Enzymatic hydrolysis and ethanol yields of combined surfactant and dilute ammonia treated sugarcane bagasse

Cao, Shuo; Aita, Giovanna M.

doi:10.1016/j.biortech.2012.12.170

Cited by 123 publications

(60 citation statements)

References 33 publications

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“…On the contrary, as reported in a previous publication, surfactants actually did not consistently enhance the enzymatic hydrolysis of pure cellulose [31][32][33]. However, the addition of surfactant in the pretreatment could improve the conversion of cellulose [16][17][18][19][20]. The chemical structure of chitosan is similar to cellulose, with the hydroxyl group at position C2 replaced by an amino group or an acetamido group [34].…”

Section: Characterisations Of Hydrolyzed Chitosan Productcontrasting

confidence: 50%

Enhanced Enzymatic Hydrolysis of Chitosan by Surfactant Addition

Rokhati

Susanto

Haryani

et al. 2017

Period. Polytech. Chem. Eng.

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Section: Characterisations Of Hydrolyzed Chitosan Productcontrasting

confidence: 50%

Enhanced Enzymatic Hydrolysis of Chitosan by Surfactant Addition

Rokhati

Susanto

Haryani

et al. 2017

Period. Polytech. Chem. Eng.

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“…After pretreatment with 1% NaOH and regeneration, the diffraction intensity of substrates was typical of cellulose I. Cellulose I properties are close to those of cellulose, with a high crystallinity and distinct peaks at the angles (16 o , 22 o and 35 o ) described above. These results were similar and comparable to previously published reports [19][20][21][22][23]. The increase in the crystalline index of substrate pretreated with NaOH was mainly caused by the liquefaction of the amorphous parts (lignin and hemicellulose).…”

Section: Characterization Of Pretreated Coconut Coir Dustsupporting

confidence: 92%

“…These are the typical patterns for crystalline cellulose I, which have been studied by other authors [19,[21][22][23]. After pretreatment with 1% NaOH and regeneration, the diffraction intensity of substrates was typical of cellulose I. Cellulose I properties are close to those of cellulose, with a high crystallinity and distinct peaks at the angles (16 o , 22 o and 35 o ) described above.…”

Section: Characterization Of Pretreated Coconut Coir Dustsupporting

confidence: 66%

Comparative Study of the Preparation of Reducing Sugars Hydrolyzed from High-Lignin Lignocellulose Pretreated with Ionic Liquid, Alkaline Solution and Their Combination

et al. 2015

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Abstract. The ionic liquid [MMIM][DMP] was synthesized from the reactants methyl imidazole [MIM] and trimethylphosphate [TMP] and verified using 1 HNMR and FTIR. Coconut coir dust was pretreated with a 1% alkaline solution. Its crystalline structure increased significantly due to the dissolution of lignin and hemicelluloses under alkaline conditions, exposing the cellulose. After NaOH and IL were employed, the XRD showed that peak (002) decreased significantly and peak (101) almost vanished. This significant decrease in crystallinity was related to the alteration of the substrate from the cellulose I structure to the cellulose II structure. The pretreated substrates were hydrolyzed to convert them to reducing sugars by pure cellulase and xylanase, and the reaction was conducted at 60°C, pH 3, for 12 or 48 hours. The yields of sugar hydrolyzed from untreated and NaOH-pretreated substrates were 0.07 and 0.12 g sugar/g lignocellulose, respectively. Pretreatment with IL or the combination of NaOH+IL resulted in yields of reducing sugars of 0.11 and 0.13 g/g, respectively. These findings showed that IL pretreatment of the high-lignin lignocellulose is a new prospect for the economical manufacture of reducing sugars and bioethanol in the coming years.

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“…In this investigation, XRD patterns were investigated at distinct three angles, 2θ = 16.00 o , 22.00 o , and 35.00 o , which correlated to reflector planes of (101), (002) and (040) in the cellulosic crystal as shown in Figure 6 [20][21][22][25][26].…”

Section: Characterization Of Pretreated Coconut Coir Dustmentioning

confidence: 99%

Preparation of Reducing Sugar Hydrolyzed from High-Lignin Coconut Coir Dust Pretreated by the Recycled Ionic Liquid [mmim][dmp] and Combination with Alkaline

Sangian

Kristian

Rahma

et al. 2014

Bull. Chem. React. Eng. Catal.

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This study aims to produce reducing sugar hydrolyzed from substrate, coconut coir dust pretreated by recycled ionic liquid and its combination with alkaline. The 1H NMR and FTIR were performed to ver-ify the synthesized ionic liquid methylmethylimidazolium dimethyl phosphate ([mmim][dmp]). The structure of pretreated substrates was analyzed by XRD measurement. The used ionic liquid was recy-cled twice to re-employ for substrate pretreatment. The treated- and untreated-coconut coir dust were hydrolyzed into sugars using pure cellulase. The reaction, which called an enzymatic hydrolysis, was conducted at 60 °C, pH 3, for 48 h. The yields of sugar hydrolyzed from fresh IL-pretreated, 1R*IL-pretreated and 2R*IL-pretreated substrates were of 0.19, 0.15 and 0.15 g sugar / g cellu-lose+hemicellulose, respectively. Pretreatment with NaOH or the combination of NaOH+IL resulted in yields of reducing sugars of 0.25, 0.28 g/g, respectively. When alkaline combined with the recycled ionic liquids, NaOH+1R*IL, NaOH+2R*IL in the pretreatment, the yields of sugar were relatively similar to those obtained using alkaline followed by fresh ionic liquid. If the mixture enzymes, cellu-lase+xylanase, used to liberate sugars from fresh IL-pretreated, or recycled IL-pretreated substrates, the amount of sugar (concentration or yield) increased slightly compared to that employing a single cel-lulase. These findings showed that recycled IL pretreatment of the high-lignin lignocellulose, coconut coir dust, is a new prospect for the economical manufacture of fermentable sugars and biofuel in the coming years. © 2015 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0)

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Enzymatic hydrolysis and ethanol yields of combined surfactant and dilute ammonia treated sugarcane bagasse

Cited by 123 publications

References 33 publications

Enhanced Enzymatic Hydrolysis of Chitosan by Surfactant Addition

Enhanced Enzymatic Hydrolysis of Chitosan by Surfactant Addition

Comparative Study of the Preparation of Reducing Sugars Hydrolyzed from High-Lignin Lignocellulose Pretreated with Ionic Liquid, Alkaline Solution and Their Combination

Preparation of Reducing Sugar Hydrolyzed from High-Lignin Coconut Coir Dust Pretreated by the Recycled Ionic Liquid [mmim][dmp] and Combination with Alkaline

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