Pretreatment by NaOH swelling and then HCl regeneration to enhance the acid hydrolysis of cellulose to glucose

Sun, Binzhe; Peng, Gege; Duan, Lian; Xu, Aihua; Li, Xiaoxia

doi:10.1016/j.biortech.2015.08.009

Cited by 22 publications

(11 citation statements)

References 32 publications

(36 reference statements)

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“…Biomass sample (2 g) was mixed with NaOH solution (0–5% concentration, 200 mL) in a beaker (250 mL) at room temperature. The beaker with sample was sealed and frozen in a fridge (BCD-214 KA DZ, Qingdao Haier Co., Ltd., Shandong) at −18 °C for 24 h. After being thawed and vigorously stirred at 30 °C, the mixture was neutralized with dilute H 2 SO 4 . , The pretreated biomass sample was washed, filtered with 0.22 μm filter membrane, dried at −47 °C for 48 h in a vacuum freeze drier (PDU-1200, EYELA, Tokyo Rikakikai Co., Ltd.), and weighed to calculate recovery rate [(weight of pretreated biomass)/(weight of raw biomass) × 100%, wt %)] for hydrolysis and analysis.…”

Section: Methodsmentioning

confidence: 99%

“…Physical (e.g., ball-milling, microwave, and freeze), chemical (e.g., acid, alkali, ionic liquid, wet oxidation, and organosolv), physicochemical (e.g., steam explosion, hot water, and ammonia fiber explosion), and biological methods could be imposed on biomass samples. , Alkali pretreatment causes breakage of uronic bonds linking lignin to hemicellulose and partial delignification with slight hemicellulose solubilization that improves hydrolysis access to cellulose and hemicellulose. , It can be further combined with freeze pretreatment to facilitate efficient hydrolysis of carbohydrates to fermentable sugars . Alkali pretreated cellulose with freezing achieved a high glucose yield (29.1%) within 10 min at 160 °C with the presence of 5.1 wt % NaCl and 0.06 M HCl under microwave irradiation . But, an appropriate alkali concentration should be maintained to avoid biomass dissolution in alkali solution at low temperatures .…”

Section: Introductionmentioning

confidence: 99%

“…6 Alkali pretreated cellulose with freezing achieved a high glucose yield (29.1%) within 10 min at 160 °C with the presence of 5.1 wt % NaCl and 0.06 M HCl under microwave irradiation. 7 But, an appropriate alkali concentration should be maintained to avoid biomass dissolution in alkali solution at low temperatures. 8 Freeze pretreatment with water enhanced the enzymatic hydrolysis of rice straw with digestibility increasing from 48% to 84% at 37 °C for 48 h. 9 Freeze treatment combined with 2 wt % sulfuric acid at 80 °C for 16 h, enzymatic conversion of cellulose and hemicellulose of 67% from wheat straw was achieved at 50 °C.…”

Section: ■ Introductionmentioning

confidence: 99%

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One-Pot Microwave-Assisted Hydrolysis of Cellulose and Hemicellulose in Selected Tropical Plant Wastes by NaOH-Freeze Pretreatment

Fang

2017

ACS Sustainable Chem. Eng.

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In this work, in order to achieve one-pot hydrolysis of cellulose and hemicellulose in lignocellulosic biomass, freeze pretreatment with 0–5 wt % NaOH (3 wt% was chosen as the best concentration) and subsequent microwave-assisted dilute sulfuric acid hydrolysis were applied to tropical plant wastes. Single factor optimization of hydrolysis of the pretreated bagasse was studied, and the best conditions (140 °C, 30 s, substrate/solvent ratio of 1/60 and 0.4 M H2SO4) were further applied to Jatropha and Plukenetia hulls. Under the best conditions, yields of sugars from cellulose (glucose) and hemicellulose (xylose, mannose, and arabinose) in the pretreated bagasse were 84.0% and 92.7%, enhanced by 273.4% and 59.3% as compared with untreated sample, respectively. For the pretreated Jatropha and Plukenetia hulls, yields of glucose and hemicellulose sugars were 85.7% and 93.3% (increased by 225.9% and 75.4%) and 85.0% and 92.9% (increased by 214.8% and 81.4%), respectively.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

One-Pot Microwave-Assisted Hydrolysis of Cellulose and Hemicellulose in Selected Tropical Plant Wastes by NaOH-Freeze Pretreatment

Fang

2017

ACS Sustainable Chem. Eng.

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“…This was because that the DIWA pretreatment could swell the internal structure of the fibers to become looser and porous, which contributed to the contact area and penetration between the gum and the organic solvent. 14,50 During GO-OS treatment, organic alcohol reacted with the fibers and degraded hemicellulose and lignin into small fragments. Then the remaining fragments were dissolved in organic solution at the boiling stage.…”

Section: Chemical Composition Analysismentioning

confidence: 99%

Isolation and characterization of lignocellulosic fiber from jute bast by the organic solvent degumming system: an alkali-free method

Qin

Zhao

Liu

et al. 2021

Textile Research Journal

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Degumming is the dominant method for insolating lignocellulosic fibers in textile applications. Traditional alkaline degumming (TAL), as a common method, requires a high-concentration alkali and has been a severe challenge to the environment. In the research reported here, the possibility of innovative jute degumming by organic solvents 1-2 propylene glycol and a combination of additive green oxygen (GO-OS) was studied. The results revealed that fibers could be extracted by this system (under condition of 0.9% GO-OS, 180°C, 120 min), and obtained fibers with higher breaking tenacity (7.1 cN/dtex), yield (65.7%), breaking elongation (2.87%) and residual gum (11.7%), which all meet the requirement of the relevant Chinese Textile National Standards. Notably, the required reaction time (120 min) of the GO-OS system was 180 min shorter than that of the TAL method. Furthermore, the modifications introduced by the degumming effect on physicochemical aspects were characterized and confirmed by Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction. This study provides a promising degumming method for separating jute lignocellulose without acid and alkali consumption.

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“…[5] his research to pretreatment swelling NaOH and HCl regeration facilitate the process of depolymerizing cellulose into glucose. This is due to the amorphous hydrogel formed so that the structure is tenuous and easier to be hydrolyzed.…”

Section: Introductionmentioning

confidence: 99%

Effect H₂SO₄and Zymomonas mobilis concentration to bioethanol production bybintarofruit (cerbera manghas) substrate

Santoso

Fitriana

Carolina

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Bintaro fruit (Cerbera manghas) contains 36.945 of cellulose and 38% of lignin which is potential as a source of raw material for making bioethanol. The purpose of this research is to know the effectiveness of formula in producing bioethanol by the process of bintaro. The methods used in this research are pretreatment, delignification, hydrolysis, fermentation, and distillation. Pretreatment was performed by subcooling the substrate at 80 0 C followed by milling it up to 60 mesh. Delignification was performed by soaking the substrate in 100 0 C of 1N NaOH and 1 barr for 30 minutes. Hydrolysis was carried out with sulfuric acid catalyst (H2SO4) variations of 5.5%, 6.0%, and 6.5% at 120 0 C for 60 minutes. Fermentation with Zymomonas in variation of 1%, 3%, and 5% at room temperature for 3 days. The fermented filtrate was distilled at 73 0 C to obtain ethanol and tested the levels of ethanol with chromatography gas. The results showed that the highest levels of ethanol is 9.977% resulted from 6.5% of sulfuric acid hydrolysis and 5% of Zymomonas mobilis fermentation. The high levels of ethanol is supported by qualitative test result of the presence of reducing sugars with fehling yielding of 7002 ppm red brick tested quantitatively by nelson somogyi method. In conclusion, the level of bioethanol produced is directly proportional to the increased concentration of sulfuric acid and Zymomonas mobilis. The conclusion is levels of bioethanol produced is directly proportional to the increase in the concentration of sulfuric acid and Zymomonas mobilis is used.

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Pretreatment by NaOH swelling and then HCl regeneration to enhance the acid hydrolysis of cellulose to glucose

Cited by 22 publications

References 32 publications

One-Pot Microwave-Assisted Hydrolysis of Cellulose and Hemicellulose in Selected Tropical Plant Wastes by NaOH-Freeze Pretreatment

One-Pot Microwave-Assisted Hydrolysis of Cellulose and Hemicellulose in Selected Tropical Plant Wastes by NaOH-Freeze Pretreatment

Isolation and characterization of lignocellulosic fiber from jute bast by the organic solvent degumming system: an alkali-free method

Effect H₂SO₄and Zymomonas mobilis concentration to bioethanol production bybintarofruit (cerbera manghas) substrate

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Pretreatment by NaOH swelling and then HCl regeneration to enhance the acid hydrolysis of cellulose to glucose

Cited by 22 publications

References 32 publications

One-Pot Microwave-Assisted Hydrolysis of Cellulose and Hemicellulose in Selected Tropical Plant Wastes by NaOH-Freeze Pretreatment

One-Pot Microwave-Assisted Hydrolysis of Cellulose and Hemicellulose in Selected Tropical Plant Wastes by NaOH-Freeze Pretreatment

Isolation and characterization of lignocellulosic fiber from jute bast by the organic solvent degumming system: an alkali-free method

Effect H2SO4and Zymomonas mobilis concentration to bioethanol production bybintarofruit (cerbera manghas) substrate

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Product

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Effect H₂SO₄and Zymomonas mobilis concentration to bioethanol production bybintarofruit (cerbera manghas) substrate