Catalytic transfer hydrogenolysis of lignin α-O-4 model compound 4-(benzyloxy)phenol and lignin over Pt/HNbWO6/CNTs catalyst

Guan, Weixiang; Chen, Xiao; Zhang, Jie; Hu, Haoquan; Liang, Changhai

doi:10.1016/j.renene.2020.04.078

Cited by 38 publications

(23 citation statements)

References 45 publications

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“…For example, Guan et al. reported the CTH of an α‐O‐4 model compound 4‐(benzyloxy)phenol and lignin extracted from bioconverted rice straw over Pt/HNbWO 6 /CNTs catalyst using isopropanol as the solvent and in‐situ hydrogen donor [8] . Light alcohols (methanol, ethanol, and isopropanol) are the most common solvents for CTH due to their ability to solvate/disperse lignin degradation products and donate hydrogen atoms, [8,9] thereby conferring excellent CTH performance.…”

Section: Introductionmentioning

confidence: 99%

“…reported the CTH of an α‐O‐4 model compound 4‐(benzyloxy)phenol and lignin extracted from bioconverted rice straw over Pt/HNbWO 6 /CNTs catalyst using isopropanol as the solvent and in‐situ hydrogen donor [8] . Light alcohols (methanol, ethanol, and isopropanol) are the most common solvents for CTH due to their ability to solvate/disperse lignin degradation products and donate hydrogen atoms, [8,9] thereby conferring excellent CTH performance. Formic acid is also employed as an effective hydrogen donor, which can undergo in‐situ thermal/catalytic decomposition to liberate molecular hydrogen [10,11] under acidic conditions and thereby promote hydrogenolysis/HDO reactions in lignin depolymerization; [12,13] it can also direct the non‐catalytic formylation of lignin and subsequent cleavage of β‐O‐4 structural units [14] .…”

Section: Introductionmentioning

confidence: 99%

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Selective Catalytic Transfer Hydrogenation of Lignin to Alkyl Guaiacols Over NiMo/Al‐MCM‐41

Guo

Chen

et al. 2022

ChemSusChem

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Efficient deoxygenation of lignin-derived bio-oils is central to their adoption as precursors to sustainable liquid fuels in place of current fossil resources. In-situ catalytic transfer hydrogenation (CTH), using isopropanol and formic acid as solvent and in-situ hydrogen sources, was demonstrated over metaldoped and promoted MCM-41 for the depolymerization of oxygen-rich (35.85 wt%) lignin from Chinese fir sawdust (termed O-lignin). A NiMo/Al-MCM-41 catalyst conferred an optimal lignin-derived oil yield of 61.6 wt% with a comparatively low molecular weight (M w = 542 g mol À 1 , M n = 290 g mol À 1 ) and H/C ratio of 1.39. High selectivity to alkyl guaiacols was attributed to efficient in-situ hydrogen transfer from isopropanol/formic acid donors, and a synergy between surface acid sites in the Aldoped MCM-41 support and reducible Ni/Mo species, which improved the chemical stability and quality of the resulting lignin-derived bio-oils.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective Catalytic Transfer Hydrogenation of Lignin to Alkyl Guaiacols Over NiMo/Al‐MCM‐41

Guo

Chen

et al. 2022

ChemSusChem

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“…From the perspective of selectivity and green chemistry, hydrogenolysis is one of the most efficient approaches 8 . Various metal catalysts based on Pd [9][10][11] , Ru 4,12,13 , Pt [14][15][16] , Ni 17,18 and Re [19][20][21] , etc., have been reported for the hydrogenolysis of lignin, among which noble metal catalysts have shown good hydrogenation performance. However, undesirable over-hydrogenation is hard to avoid in noble metal-catalyzed transformation.…”

Section: Introductionmentioning

confidence: 99%

Constructing Single-atom Ni on N-doped Carbon Via Chelation-anchored Strategy for the Hydrogenolysis of Lignin

Tianjin¹,

Chen²,

Meifang³

et al. 2022

Preprint

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The utilization of lignin remains a great challenge due to its complex non-repetitive structure and the lack of efficient catalyst. Herein, a single-atom catalyst Ni@N-C was designed via a facile chelation-anchored strategy. Ni atoms were immobilized on the N-doped carbon carrier by a two-stage pyrolysis of a mixture of D-glucosamine hydrochloride, nickel acetate and melamine. D-glucosamine hydrochloride as a chelating agent prevented the aggregation of Ni2+, and melamine provided enough N to anchor Ni by forming Ni-N4 structure. Ni@N-C gave a 31.2% yield of aromatic compounds from lignin hydrogenolysis, which was twice higher than that achieved by Ni cluster catalyst. Based on the experimental and DFT calculation results, the higher activity of Ni@N-C was attributed to its lower H2 dissociation energy and the reduced energy barriers of the transition states. The strategy described opens an efficient green avenue for preparing single-atom catalyst that possesses outstanding activity in lignin depolymerization.

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“…Over the past few years, various noble metals and niobium-based catalysts have been employed in HDO reactions with good catalytic results. − However, despite having a high hydrogenation capacity, the main drawback of using noble metals is their scarcity and high price. Therefore, the scientific community is looking for new active phases based on non-noble transition metals to reduce costs.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic Niobium-Based Catalysts Supported on SBA-15 for Hydrodeoxygenation of Anisole

Ballesteros‐Plata

Barroso-Martín

Cervantes

et al. 2021

Ind. Eng. Chem. Res.

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The effect of adding iron, cobalt or nickel to a prepared niobium-supported catalyst using mesoporous silica SBA-15 as a support was evaluated in the hydrodeoxygenation (HDO) reaction of anisole, chosen as a model compound in lignocellulosic biomass derived bio-oil. HDO activity as well as selectivity toward O-free products were highly dependent on the catalyst formulation: Ni incorporation showed the highest anisole conversion and selectivity to deoxygenated products, followed by Co and Fe counterparts. The activity was explained in terms of acidity, metal surface exposure and reducibility as a function of the interaction between the phases present. Regarding the characterization results, the better performance of NiNb/SBA-15 was associated with its lower acidity, higher Nb/Si surface exposure, NbO 2 /Nb 2 O 5 ratio and better interaction between Ni and Nb species.

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Catalytic transfer hydrogenolysis of lignin α-O-4 model compound 4-(benzyloxy)phenol and lignin over Pt/HNbWO6/CNTs catalyst

Cited by 38 publications

References 45 publications

Selective Catalytic Transfer Hydrogenation of Lignin to Alkyl Guaiacols Over NiMo/Al‐MCM‐41

Selective Catalytic Transfer Hydrogenation of Lignin to Alkyl Guaiacols Over NiMo/Al‐MCM‐41

Constructing Single-atom Ni on N-doped Carbon Via Chelation-anchored Strategy for the Hydrogenolysis of Lignin

Bimetallic Niobium-Based Catalysts Supported on SBA-15 for Hydrodeoxygenation of Anisole

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