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

Yang, Xin; Zhao, Jing; Liang, Jinhua; Zhu, Jianliang

doi:10.3390/su122410601

Cited by 11 publications

(19 citation statements)

References 49 publications

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“…As a result, the RS cell wall had lost the function of the protective barrier for cellulose, and the catalyst could establish better contact with the inner layer to induce degradation into sugars. During hydrodepolymerization, increased cellulose conversion exposed the heterogeneous catalyst that was employed to degrade RS residues by hydrocracking the C-O bonds in cellulose [40]. Castoldi et al [37] also reported similar results, showing that the enzymatic hydrolysis of rice husk increased after pretreatment with liquid nitrogen.…”

Section: Effects On Hydrodepolymerization Of Rs Residues After Variou...mentioning

confidence: 83%

“…The hydrodepolymerization of pretreated RS residues was performed according to our previous study [40]. RS (10 g) pretreated using different methods was added to the reactor and subjected to hydrogen leaching for 3 h at 160 • C, wherein the solid-to-water ratio was 1:15, rotating speed was 600 r/min, and the ratio of catalyst to residue mass was 3:10.…”

Section: Hydrodepolymerization Of Pretreated Rs Residuesmentioning

confidence: 99%

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Comparative Study of Effective Pretreatments on the Structural Disruption and Hydrodepolymerization of Rice Straw

Yang

Liang

et al. 2023

Sustainability

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Rice straw (RS) is the most potentially renewable agricultural waste resource widely distributed in nature. Considering the complex recalcitrant structure and components of RS, three pretreatment methods, including high-temperature hydrothermal, medium-temperature microwave, and low-temperature cryocrushing pretreatment were performed. The components and structure of RS residues were examined and analyzed after the pretreatments. Pretreatment with hydrothermal yielded the lowest rice straw recovery (59.0%); after being pretreated at 180 °C for 10 min, the hemicellulose recovery was only 14.1%, and the removal efficiency of lignin was the largest (32.2%), which was 18.8% higher than that achieved from cryocrushing and microwave pretreatment, respectively. Pretreatment with cryocrushing yielded the highest recovery rates of rice straw (92.9%), hemicellulose and cellulose (88.8% and 90.4%, respectively). Results of scanning electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and the analysis of specific surface area and apertures demonstrated that all three pretreatments could effectively disrupt the structure of RS and reduce its cellulose crystallinity. The three pretreatments were found to enhance the hydrodepolymerization of RS residues. Furthermore, cryocrushing pretreatment yielded the highest cellulose conversion rate (56.8%), and the yields of glucose, xylose, and arabinose were 29.6%, 56.2%, and 17.8%, respectively. Apart from the use of acids and enzymes, hydrodepolymerization of RS was among the few methods that can effectively degrade cellulose, presenting an ideal solution for the degradation of biomass.

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Section: Effects On Hydrodepolymerization Of Rs Residues After Variou...mentioning

confidence: 83%

Section: Hydrodepolymerization Of Pretreated Rs Residuesmentioning

confidence: 99%

Comparative Study of Effective Pretreatments on the Structural Disruption and Hydrodepolymerization of Rice Straw

Yang

Liang

et al. 2023

Sustainability

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“… Chemical representation of a hemicellulose chain consisting of xylose and arabinose pentoses [ 23 ] (edited). …”

Section: Figurementioning

confidence: 99%

Lignocellulosic Bioethanol and Biobutanol as a Biocomponent for Diesel Fuel

et al. 2021

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In this paper, the fuel properties of mixtures of diesel fuel and ethanol and diesel fuel and butanol in the ratio of 2.5% to 30% were investigated. The physicochemical properties of the blends such as the cetane number, cetane index, density, flash point, kinematic viscosity, lubricity, CFPP, and distillation characteristics were measured, and the effect on fuel properties was evaluated. These properties were compared with the current EN 590+A1 standard to evaluate the suitability of the blends for use in unmodified engines. The alcohols were found to be a suitable bio-component diesel fuel additive. For most physicochemical properties, butanol was found to have more suitable properties than ethanol when used in diesel engines. The results show that for some properties, a butanol–diesel fuel mixture can be mixed up to a ratio of 15%. Other properties would meet the standard by a suitable choice of base diesel.

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“…Low bulk density, slow degradation, and elevated mineral percentage restrict its proper disposal while burning releases 0.05% GHG into the atmosphere. As it is composed of cellulose (32‐47%), hemicellulose (19‐27%), and lignin (5‐24%), 8 hydrolysis is indispensable to release simple sugar and then fermented to bioethanol however, lignin is remained intact during fermentation. Hence, it is converted to syngas (CO, CO 2 , and H 2 ) and subsequently fermented to bioethanol and other value‐added products by acetogens and/or anaerobic bacteria 1,9 .…”

Section: Introductionmentioning

confidence: 99%

Bioethanol production by Enterobacter hormaechei through carbon monoxide‐rich syngas fermentation

Pati

Mohanty

Mohapatra

et al. 2022

Intl J of Energy Research

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Summary Fossil fuel depletion and environmental contamination coupled with food vs fuel conflict motivated sustainable bioethanol production through syngas fermentation utilizing lignocellulosic biomass as feedstock. Herein, Enterobacter sp. RF2 strain was selected for the investigation out of the nine anaerobes that were screened for bioethanol production using the pyridinium chlorochromate assay. Under optimal conditions, Enterobacter sp. RF2 and the reference strain Clostridium ljungdahlii ATCC‐55383 produced 21.8 and 37.7 g/L of bioethanol in an anaerobic culture bottle and 25.3 and 39.6 g/L of bioethanol in a stirred tank reactor via syngas fermentation. Furthermore, infra‐red spectra and proton nuclear magnetic resonance illustrated chemical shift patterns of bioethanol. The high bioethanol producer was identified as Enterobacter hormaechei RF2 by in silico analysis. Here, it was reported for the first time that E. hormaechei RF2 is high ethanol tolerant and genetically stable bioethanol producer that can be exploited for pilot‐scale production to meet the rising demand for fossil fuels and lessen eco‐pollution. Thus, this research will pave the way for the commercialization of green chemicals which is the need of the hour in the current scenario. However, the cost of biomass conversion to bioethanol must be less than the existing price of gasoline to be competitive and get economic acceptance. Although this method is now at the pre‐commercialization stage due to lack because of techno‐economic feasibility, but usage of suitable substrates and concurrent production of different valuable products can make the entire process cost affordable. Therefore, by providing employment to the rural population through the exploitation of lignocellulosic biomass, eco‐friendly fuel to the customer, and lucrative fuel business to industries, it might thus hypothesize an intriguing future for our global economy.

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

Cited by 11 publications

References 49 publications

Comparative Study of Effective Pretreatments on the Structural Disruption and Hydrodepolymerization of Rice Straw

Comparative Study of Effective Pretreatments on the Structural Disruption and Hydrodepolymerization of Rice Straw

Lignocellulosic Bioethanol and Biobutanol as a Biocomponent for Diesel Fuel

Bioethanol production by Enterobacter hormaechei through carbon monoxide‐rich syngas fermentation

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