Bioethanol from Lignocellulosic Biomass

Wyman, Charles E.; Cai, Charles M.; Kumar, Rajeev

doi:10.1007/978-1-4939-7813-7_521

Cited by 15 publications

(10 citation statements)

References 161 publications

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“…38 In addition, a higher sugar concentration could be obtained aer the enzymatic hydrolysis at higher solid loading, and theoretically higher sugar concentration could yield a higher ethanol concentration aer fermentation, which could reduce the energy consumption and process cost of distillation. 39 It was reported that the downstream distillation could be economically feasible only with the ethanol concentration no less than 4%, which meant that the corresponding solid loading of enzymatic hydrolysis should be no less than 20%, generally. 23,31 Therefore, the enzymatic hydrolysis at 20% of solid loading was further studied.…”

Section: Enzymatic Hydrolysis Of Pretreated Ccrmentioning

confidence: 99%

A clean and effective potassium hydroxide pretreatment of corncob residue for the enhancement of enzymatic hydrolysis at high solids loading

Chi

Liu

et al. 2019

RSC Adv.

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Section: Enzymatic Hydrolysis Of Pretreated Ccrmentioning

confidence: 99%

A clean and effective potassium hydroxide pretreatment of corncob residue for the enhancement of enzymatic hydrolysis at high solids loading

Chi

Liu

et al. 2019

RSC Adv.

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“…THF has uniquely lower boiling point so that it can be simply boiled out of the solution after pretreatment in order to induce lignin precipitating out of solution and to recover THF. This avoids potentially more complicated and energy-intensive solvent recovery methods, such as CO 2 -induced phase modification or anti-solvent extraction, that have been proposed for the recovery of high boiling co-solvents (Wyman et al, 2016). In previous studies, CELF has demonstrated wide operating flexibility in terms of reaction conditions such as temperature, solvent ratio, duration, and acid loading to finely control the extent of cellulose and lignin dissolution independently to support sugar hydrolysis at lower severities and to support tandem sugar hydrolysis and dehydration to furfurals at higher severities (Cai et al, 2013;Nguyen et al, 2016;Seemala et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Effects of CELF Pretreatment Severity on Lignin Structure and the Lignin-Based Polyurethane Properties

Wang¹,

Sengupta²,

Scheidemantle³

et al. 2020

Front. Energy Res.

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“…Cellulosic biomass represents a renewable, low-cost resource that can be converted into biofuels and biochemicals [1, 2]. Poplar, as a fast growing, widely distributed, short rotation period crop, is considered as a suitable feedstock for this process [3, 4].…”

Section: Introductionmentioning

confidence: 99%

Production of xylooligosaccharides and monosaccharides from poplar by a two-step acetic acid and peroxide/acetic acid pretreatment

Wen

Tian

Wang

et al. 2019

Biotechnol Biofuels

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Background Populus (poplar) tree species including hybrid varieties are considered as promising biomass feedstock for biofuels and biochemicals production due to their fast growing, short vegetative cycle, and widely distribution. In this work, poplar was pretreated with acetic acid (AC) to produce xylooligosaccharides (XOS), and hydrogen peroxide–acetic acid (HPAC) was used to remove residual lignin in AC-pretreated poplar for enzymatic hydrolysis. The aim of this work is to produce XOS and monosaccharides from poplar by a two-step pretreatment method. Results The optimal conditions for the AC pretreatment were 170 °C, 5% AC, and 30 min, giving a XOS yield of 55.8%. The optimal HPAC pretreatment conditions were 60 °C, 2 h, and 80% HPAC, resulting in 92.7% delignification and 87.8% cellulose retention in the AC-pretreated poplar. The two step-treated poplar presented 86.6% glucose yield and 89.0% xylose yield by enzymatic hydrolysis with a cellulases loading of 7.2 m/g dry mass. Very high glucose (93.8%) and xylose (94.6%) yields were obtained with 14.3 mg cellulases/g dry mass. Both Tween 80 and β-glucosidase enhanced glucose yield of HPAC-pretreated poplar by alleviating the accumulation of cellobiose. Under the optimal conditions, 6.9 g XOS, 40.3 g glucose, and 8.9 g xylose were produced from 100 g poplar. Conclusions The AC and HPAC pretreatment of poplar represented an efficient strategy to produce XOS and fermentable sugars with high yields. This two-step pretreatment was a recyclable benign and advantageous scheme for biorefinery of the poplar into XOS and monosaccharides. Electronic supplementary material The online version of this article (10.1186/s13068-019-1423-x) contains supplementary material, which is available to authorized users.

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Bioethanol from Lignocellulosic Biomass

Cited by 15 publications

References 161 publications

A clean and effective potassium hydroxide pretreatment of corncob residue for the enhancement of enzymatic hydrolysis at high solids loading

A clean and effective potassium hydroxide pretreatment of corncob residue for the enhancement of enzymatic hydrolysis at high solids loading

Effects of CELF Pretreatment Severity on Lignin Structure and the Lignin-Based Polyurethane Properties

Production of xylooligosaccharides and monosaccharides from poplar by a two-step acetic acid and peroxide/acetic acid pretreatment

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