Catalytic hydrogenolysis of lignin β-O-4 aryl ether compound and lignin to aromatics over Rh/Nb2O5 under low H2 pressure

Guan, Weixiang; Chen, Xiao; Hu, Haoquan; Tsang, Chi Wing; Zhang, Jie; Lin, Carol Sze Ki; Liang, Changhai

doi:10.1016/j.fuproc.2020.106392

Cited by 47 publications

(33 citation statements)

References 39 publications

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“…Limited literature reports suggest that high temperature and low H 2 pressure can suppress hydrogenation and promote aromatic monomers production over noble metals . Liang and co-workers reported PPE hydrogenolysis over M/Nb 2 O 5 (M = Pt, Pd, Ru, and Rh) catalysts at 260 °C and 1.0 MPa H 2 in n -decane . All catalysts were active and selective to aromatic hydrocarbons, with Rh/Nb 2 O 5 conferring 99% conversion and 83% selectivity to aromatics.…”

Section: Catalytic Hydrogenolysismentioning

confidence: 99%

Hydrogenolysis of Lignin-Derived Aromatic Ethers over Heterogeneous Catalysts

Shivhare

Jampaiah

Bhargava

et al. 2021

ACS Sustainable Chem. Eng.

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Global temperature has risen >1 °C since the preindustrial era, resulting in well-documented adverse climate impacts including extreme weather (floods, droughts, storms, and heat waves), a rise in sea level accompanying melting polar and glacial ice, and disrupted crop growth. These changes are closely correlated with anthropogenic greenhouse gas emissions, predominantly arising from the combustion of nonrenewable fossil fuels. Lignin derived from lignocellulose is the second most abundant biopolymer on Earth, and a rich source of renewable aromatic hydrocarbons to replace those currently obtained from fossil resources. Lignin depolymerization by cleavage of C–O and C–C linkages in the biopolymer can be achieved by direct pyrolysis or catalytic transformations, involving oxidation, hydrolysis, or hydrogenolysis reactions. Hydrogenolysis, in which H2 gas (or in-situ generated reactive H species) is supplied to lignin under relatively mild conditions, has attracted significant attention. This Perspective summarizes recent progress in the development of heterogeneous catalysts for the cleavage of C–O linkages in lignin-derived aromatic ethers by hydrogenolysis: it encompasses strategies using H2, hydrogen transfer, and photocatalysis for aromatic monomers production, and the determination of structure–activity relationships and underlying reaction mechanisms.

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Section: Catalytic Hydrogenolysismentioning

confidence: 99%

Hydrogenolysis of Lignin-Derived Aromatic Ethers over Heterogeneous Catalysts

Shivhare

Jampaiah

Bhargava

et al. 2021

ACS Sustainable Chem. Eng.

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“…The conversion of lignin into valuable aromatic compounds under low hydrogen pressure provides a broad prospect. 110 Reductive catalytic fractionation (RCF) of lignocellulose over heterogeneous catalysts can effectively recover high-yield phenolic monomers. Wang et al 133 conducted reduction experiments on birch on N-doped carbon-supported catalysts.…”

Section: Hydrogen Reductionmentioning

confidence: 99%

“…The conversion of lignin into valuable aromatic compounds under low hydrogen pressure provides a broad prospect. 110 …”

Section: Reductionmentioning

confidence: 99%

Review on the preparation of fuels and chemicals based on lignin

Ren

Jiang

et al. 2022

RSC Adv.

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“…Noble metals have a high hydrogen dissociation capacity and reduce metal oxides to metal hydroxides or create oxygen vacancies to catalyze the dehydration of hydroxyl groups. As a result, the design of catalysts, with metal oxidation and noble metals, has emerged as a prominent strategy for the selective cleavage of C-OH (Guan et al, 2020;Stephens et al, 2020).…”

Section: Straight Chain Diol Productionmentioning

confidence: 99%

Recent Advances in the Catalytic Hydroconversion of 5-Hydroxymethylfurfural to Valuable Diols

Huang

Wang

Lei³

et al. 2022

Front. Chem.

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Biomass, a globally available resource, is a promising alternative feedstock for fossil fuels, especially considering the current energy crisis and pollution. Biomass-derived diols, such as 2,5-bis(hydroxymethyl)furan, 2,5-bis(hydroxymethyl)-tetrahydrofuran, and 1,6-hexanediol, are a significant class of monomers in the polyester industry. Therefore, the catalytic conversion of biomass to valuable diols has received extensive research attention in the field of biomass conversion and is a crucial factor in determining the development of the polyester industry. 5-Hydroxymethylfurfural (HMF) is an important biomass-derived compound with a C6-furanic framework. The hydroconversion of HMF into diols has the advantages of being simple to operate, inexpensive, environmentally friendly, safe, and reliable. Therefore, in the field of diol synthesis, this method is regarded as a promising approach with significant industrialization potential. This review summarizes recent advances in diol formation, discusses the roles of catalysts in the hydroconversion process, highlights the reaction mechanisms associated with the specificities of each active center, and provides an outlook on the challenges and opportunities associated with the research on biomass-derived diol synthesis.

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Catalytic hydrogenolysis of lignin β-O-4 aryl ether compound and lignin to aromatics over Rh/Nb2O5 under low H2 pressure

Cited by 47 publications

References 39 publications

Hydrogenolysis of Lignin-Derived Aromatic Ethers over Heterogeneous Catalysts

Hydrogenolysis of Lignin-Derived Aromatic Ethers over Heterogeneous Catalysts

Review on the preparation of fuels and chemicals based on lignin

Recent Advances in the Catalytic Hydroconversion of 5-Hydroxymethylfurfural to Valuable Diols

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