Process optimization for deep eutectic solvent pretreatment and enzymatic hydrolysis of sugar cane bagasse for cellulosic ethanol fermentation

Liu, Yao; Zheng, Xiaojie; Tao, Shunhui; Hu, Lei; Zhang, Xiaodong; Lin, Xiaoqing

doi:10.1016/j.renene.2021.05.131

Cited by 80 publications

(13 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…stated that the enzymatic hydrolysis yield of wheat straw was 75.8 mol% after ionic liquid pretreatment and increased to 91.3 mol% after lignin extraction from pretreated material. The cellulose enzymatic hydrolysis conversion rate was reported as 38.76% for untreated sugar cane bagasse and increased to 88.23% after DES pretreatment 49 . Morais et al 50 .…”

Section: Resultsmentioning

confidence: 99%

“…The cellulose enzymatic hydrolysis conversion rate was reported as 38.76% for untreated sugar cane bagasse and increased to 88.23% after DES pretreatment. 49 Morais et al 50 reported the glucan-to-glucose yield of high-pressure CO 2 /H 2 O-treated wheat straw as 82.2 mol%, while the untreated material had a 34.3 mol % glucan-to-glucose yield. Increasing enzymatic hydrolysis yield after extrusion and/or alkali treatment has been also reported in the literature for different types of lignocellulosic materials, such as corn stover, 45 barley straw 41 and corn cob.…”

Section: Effect Of Alkali Combined Extrusion Pretreatment On Chemical...mentioning

confidence: 99%

See 1 more Smart Citation

Statistical investigation of the bioprocess conditions of alkali combined twin‐screw extrusion pretreatment to enhance fractionation and enzymatic hydrolysis of bulgur bran

et al. 2022

View full text Add to dashboard Cite

BACKGROUND Bulgur bran (BB) is a potential source for the production of value‐added products such as fermentable sugars and xylooligosaccharides (XOs). In this study, alkali combined twin‐screw extrusion pretreatment was performed and statistically optimized to enhance fractionation and enzymatic hydrolysis of BB. The pretreatment conditions (barrel temperature, screw speed and alkali impregnation) were optimized by Box–Behnken design (BBD) to obtain the highest hemicellulose separation from BB. The obtained fractions were analyzed for the production of fermentable sugars and XOs. RESULTS The results revealed that twin‐screw extrusion of BB performed at 67 °C barrel temperature and 250 rpm screw speed after alkali impregnation at 0.02 g alkali g−1 biomass concentration provided 40.4% higher hemicellulose separation yield compared to the untreated BB. Alkali combined twin‐screw extrusion pretreatment increased the enzymatic hydrolysis yield of BB fourfold, whereas a 13‐fold increase was achieved after the separation of hemicellulose from pretreated BB. Xylose (X1)‐free xylobiose (X2) was the main product after xylanase hydrolysis of hemicellulose fraction. SEM images confirmed the morphological modifications in BB, which were in agreement with the enhanced fractionation performance and the higher enzymatic hydrolysis yield. CONCLUSION The results of this study suggested that pretreatment by alkali combined twin‐screw extrusion followed by alkali extraction could be a reliable and effective process for fractionation of BB and production of fermentable sugars and XOs. © 2022 Society of Chemical Industry.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Alkali Combined Extrusion Pretreatment On Chemical...mentioning

confidence: 99%

Statistical investigation of the bioprocess conditions of alkali combined twin‐screw extrusion pretreatment to enhance fractionation and enzymatic hydrolysis of bulgur bran

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The same experimental procedure used in our previous study was used to prepared several types of DESs (see Scheme ). , The viscosities of different DESs are listed in Table S2. Typically, both HBDs and HBAs were weighed in the required molar ratio in a round bottom flask and mixed with a mechanical stirrer at 600 rpm.…”

Section: Methodsmentioning

confidence: 99%

Insights into the Play of Novel Brønsted Acid-Based Deep Eutectic Solvents for the Conversion of Glucose into 5-Hydroxymethylfurfural without Additional Catalysts

Tao

Zhang

et al. 2022

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

5-Hydroxymethylfurfural (5-HMF) is a versatile bio-platform chemical that connects biomass to a variety of different fuels, chemicals, and materials. In this work, novel Brønsted acid-based deep eutectic solvents (DESs) with both solvent and catalytic functionalities for glucose dehydration into 5-HMF were developed without the need of additional metal salt catalysts or heterogeneous catalysts. The types of hydrogen bond donor (HBD) and hydrogen bond acceptor (HBA), the ratio of HBD to HBA of the DES, heating time, reaction temperature, initial glucose concentration, and moisture content of the DES were systematically investigated to reveal the interplay of the DES in the conversion of glucose to 5-HMF. The most effective DES was found to be triethyl benzyl ammonium chloride (TEBAC)/formic acid (FA) (molar ratio: 2:1) with a 5-HMF yield of 30.5 ± 1.0% in glucose dehydration and approximately 100% glucose conversion (initial glucose concentration: 2.5 wt %) in 60 min at 150 °C. Most importantly, after five cycles, the TEBAC/FA (1:2) DES retained high stability and catalytic activity, with the yield of 5-HMF remaining 30.1 ± 0.5%. Interestingly, as the water content of the DES increased to 70%, the 5-HMF yield increased to 36.5 ± 1.0% along with an 8.01 ± 1.4% yield of levulinic acid. The finding of this study provided insights into the TEBAC/FA (1:2) DES with dual capabilities that might support more efficient bio-based commodity chemical production methods.

show abstract

“…Compared with the first generation based on crops (corn, sugar cane, etc. ), the second generation of bioethanol could be directly produced using a wide range of cellulose-based biomass, like straw, , bagasse, and other agricultural/forestry wastes. As a result, the application of bioethanol could be of great importance not only to the energy and food/crops security, but also to the achievement of carbon neutrality .…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Carbon Nanotube Filled PDMS Hybrid Membranes for Enhanced Ethanol Recovery

Tian

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Ethanol separation via the pervaporation process has shown growing application potential in solvent recovery and the bioethanol industry. In the continuous pervaporation process, polymeric membranes such as hydrophobic polydimethylsiloxane (PDMS) have been developed to enrich/ separate ethanol from dilute aqueous solutions. However, its practical application remains largely limited due to the relatively low separation efficiency, especially in selectivity. In view of this, hydrophobic carbon nanotube (CNT) filled PDMS mixed matrix membranes (MMMs) aimed at high-efficiency ethanol recovery were fabricated in this work. The filler K-MWCNTs was prepared by functionalizing MWCNT-NH 2 with epoxycontaining silane coupling agent (KH560) to improve the affinity between fillers and PDMS matrix. With K-MWCNT loading increased from 1 wt % to 10 wt %, membranes showed higher surface roughness and water contact angle was improved from 115°to 130°. The swelling degree of K-MWCNT/ PDMS MMMs (2 wt %) in water were also reduced from 10 wt % to 2.5 wt %. Pervaporation performance for K-MWCNT/PDMS MMMs under varied feed concentrations and temperatures were evaluated. The results supported that the K-MWCNT/PDMS MMMs at 2 wt % K-MWCNT loading showed the optimum separation performance (compared with pure PDMS membranes), with the separation factor improved from 9.1 to 10.4, and the permeate flux increased by 50% (40−60 °C, at 6 wt % feed ethanol concentration). This work provides a promising method for preparing a PDMS composite with both high permeate flux and selectivity, which showed great potential for bioethanol production and alcohol separation in industry.

show abstract

Process optimization for deep eutectic solvent pretreatment and enzymatic hydrolysis of sugar cane bagasse for cellulosic ethanol fermentation

Cited by 80 publications

References 66 publications

Statistical investigation of the bioprocess conditions of alkali combined twin‐screw extrusion pretreatment to enhance fractionation and enzymatic hydrolysis of bulgur bran

Statistical investigation of the bioprocess conditions of alkali combined twin‐screw extrusion pretreatment to enhance fractionation and enzymatic hydrolysis of bulgur bran

Insights into the Play of Novel Brønsted Acid-Based Deep Eutectic Solvents for the Conversion of Glucose into 5-Hydroxymethylfurfural without Additional Catalysts

Fabrication and Characterization of Carbon Nanotube Filled PDMS Hybrid Membranes for Enhanced Ethanol Recovery

Contact Info

Product

Resources

About