Catalyst and process technologies for ultra low sulfur diesel

Knudsen, Kim; Cooper, Barry H.; Topsøe, Henrik

doi:10.1016/s0926-860x(99)00277-x

Cited by 383 publications

(223 citation statements)

References 13 publications

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“…Though traditional HDS catalysts are highly efficient in removing thiols, sulfides, and disulfides, they are inefficient in ultra-deep desulfurization of refractory sulfur-containing compounds, such as 4,6-dimethydibenzothiophene (4,6-DMDBT). Therefore, development of novel HDS catalysts with super high activity is needed [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Hydrodesulfurization of 4,6-DMDBT on a multi-metallic sulfide catalyst with layered structure

Wang

Zhang

et al. 2011

Applied Catalysis A: General

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Section: Introductionmentioning

confidence: 99%

Hydrodesulfurization of 4,6-DMDBT on a multi-metallic sulfide catalyst with layered structure

Wang

Zhang

et al. 2011

Applied Catalysis A: General

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“…The CoMoS structure is characterized by a doublet peak with specific Mössbauer parameters (isomer shift and quadrupole splitting) completely different from those for Co 9 S 8 or CoAl 2 O 4 -like species. 17,18 Furthermore, the FTIR study of NO adsorption on CoMo/Al 2 O 3 suggested the location of Co forming the CoMoS structure.…”

Section: Dds Pathway Hyd Pathway Isomerization Pathwaymentioning

confidence: 94%

“…Taking into consideration the coordination numbers of MoMo (0.8), MoS (4.4), CoCo (0.7), and CoS (3.4) atomic pairs, it is proposed that the structure of Co 2 Mo 2 S 6 clusters is of a thiocubane type, as illustrated in Figure 16. 109 8 ] in n-hexane was admitted to MoS 2 /NaY, followed by evacuation to remove the solvent. 111 The difference in the local structure may reflect the effects of ligands attached to Co 2 Mo 2 thiocubane cores.…”

Section: 70mentioning

confidence: 99%

Novel Molecular Approaches to the Structure–Activity Relationships and Unique Characterizations of Co–Mo Sulfide Hydrodesulfurization Catalysts for the Production of Ultraclean Fuels

Okamoto¹

2013

Bulletin of the Chemical Society of Japan

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Hydrodesulfurization (HDS) catalysts have been extensively used worldwide in refineries to protect the environment. The present Account reviews our recent studies to establish the structureactivity relationships of HDS catalysts on a molecular level. We have developed two molecular approaches to this issue; a molecular cluster approach using intrazeolite Mo sulfide and CoMo binary sulfide clusters possessing well-defined structures and a CVD-CoMo sulfide designed catalyst approach in which Co is exclusively accommodated in the CoMoS structure, the active sites of HDS catalysts. It is revealed that the Co sites of intrazeolite thiocubane-type [Co 2 Mo 2 S 6 ] clusters play a pivotal role in HDS reaction and that the MoMo atomic distance of Mo 2 S 4 dinuclear clusters determines the HDS activity. Designed CVDCoMo catalysts supported on refractory oxides have been successfully prepared by CVD using [Co(CO) 3 NO] as a precursor of Co. Combined with magnetic properties and XAFS, it is concluded that the CoMoS structure is dinuclear Co sulfide clusters located on the edge of MoS 2 nanoparticles. It is shown that the intrinsic activity of the CoMoS structure substantially depends on the MoS 2 -edge where it is located. The effects of support and additives are discussed on the basis of the intrinsic activity. Both MoS 2 support interactions and reaction or sulfidation conditions elucidate the local structure and intrinsic activity of the CoMoS structure. It is demonstrated that the CVD technique using [Co(CO) 3 NO] provides unique characterization methods of HDS catalysts.

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“…In 1993, the Clean Air Act (CAA) proscribed the sales and supply of diesel oil with sulfur concentration higher than 0.5 g kg -1 . In 1998, the EU set the target for sulfur content in diesel fuel at the levels of 0.35 and 0.05 g kg -1 for the years 2000 and 2005, respectively (Knudsen et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Removal of refractory organic sulfur compounds in fossil fuels using MOF sorbents

2013

Global NEST Journal

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The stringent new regulations to lower sulfur content in fossil fuels require new economic and efficient methods for desulfurization of recalcitrant organic sulfur. Hydrodesulfurization of such compounds is very costly and requires high operating temperature and pressure. Adsorption is a non-invasive approach that can specifically remove sulfur from refractory hydrocarbons under mild conditions and it can be potentially used in industrial desulfurization. Intensive research has been conducted in materials development to increase their desulfurization activity; however, even the highest activity obtained is still insufficient to fulfil the industrial requirements. To improve the adsorption capacity and sorbent regeneration, more work is needed in areas such as increasing specific desulfurization activity, hydrocarbon phase tolerance, sulfur removal at higher temperature, and development of new porous substrates for desulfurization of a broader range of sulfur compounds. This work comprehensively describes the adsorption of organo-sulfur compounds present in liquid fuels on metal-organic framework (MOF) compounds. It has been demonstrated that the extent of dibenzothiophene (DBT) adsorption at temperatures close to ambient (304 K) is much higher on MOF systems than on the benchmarked Y-type zeolite and activated carbons. In addition, the DBT adsorption capacity depends strongly on the MOF type as illustrated by the much higher extent of adsorption observed on the Cu-(C300) and Al-containing (A100) MOF systems than on the Fe-containing (F300) MOF counterpart.

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Catalyst and process technologies for ultra low sulfur diesel

Cited by 383 publications

References 13 publications

Hydrodesulfurization of 4,6-DMDBT on a multi-metallic sulfide catalyst with layered structure

Hydrodesulfurization of 4,6-DMDBT on a multi-metallic sulfide catalyst with layered structure

Novel Molecular Approaches to the Structure–Activity Relationships and Unique Characterizations of Co–Mo Sulfide Hydrodesulfurization Catalysts for the Production of Ultraclean Fuels

Removal of refractory organic sulfur compounds in fossil fuels using MOF sorbents

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