Evaluation of organosolv pretreatment for bioethanol production from lignocellulosic biomass: solvent recycle and process integration

Silva, André Rodrigues Gurgel da; Errico, Massimiliano; Rong, Ben-Guang

doi:10.1007/s13399-017-0292-4

Cited by 27 publications

(9 citation statements)

References 34 publications

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“…Organosolv pretreatment emerges as the only technology capable of isolating each component of the lignocellulosic biomass, attaining relatively pure lignin that can be sold as a by-product or converted into higher-value products in a biorefinery concept [99]. Organic solvents-such as methanol, ethanol, acetone, acetic acid, peracetic acid, and so on-are used with or without the addition of a catalyst reagent [100].…”

Section: Organosolvmentioning

confidence: 99%

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

et al. 2019

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Lignocellulosic biomass is recalcitrant due to its heterogeneous structure, which is one of the major limitations for its use as a feedstock for methane production. Although different pretreatment methods are being used, intermediaries formed are known to show adverse effect on microorganisms involved in methane formation. This review, apart from highlighting the efficiency and limitations of the different pretreatment methods from engineering, chemical, and biochemical point of views, will discuss the strategies to increase the carbon recovery in the form of methane by way of amending pretreatments to lower inhibitory effects on microbial groups and by optimizing process conditions.

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Section: Organosolvmentioning

confidence: 99%

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

et al. 2019

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“…The native cellulose of plants exists in both crystalline (I α and I β ) and non-crystalline forms. The crystalline part can be converted to a para-crystalline or amorphous form when treated with ethanol in the presence of acid catalysis [1]. Therefore, an increase in ethanol concentration is likely to disrupt the crystallinity of native cellulose, and consequently, more cellulose could be hydrolyzed and dissolved into the liquid hydrolysate.…”

Section: Carbohydrate and Byproduct Behaviormentioning

confidence: 99%

“…In recent decades, lignocellulosic biomass (LCB), such as forest residue, agricultural byproducts, and energy crops has become the most abundant renewable resource, as one trillion tons of LCB have been generated worldwide [1]. LCB has been regarded as a promising substitute resource for traditional fossil fuels [2], with the economic and environmental benefits of sustainable development, the reutilization of waste resources, eco-friendly technology, and the maintenance of carbon neutrality [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…However, to commercialize the production of high-value-added chemicals, an appropriate and effective fractionation technology should be applied to separate the three main components (cellulose, hemicellulose, and lignin) of the LCB into high-purity single substances. Various catalysts such as acids, alkalis, ionic liquids, and organic solvents have been studied as potential solvents for the fractionation process [9,10]; however, organic solvents are considered the most suitable solvents [1,11]. Specifically, the ethanol organosolv-fractionation process can recover high-purity cellulose from the treated solid and high-purity hemicellulose and lignin from liquid hydrolysate [12].…”

Section: Introductionmentioning

confidence: 99%

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Reaction Characteristics of Organosolv-Fractionation Process for Selective Extraction of Carbohydrates and Lignin from Rice Husks

Kim

Kwak²,

Kim

et al. 2021

Energies

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The organosolv-fractionation process can act as a biorefinery process because it can separate the main components of biomass, such as lignin and hemicellulose, with high purity. The ethanol-based organosolv-fractionation process was applied to separate carbohydrates and lignin from rice husks, and the extraction behavior was observed according to various reaction variables. Various reaction conditions such as different temperatures (150 °C, 170 °C, and 190 °C), reaction times (30 min, 60 min, and 120 min), and ethanol concentrations (40%, 60%, and 80%) were tested while maintaining the solid:liquid ratio (1:10) and sulfuric acid concentration (0.25 wt.%). Two optimal reaction conditions for the target components were chosen: for sugar recovery, 150 °C, 60 min, and 40% ethanol were used as condition 1, and for lignin recovery, 170 °C, 120 min, and 80% ethanol were used as condition 2. Under condition 1, 91.5% of the glucan was preserved in the residual solid, and 75.0% of the xylan was extracted from the liquid hydrolysate. For condition 2, 59.9% of the lignin was recovered. To properly choose and apply the correct fractionation method and conditions, the reaction behavior (such as carbohydrate retention and extraction), lignin solubilization, and precipitation should be carefully considered.

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“…Instead, a genetically modified strain was developed to overcome the detoxification process [20]. Another method is the organosolv pretreatment, which partially hydrolyzes the lignin bond with cellulose and hemicellulose, but most of the hemicellulose is solubilized [21,22]. The milder process involves using a hydrothermal process such as that used on OPEFB [23], prairie cordgrass [24], hardwood [25], and seeds of Euterpe oleracea [26].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Xylose Recovery in Oil Palm Empty Fruit Bunches for Xylitol Production

et al. 2020

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The hardest obstacle to make use of lignocellulosic biomass by using green technology is the existence of lignin. It can hinder enzyme reactions with cellulose or hemicellulose as a substrate. Oil palm empty fruit bunches (OPEFBs) consist of hemicellulose with xylan as the main component. Xylitol production via fermentation could use this xylan since it can be converted into xylose. Several pretreatment processes were explored to increase sugar recovery from lignocellulosic biomass. Considering that hemicellulose is more susceptible to heat than cellulose, the hydrothermal process was applied to OPEFB before it was hydrolyzed enzymatically. The purpose of this study was to investigate the effect of temperature, solid loading, and pretreatment time on the OPEFB hydrothermal process. The xylose concentration in OPEFB hydrolysate was analyzed using high-performance liquid chromatography (HPLC). The results indicated that temperature was more important than pretreatment time and solid loading for OPEFB sugar recovery. The optimum temperature, solid loading, and pretreatment time for maximum xylose recovery from pretreated OPEFB were 165 °C, 7%, and 60 min, respectively, giving a xylose recovery of 0.061 g/g of pretreated OPEFB (35% of OPEFB xylan was recovered).

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Evaluation of organosolv pretreatment for bioethanol production from lignocellulosic biomass: solvent recycle and process integration

Cited by 27 publications

References 34 publications

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

Reaction Characteristics of Organosolv-Fractionation Process for Selective Extraction of Carbohydrates and Lignin from Rice Husks

Optimization of Xylose Recovery in Oil Palm Empty Fruit Bunches for Xylitol Production

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