Hydrodeoxygenation of furan: characterization of promoted and unpromoted tungsten sulphide catalysts by low temperature oxygen chemisorption and its correlation with hydrodeoxygenation

Rao, K. Sai Prasad; Khajamasthan, Shaik; Muralidhar, G.; Chary, Komandur V. R.; Subrahmanyam, Varanasi Surya

doi:10.1039/c39880000375

Cited by 5 publications

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“…The reactant has a six-member ether ring with a methyl group attached to one alpha-carbon. Analogous compounds with five-member ether rings such as furan and furan derivatives were investigated on various catalysts including conventional hydrotreating catalysts, − noble metals, − metals, − and metal phosphides. − …”

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confidence: 99%

Reactions of 2-Methyltetrahydropyran on Silica-Supported Nickel Phosphide in Comparison with 2-Methyltetrahydrofuran

et al. 2016

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The reactions of 2-methyltetrahydropyran (2-MTHP, C6H12O) on Ni2P/SiO2 provide insights on the interactions between a cyclic ether, an abundant component of biomass feedstock, with a transition-metal phosphide, an effective hydrotreating catalyst. At atmospheric pressure and a low contact time, conditions similar to those of a fast pyrolysis process, 70% of products formed from the reaction of 2-MTHP on Ni2P/SiO2 were deoxygenated products, 2-hexene and 2-pentenes, indicating a good oxygen removal capacity. Deprotonation, hydrogenolysis, dehydration, and decarbonylation were the main reaction routes. The reaction sequence started with the adsorption of 2-MTHP, followed by ring-opening steps on either the methyl substituted side (Path I) or the unsubstituted side (Path II) to produce adsorbed alkoxide species. In Path I, a primary alkoxide was oxidized at the α-carbon to produce an aldehyde, which subsequently underwent decarbonylation to 2-pentenes. The primary alkoxide could also be protonated to give a primary alcohol which could desorb or form the final product 2-hexene. In Path II, a secondary alkoxide was oxidized to produce a ketone or was protonated to a secondary alcohol that was dehydrated to give 2-hexene. The active sites for the adsorption of 2-MTHP and O-intermediates were likely to be Ni sites.

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Section: Introductionmentioning

confidence: 99%

Reactions of 2-Methyltetrahydropyran on Silica-Supported Nickel Phosphide in Comparison with 2-Methyltetrahydrofuran

et al. 2016

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Rare‐Earth Metal Allyl and Hydrido Complexes Supported by an (NNNN)‐Type Macrocyclic Ligand: Synthesis, Structure, and Reactivity toward Biomass‐Derived Furanics

Abinet

Martin

Standfuss

et al. 2011

Chemistry A European J

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The preparation and characterization of a series of neutral rare-earth metal complexes [Ln(Me(3)TACD)(η(3)-C(3)H(5))(2)] (Ln=Y, La, Ce, Pr, Nd, Sm) supported by the 1,4,7-trimethyl-1,4,7,10-tetraazacyclododecane anion (Me(3)TACD(-)) are reported. Upon treatment of the neutral allyl complexes [Ln(Me(3)TACD)(η(3)-C(3)H(5))(2)] with Brønsted acids, monocationic allyl complexes [Ln(Me(3)TACD)(η(3)-C(3)H(5))(thf)(2)][B(C(6)X(5))(4)] (Ln=La, Ce, Nd, X=H, F) were isolated and characterized. Hydrogenolysis gave the hydride complexes [Ln(Me(3)TACD)H(2)](n) (Ln=Y, n=3; La, n=4; Sm). X-ray crystallography showed the lanthanum hydride to be tetranuclear. Reactivity studies of [Ln(Me(3)TACD)R(2)](n) (R=η(3)-C(3)H(5), n=0; R=H, n=3,4) towards furan derivatives includes hydrosilylation and deoxygenation under ring-opening conditions.

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Characterization of supported vanadium oxide catalysts by a low-temperature oxygen chemisorption technique

1991

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Hydrodeoxygenation of furan: characterization of promoted and unpromoted tungsten sulphide catalysts by low temperature oxygen chemisorption and its correlation with hydrodeoxygenation

Abstract: The amount of oxygen chemisorbed at -78°C has been measured on the sulphided surface of tungsten catalysts supported on Al2O3 and SiO,; it is shown for the first time that there is a correlation with the activity of the catalyst for hydrodeoxygenation of furan.

Cited by 5 publications

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Reactions of 2-Methyltetrahydropyran on Silica-Supported Nickel Phosphide in Comparison with 2-Methyltetrahydrofuran

Reactions of 2-Methyltetrahydropyran on Silica-Supported Nickel Phosphide in Comparison with 2-Methyltetrahydrofuran

Rare‐Earth Metal Allyl and Hydrido Complexes Supported by an (NNNN)‐Type Macrocyclic Ligand: Synthesis, Structure, and Reactivity toward Biomass‐Derived Furanics

Characterization of supported vanadium oxide catalysts by a low-temperature oxygen chemisorption technique

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