability is due to their intrinsic catalytic performance during HDS reaction that is well compared to the conventional sulfided Ni(Co)Mo(W).…”

Section: Active Phasementioning

confidence: 99%

“…in supported HDS catalysts [119–124] . Additionally, Ru, Rh and Re were explore to advance the HDS activity of different crude oils, but the advances were shortfall of the performances obtained for conventional catalysts and could not be advanced for industrial feasibility [102,123,125–130] …”

Section: Active Phasementioning

confidence: 99%

Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

Ganiyu

2021

Chemistry An Asian Journal

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It is undisputed that there is a paradigm shift in the global trend of crude oil towards being more sour and heavier than usual light sources. Consequently, the hydrotreating activity becomes a bottleneck with high content of S, N, metals and other impurities than expected. On the other hand, the price of petroleum products lately witnessed instability and fell to the lowest average price (<USD 20) in recent times. In the same vein, the regulation to control the emission of toxic compounds in the atmosphere become stricter as promulgated by various policymakers. In this sense, robust hydrotreating catalysts with characteristics efficient catalytic activity, selectivity and stability are highly desirable. Recently, different approaches have been used to improve and cushion the unprecedented effect emanated from economic, social and environmental challenges posed by heavy and sour crude sources, price instability of the refined products and regulation to lower the sulfur to minimum level or zero parts per millions (ppm). Importantly, the role of support in catalysis cannot be over emphasized, whilst the surface area and porosity, mechanical and thermal stability, dispersion of active metals, acidity/basicity have been greatly improved, the increased activity, stability and selectivity has been observed significantly. In this review, hybrid supports based on aluminosilicates (zeolitic types) and other notable supports from recent literatures were explored and discussed for Ni(Co)Mo(W) supported catalysts for hydrodesulfurization (HDS) activity of heavy organosulfur molecules. The emphasis on the hybrid supports’ varied characteristics for HDS of organosulfur molecules, where there are necessities for fast diffusion of reactants and products, better dispersion of MoS2 crystallites, high surface area and pore volume, and increased acidity of the catalysts are greatly emphasized. Furthermore, the progress made so far on different HDS active phases viz. noble metals, metal phosphides, intermetallic silicides, carbides and iron‐zinc are highlighted in this write‐up, irrespective of the support composition in the supported catalysts formulations. The need for application of predictive tools, like machine learning (ML) in the design and development of HDS catalysts, and performance evaluation of HDS activity towards achieving better catalytic operation was briefly highlighted. Finally, the review will serve as a summary of scientific efforts in this regards and bridge a gap for the newcomers to investigate the topic in a better way through proper selection and efficient catalysts design.

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“…The HDS of light gas oil and of dibenzothiophene over alumina supported noble metals was studied by Ishihara et al [4] and Lee et al [5] and a high activity of the Rh catalyst was observed. The behavior of Rh/c-Al 2 O 3 in simultaneous HDS and hydrogenation was described by Giraldo et al [6]. Rh/calumina catalyst obtained by laser vaporization of Rh clusters was more active than commercial CoMo/c-Al 2 O 3 catalyst [7].…”

Section: Introductionmentioning

confidence: 95%

Support effect in the hydrodesulfurization of thiophene over rhodium sulfide

Kaluža

Vı́t

Zdražil

2010

Reac Kinet Mech Cat

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The effect of support on thiophene hydrodesulfurization activity over rhodium sulfide was studied. The loading was 5 wt% and the supports were (surface areas S BET in m 2 g -1 in parenthesis): C (1100), Nb 2 O 5 (99), ZrO 2 (108), TiO 2 (140), SiO 2 (289), MgO (300) and 11 Al 2 O 3 (77-279). The activity at 400°C decreased in the order (relative activity in parenthesis): C (4.44), Al 2 O 3 (0.98-0.32), Nb 2 O 5 (0.54), ZrO 2 (0.50), TiO 2 (0.48), SiO 2 (0.26), MgO (0.19), commercial CoMo/Al 2 O 3 (1.00). The activity did not correlate with S BET , point of zero charge PZC of the support and the ratio S/Rh in the presulfided catalysts. The broad range of activities of Rh/Al 2 O 3 illustrate that secondary factors such as S BET , texture, PZC, impurities and additives might be as important as the principal type of the support.

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Behavior of catalysts with rhodium in simultaneous hydrodesulfurization and hydrogenation reactions

Cited by 11 publications

References 18 publications

Descripción teórica y experimental del equilibrio de adsorción de soluciones iónicas en la superficie de los sistemas γ-Al2O3 y MoO3/γ-Al2O3

Descripción teórica y experimental del equilibrio de adsorción de soluciones iónicas en la superficie de los sistemas γ-Al2O3 y MoO3/γ-Al2O3

Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

Support effect in the hydrodesulfurization of thiophene over rhodium sulfide

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