Comparison of Dilute Organic and Sulfuric Acid Pretreatment for Enzymatic Hydrolysis of Bamboo

Li, Zhiqiang; Fei, Benhua; Jiang, Zehui

doi:10.15376/biores.9.3.5652-5661

Cited by 8 publications

(4 citation statements)

References 23 publications

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“…Pretreatment using a combination of microwave heating and oxalic acid for moso bamboo and corncob have been reported by Li, et al [7] and Deng, et al [8], respectively. However, such pretreatment for OPEFB has not been reported.…”

Section: Introductionmentioning

confidence: 95%

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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Abstract. Developing an effective pretreatment for the conversion of lignocellulosic biomass to ethanol is an important effort in reducing the cost of this process. Microwave-assisted pretreatment is considered a green technology that can effectively break down lignocellulosic structures. The objective of this study was to investigate the most effective temperature for microwave-assisted oxalic acid pretreatment regarding the structural characteristic changes of oil palm empty fruit bunches (OPEFB) fibers. The fibers were subjected to microwave-assisted oxalic acid pretreatment at 160-200 °C with 2.5 minutes heating time and a liquid to solid ratio of 10. The effectiveness of the pretreatment was determined based on its delignification selectivity, morphological characteristics, and functional group changes. Microwave irradiation of OPEFB fibers at 180 ºC was effective in increasing the cellulose content by 24%. This pretreatment resulted in 1.82 delignification selectivity. More than 50% of the hemicellulose of the OPEFB was removed after this treatment, which was confirmed by a decrease of the absorption bands of functional groups at 1732 cm -1 . The increase of pretreatment temperature disrupted the morphological structure of the OPEFB and removed its hemicellulose but did not change its functional groups and lignin content.

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Section: Introductionmentioning

confidence: 95%

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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“…Dicarboxylic organic acids can hydrolyse polymers of β-(1, 4)-glycosidic bonds more than sulfuric acid at equivalent solution pH [33,34]. Similarly, oxalic acid was found to be more effective than sulfuric acid in the hydrolysis of substrates such as beech and bamboo [35,36].…”

Section: Effects Of Catalyst Type and Concentrationmentioning

confidence: 99%

Organosolv pretreatment of oat husk using oxalic acid as an alternative organic acid and its potential applications in biorefinery

Şar

Arifa

Hilmy

et al. 2022

Biomass Conv. Bioref.

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In this study, ethanol organosolv treatment of oat husk and the potential effects of phosphoric acid and oxalic acid as alternatives to sulfuric acid were investigated. These acids were determined as effective as sulfuric acid to obtain high quality lignin and glucan and they can be used instead of sulfuric acid in solvent acidification. To determine the purity and recovery of both lignin and glucan, the effects of initial substrate amount, solid-to-liquid ratio, and amount of washing solutions were also examined using a one-factor-at-a-time strategy. Reducing the amount of washing solutions (water, solvent, or both) negatively affected lignin recovery, but it did not affect glucan recovery. The optimum conditions for pretreatment of the oat husk at higher glucan recovery were obtained with 50% aqueous ethanol acidified with oxalic acid at 210 °C for 90 min and solid-to-liquid ratio of 1:2. In the mixture of evaporated glucan-rich and hemicellulose-rich fractions obtained through the optimized condition, 4.62 g/L biomass containing 10.27% protein was produced by the cultivation of Aspergillus oryzae. The fractions obtained from organosolv treatment can be used to obtain value-added products such as biomass production, and thus contributing to a sustainable economy by integrating lignocellulosic substrate residues into the biorefinery.

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“…Second, enzymes are sensitive to temperature; high temperature cannot be used to accelerate the enzymatic hydrolysis rate because it will inhibit the activity of enzymes and even denature enzymes [18,19]. Despite the fact that acid catalysts (e.g., traditional mineral acids and solid acid catalysts) are also widely studied for cellulose hydrolysis, acid-catalyzed cellulose hydrolysis can lead to further degradation of glucose (e.g., 5-hydroxymethylfurfural (HMF) formation via dehydration) due to the unselective catalytic activity [20][21][22][23]. Further studies should be dedicated to developing novel catalysts to improve the yield and selectivity of glucose during cellulose hydrolysis with low cost, as well as developing effective technologies for the post-treatment of cellulose hydrolysate to be compatible with the yeasts.…”

Section: Introductionmentioning

confidence: 99%

Chemocatalytic Conversion of Lignocellulosic Biomass to Ethanol: A Mini-Review

Gong

Yang

et al. 2022

Catalysts

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Ethanol has been widely used as a clean fuel, solvent, and hydrogen carrier. Currently, ethanol is generally produced through fermentation of starch- and sugarcane-derived sugars (e.g., glucose and sucrose) or ethylene hydration. Its production from abundant and inexpensive lignocellulosic biomass would facilitate the development of green and sustainable society. Biomass-derived carbohydrates and syngas can serve as important feedstocks for ethanol synthesis via biological and chemical pathways. Nevertheless, the biological pathway for producing ethanol through biomass-derived glucose fermentation has the disadvantages of long production period and carbon loss. These issues can be effectively mitigated by chemocatalytic methods, which can readily convert biomass to ethanol in high yields and high atomic efficiency. In this article, we review the recent advances in chemocatalytic conversion of lignocellulosic biomass to ethanol, with a focus on analyzing the mechanism of chemocatalytic pathways and discussing the issues related to these methods. We hope this mini-review can provide new insights into the development of direct ethanol synthesis from renewable lignocellulosic biomass.

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Comparison of Dilute Organic and Sulfuric Acid Pretreatment for Enzymatic Hydrolysis of Bamboo

Cited by 8 publications

References 23 publications

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Organosolv pretreatment of oat husk using oxalic acid as an alternative organic acid and its potential applications in biorefinery

Chemocatalytic Conversion of Lignocellulosic Biomass to Ethanol: A Mini-Review

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