Selective activation of the C–O bonds in lignocellulosic biomass for the efficient production of chemicals

Deng, Weiping; Zhang, Hongxi; Xue, Lei; Zhang, Qinghong; Wang, Ye

doi:10.1016/s1872-2067(15)60923-8

Cited by 50 publications

(33 citation statements)

References 144 publications

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“…This reaction is endothermic and requires heat energy (Figure 2). We hypothesize that the resulting Cu 0 interacts with hemicellulose in RS, therefore activating the C-O bond and promoting its cleavage; this leads to the degradation of hemicellulose into oligosaccharides and monosaccharides [41]. Besides, Cu also activates the C-O bond in cellulose and lignin.…”

Section: Reaction Mechanism Of Hemicellulose Conversion From Rice Strawmentioning

confidence: 99%

Efficient and Selective Catalytic Conversion of Hemicellulose in Rice Straw by Metal Catalyst under Mild Conditions

et al. 2020

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Rice straw is an abundant material with the potential to be converted into a sustainable energy resource. Transition-metal catalysis activated the C–O bond in the hemicellulose of raw rice straw, cleaving it to form monosaccharides. The mechanism of rice straw catalytic conversion had a synergistic effect due to in situ acid catalysis and metal catalysis. The conditions for the hydrogenation of hemicellulose from rice straw were optimized: catalyst to rice straw solid/solid ratio of 3:10, stirring speed of 600 r/min, temperature of 160 °C, time of 3 h, solid/liquid ratio of 1:15, and H2 gas pressure of 1.5 MPa. An excellent hemicellulose conversion of 97.3% with the yields of xylose and arabinose at 53.0% and 17.3%, respectively, were obtained. The results from FTIR and SEM experiments also confirmed the destruction of the rigidity and reticulate structure of rice straw after the catalytic reaction.

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Section: Reaction Mechanism Of Hemicellulose Conversion From Rice Strawmentioning

confidence: 99%

Efficient and Selective Catalytic Conversion of Hemicellulose in Rice Straw by Metal Catalyst under Mild Conditions

et al. 2020

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“…40%), mainly existing in the form of cellulose (35-50%), hemicellulose (25-30%), lignin (15-30%), and other extractives (1-5%), which limits its use as traditional fuels (Schutyser et al, 2018). To make better use of lignocellulosic biomass as energy, it is necessary to reduce the oxygen content not only by using the existing infrastructure, but by maximizing energy return (Deng et al, 2015a;Shivhare et al, 2021). To achieve this goal, it is necessary to develop a strategy for selectively controlling the C-O bond scission in biomass to remove oxygen (Krishna et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Selectivity Control of C-O Bond Cleavage for Catalytic Biomass Valorization

Jian

Yang

2022

Front. Energy Res.

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Increasing fossil fuels consumption and global warming have driven the global revolution towards renewable energy sources. Lignocellulosic biomass is the main source of renewable carbon-based fuels. The abundant intermolecular linkages and high oxygen content between cellulose, hemicellulose, and lignin limit the use of traditional fuels. Therefore, it is a promising strategy to break the above linkages and remove oxygen by selective catalytic cracking of C–O bond to further transform the main components of biomass into small molecular products. This mini-review discusses the significance of selectivity control in C–O bond cleavage with well-tailored catalytic systems or strategies for furnishing biofuels and value-added chemicals of high efficiency from lignocellulosic biomass. The current challenges and future opportunities of converting lignocellulose biomass into high-value chemicals are also summarized and analyzed.

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“…As the C-C bond cleavage and some C-O bond activation are required in conversion of cellulose and hexoses [35][36][37] , many multifunctional catalytic systems including homogeneous and heterogeneous catalysts have been designed and high yield of lactic acid are also achieved. In 2013, an elegant review paper summarized those efficient systems and discussed the transformation of different carbohydrates including hexoses and trioses to lactic acid [30] .…”

Section: Introductionmentioning

confidence: 99%