Probing hydrodesulfurization over bimetallic phosphides using monodisperse Ni2-xMxP nanoparticles encapsulated in mesoporous silica

Danforth, Samuel J.; Liyanage, Dilhara; Hitihami‐Mudiyanselage, Asha; Ilic, Boris; Brock, Stephanie L.; Bussell, Mark E.

doi:10.1016/j.susc.2015.10.005

Cited by 20 publications

(24 citation statements)

References 43 publications

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“…Thus, the current research is focused on isotropic structures, such as metal phosphides, where the active metal is exposed in all crystallographic directions. 13 Transition metal phosphides (TMPs) are used as efficient hydrotreating catalysts for increasing the quality of oil through the HDS reaction. 14,15 TMPs show high thermal stability and high HDS conversion.…”

Section: Introductionmentioning

confidence: 99%

“…Dibenzothiophene (DBT) and thiophene, which are common organosulfur compounds found in crude oil, have been intensively studied experimentally in the literature. [13][14][15]17,[19][20][21][22] In contrast, SO 2 has not been given the required attention for HDS using TMPs, although it has an undeniable inuence on the environment. Specically, it was reported by Blair and coworkers 23 that the photo-oxidation of y-seven volatile organic compounds (VOCs) produces organosulfates (R-OS(O) 2 OH) when SO 2 molecules are present in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

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A DFT study of the adsorption energy and electronic interactions of the SO₂ molecule on a CoP hydrotreating catalyst

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A DFT study of the adsorption energy and electronic interactions of the SO₂ molecule on a CoP hydrotreating catalyst

et al. 2021

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“…[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). In addition, these catalysts series are easily prepared from the corresponding oxides and chlorides, and possessed dual properties of metals and ceramics with excellent thermal and chemical stability, as well as good conductors of heat.…”

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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“…Bimetallic catalysts impregnated SBA-15 (CoMo-SBA-15, NiMo-SBA-15) have shown better thiophene conversion compared to γ-Al 2 O 3 supported catalysts [ 52 , 53 ]. Some excellent reports and reviews are available on this topic and reveal that mesoporous silica frameworks, including SBA-15, MCM-41, MCM-48, and KIT-6, are promising HDS agents when they are incorporated with active species, such as WS 2 , NiW, Ni 2-x M x P (M = Co, Fe), MoS 2 , and NiMoO 4 , or with heteropolyacids, like H 3 PW 12 O 40 , H 3 PMo 12 O 40 , and (NH 4 ) 6 Mo 7 O 24 .4H 2 O [ 50 , 54 , 55 , 56 ]. Cost associated with HDS and stringent fuel specifications in recent times have motivated researchers to explore new innovative strategies.…”

Section: Strategies To Desulfurize Fuelmentioning

confidence: 99%

“…Different modes of deactivation may take place simultaneously, and adverse efforts are made for catalyst recovery by regeneration. The issue of sulfur poisoning is overcome by using phosphides of noble metals (Rh 2 P, Ru 2 P, Pd 5 P 2 ), by using transition metal phosphides (Co 2 P, CoP,Ni 2 P, MoP, WP), or by using acidic supports (Al-SBA-15) [49,50] [50,[54][55][56]. Cost associated with HDS and stringent fuel specifications in recent times have motivated researchers to explore new innovative strategies.…”

Section: Hydrodesulfurization (Hds)mentioning

confidence: 99%

Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

Mendiratta

Ali

2020

Nanomaterials

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Considerable health and climate benefits arising from the use of low-sulfur fuels has propelled the research on desulfurization of fossil fuels. Ideal fuels are urgently needed and are expected to be ultra-low in sulfur (10–15 ppm), with no greater than 50 ppm sulfur content. Although several sulfur removal techniques are available in refineries and petrochemical units, their high operational costs, complex operational needs, low efficiencies, and higher environmental risks render them unviable and challenging to implement. In recent years, mesoporous silica-based materials have emerged as promising desulfurizing agents, owing to their high porosity, high surface area, and easier functionalization compared to conventional materials. In this review, we report on recent progress in the synthesis and chemistry of new functionalized mesoporous silica materials aiming to lower the sulfur content of fuels. Additionally, we discuss the role of special active sites in these sorbent materials and investigate the formulations capable of encapsulating and trapping the sulfur-based molecules, which are challenging to remove due to their complexity, for example the species present in JP-8 jet fuels.

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Probing hydrodesulfurization over bimetallic phosphides using monodisperse Ni2-xMxP nanoparticles encapsulated in mesoporous silica

Cited by 20 publications

References 43 publications

A DFT study of the adsorption energy and electronic interactions of the SO₂ molecule on a CoP hydrotreating catalyst

A DFT study of the adsorption energy and electronic interactions of the SO₂ molecule on a CoP hydrotreating catalyst

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

Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

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Probing hydrodesulfurization over bimetallic phosphides using monodisperse Ni2-xMxP nanoparticles encapsulated in mesoporous silica

Cited by 20 publications

References 43 publications

A DFT study of the adsorption energy and electronic interactions of the SO2 molecule on a CoP hydrotreating catalyst

A DFT study of the adsorption energy and electronic interactions of the SO2 molecule on a CoP hydrotreating catalyst

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

Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

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A DFT study of the adsorption energy and electronic interactions of the SO₂ molecule on a CoP hydrotreating catalyst

A DFT study of the adsorption energy and electronic interactions of the SO₂ molecule on a CoP hydrotreating catalyst