The effect of organosolv pretreatment variables on enzymatic hydrolysis of sugarcane bagasse

Mesa, Leyanis; González, E; Cara, Cristóbal; González, M.; Castro, Eulógio; Mussatto, Solange I.

doi:10.1016/j.cej.2011.02.003

Cited by 194 publications

(104 citation statements)

References 24 publications

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“…In a previous study with rice straw, a delignification yield of 48% was obtained using more severe conditions (60% ethanol, 1% H2SO4, and 70 ºC) . Higher delignification yields were obtained using organosolv at high temperatures, for sugar cane bagasse at 195 ºC and 30% ethanol (Mesa et al 2011), and wheat straw at 180 ºC, 40% ethanol, and 0.1% NaOH (Mesa et al 2011;Ruiz et al 2011). …”

Section: Selective Fractionation Of Rice Straw Hemicellulosesmentioning

confidence: 99%

Fractionation of Hemicelluloses and Lignin from Rice Straw by Combining Autohydrolysis and Optimised Mild Organosolv Delignification

Moniz¹,

Lino²,

Duarte³

et al. 2015

BioResources

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An integrated strategy was followed to valorise rice straw, one of the most relevant biomass feedstocks available worldwide, to selectively recover solubilised hemicelluloses and lignin. The pathway encompassed the use of autohydrolysis to hydrolyse the hemicelluloses and an ethanol-based organosolv process to solubilise lignin. Several autohydrolysis conditions were assayed with the best results obtained at 210 ºC (log R0 4.15), which enabled high removal of hemicelluloses, yielding an oligosaccharide-rich hydrolysate and a treated biomass with low content of hemicelluloses and enriched in cellulose and lignin. The effects of ethanol concentration (5 to 75%), and reaction time (0 to 24 h) on lignin removal under mild temperature (30 ºC) were studied. In optimal conditions (60.5% ethanol, 24h) the delignification yield reached 42%, whereas glucan solubilisation was below 17%. Lignin solubilisation yield was not influenced by the organosolv treatment duration while ethanol concentration favored the delignification up to 60.5% ethanol. The organosolv liquors contained economic interesting ligninderived compounds such as vanillin, ferulic, and coumaric acids. The chemical composition and enzymatic digestibility of the treated biomass from autohydrolysis and organosolv delignification were compared, with the latter presenting an almost 10% higher enzymatic digestibility than the former.

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Section: Selective Fractionation Of Rice Straw Hemicellulosesmentioning

confidence: 99%

Fractionation of Hemicelluloses and Lignin from Rice Straw by Combining Autohydrolysis and Optimised Mild Organosolv Delignification

Moniz¹,

Lino²,

Duarte³

et al. 2015

BioResources

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“…Other variations involve the combined use of acid and basic catalysts [146], microwave-assisted organosolv [161], and the avoidance of catalysts [162]. In another variation, the biomass is treated with the inclusion of ferric sulphate and sodium hydroxide to the biomass/liquor (formic acid and hydrogen peroxide) mixture.…”

Section: Process Variationsmentioning

confidence: 99%

“…Park et al [144] evaluated the effectiveness of acidic (H 2 SO 4 ), basic (NaOH), and neutral (MgCl 2 ) catalysts on pine and found the acid as the most efficient in terms of the ethanol yield; however, an increase in the concentration of the base from 1 to 2% had a positive effect on digestibility. Organic solvents/acids that have been used as catalysts include formic, oxalic, acetylsalicylic, salicylic acid, methanol, ethanol, acetone, ethylene glycol, triethylene glycol, and tetrahydrofurfuryl alcohol [13,[145][146][147]. The use of CO 2 as a catalyst did not improve process yields on pretreatment of willow wood [151].…”

Section: Process Descriptionmentioning

confidence: 99%

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Bensah

Mensah

2013

International Journal of Chemical Engineering

277

105

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Pretreatment of lignocellulose has received considerable research globally due to its influence on the technical, economic and environmental sustainability of cellulosic ethanol production. Some of the most promising pretreatment methods require the application of chemicals such as acids, alkali, salts, oxidants, and solvents. Thus, advances in research have enabled the development and integration of chemical-based pretreatment into proprietary ethanol production technologies in several pilot and demonstration plants globally, with potential to scale-up to commercial levels. This paper reviews known and emerging chemical pretreatment methods, highlighting recent findings and process innovations developed to offset inherent challenges via a range of interventions, notably, the combination of chemical pretreatment with other methods to improve carbohydrate preservation, reduce formation of degradation products, achieve high sugar yields at mild reaction conditions, reduce solvent loads and enzyme dose, reduce waste generation, and improve recovery of biomass components in pure forms. The use of chemicals such as ionic liquids, NMMO, and sulphite are promising once challenges in solvent recovery are overcome. For developing countries, alkalibased methods are relatively easy to deploy in decentralized, low-tech systems owing to advantages such as the requirement of simple reactors and the ease of operation.

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“…This method is also considered as one of chemical pretreatment (Zhao et al, 2009), that includes the application of organic solvents e.g. acetone, ethanol, ethylene glycol, methanol, and tetrahydro furfuryl alcohol (Mesa et al, 2011) Usually, acid, salt or base are the catalysts of this process (Bajpai, 2016). Organic or inorganic acids (sulfuric acid and hydrochloric acids) and bases (lime, sodium hydroxide, ammonia) are used as catalysts (Zhao et al, 2009).…”

Section: Organosolv Pretreatmentmentioning

confidence: 99%

Bioethanol Production From Lignocellulosic Biomass by Environment-Friendly Pretreatment Methods: A Review

Tayyab¹

2018

Appl. Ecol. Env. Res.

119

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Abstract. Lignocellulosic biomass is one of the abundant renewable bioresources on earth. Its chemical composition, i.e., lignin hinders ethanol production and commercialization. Pretreatment processes are vital for efficient separation of the complex interlinked components and enhance the availability of every component, i.e., cellulose and hemicellulose. However, for the bioethanol production, a major barrier is the removal of strong lignin component which is highly resistant to solubilization and a major inhibitor for hydrolysis of cellulose and hemicellulose. Pretreatment of biomass is necessary to make it susceptible to microorganisms, enzymes, and pathogens. Consequently, for the ethanol production, pretreatment of lignocellulosic biomass process is very costly. The initial pretreatment approaches include physical, physicochemical and biological methods. It found out that; pretreatment methods have a significant impact on efficient production of ethanol from biomass. However, extensive research is still necessary for the development of new and more efficient pretreatment processes for conversion of lignocellulosic biomass to ethanol. Present review article presents recent development on lignocellulose biomass pretreatment. We discussed the different pretreatment methods along advantages, disadvantages, and challenges for bioethanol production. This review includes benefits and drawbacks and chemical, physical, physiochemical and biological pretreatment along with existing problems. For the production of ethanol, this review will help researchers regarding selection, development and further planning of pretreatment for different lignocellulosic residues.

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The effect of organosolv pretreatment variables on enzymatic hydrolysis of sugarcane bagasse

Cited by 194 publications

References 24 publications

Fractionation of Hemicelluloses and Lignin from Rice Straw by Combining Autohydrolysis and Optimised Mild Organosolv Delignification

Fractionation of Hemicelluloses and Lignin from Rice Straw by Combining Autohydrolysis and Optimised Mild Organosolv Delignification

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Bioethanol Production From Lignocellulosic Biomass by Environment-Friendly Pretreatment Methods: A Review

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