Influence of dual salt on the pretreatment of sugarcane bagasse with hydrogen peroxide for bioethanol production

Ramadoss, Govindarajan; Muthukumar, Karuppan

doi:10.1016/j.cej.2014.08.006

Cited by 91 publications

(25 citation statements)

References 38 publications

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“…SCB constituents such as cellulose, hemicellulose, lignin and ash were determined by detergent extraction method as described in our previous study [13,14]. The reducing sugars content was determined by 3,5-dinitrosalicyclic acid (DNS) method [15].…”

Section: Methodsmentioning

confidence: 99%

Mechanistic study on ultrasound assisted pretreatment of sugarcane bagasse using metal salt with hydrogen peroxide for bioethanol production

Ramadoss

Muthukumar

2016

Ultrasonics Sonochemistry

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This study presents the ultrasound assisted pretreatment of sugarcane bagasse (SCB) using metal salt with hydrogen peroxide for bioethanol production. Among the different metal salts used, maximum holocellulose recovery and delignification were achieved with ultrasound assisted titanium dioxide (TiO2) pretreatment (UATP) system. At optimum conditions (1% H2O2, 4 g SCB dosage, 60 min sonication time, 2:100 M ratio of metal salt and H2O2, 75°C, 50% ultrasound amplitude and 70% ultrasound duty cycle), 94.98 ± 1.11% holocellulose recovery and 78.72 ± 0.86% delignification were observed. The pretreated SCB was subjected to dilute acid hydrolysis using 0.25% H2SO4 and maximum xylose, glucose and arabinose concentration obtained were 10.94 ± 0.35 g/L, 14.86 ± 0.12 g/L and 2.52 ± 0.27 g/L, respectively. The inhibitors production was found to be very less (0.93 ± 0.11 g/L furfural and 0.76 ± 0.62 g/L acetic acid) and the maximum theoretical yield of glucose and hemicellulose conversion attained were 85.8% and 77%, respectively. The fermentation was carried out using Saccharomyces cerevisiae and at the end of 72 h, 0.468 g bioethanol/g holocellulose was achieved. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis of pretreated SCB was made and its morphology was studied using scanning electron microscopy (SEM). The compounds formed during the pretreatment were identified using gas chromatography-mass spectrometry (GC-MS) analysis.

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Section: Methodsmentioning

confidence: 99%

Mechanistic study on ultrasound assisted pretreatment of sugarcane bagasse using metal salt with hydrogen peroxide for bioethanol production

Ramadoss

Muthukumar

2016

Ultrasonics Sonochemistry

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“…1b) [23]. However, excessive usage of peroxide concentration could also lead to the low recovery of cellulose [24]. It might be the reason why the yield of glucose yield after enzymatic hydrolysis was decreased at higher concentration of hydrogen peroxide (10% H2O2 concentration).…”

Section: Influences Of H2o2 Concentration On Sugar Releases In Liquidmentioning

confidence: 99%

Effect of Combination of Liquid Hot Water System and Hydrogen Peroxide Pretreatment on Enzymatic Saccharification of Corn Cob

Upajak¹

2018

GEOMATE

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Alkaline hydrogen peroxide pretreatment is an effectively enhance the increasing enzymatic digestibility of lignocellulosic biomass for conversion to fuels and chemicals in the biorefinery processes. In this study, effects of H 2 O 2 on monomeric sugar in the liquid fraction during hydrogen peroxide pretreatment and sugar after enzymatic hydrolysis from corncobs were studied under varying reaction conditions. The temperature (30-120 o C) and H 2 O 2 concentration (2.5-10%) efficiently promoted sugar yield in the piqued fraction and improved enzymatic hydrolysis of pretreated solids. The optimal condition for H 2 O 2 pretreatment of corncob (H 2 O 2 concentration of 5% using 60 o C for 2 h) increased hemicellulose solubilization into the aqueous phase, resulting into the maximized pentose yield of 61.88% (xylose + arabinose) in the aqueous phase. H 2 O 2 pretreatment under the optimal conditions at 60 o C for 2 h, leading to the enhance glucose yield from enzymatic hydrolysis of the pretreated biomass using 10 FPU/g CelluclastTM (85.66 %) and small amount of formation of inhibitory by-products. Combined with glucose in the aqueous phase, this resulted in the maxima 95.61% glucose recovery from the native corncob. This was related to changes in crystallinity and surface area of the pretreated biomass. Scanning electron microscopy (SEM) showed disruption of the intact biomass structure resulting increasing enzyme's accessibility to the cellulose microfibers which showed higher crystallinity index compared to the native biomass as shown by X-ray diffraction with a marked increase in surface area as revealed by BET measurement. The results provided efficiency of H2O2 pretreatment on increasing sugar recovery and an efficient approach for its processing in biorefinery industry.

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“…Due to the phenolic groups present in the lignin, the infrared spectrum shows absorption bands at 1600 and 1510 cm -1 , related to axial deformations of the aromatic rings [32] . Besides the characteristic absorption bands of cellulose and lignin, the untreated SCB and CCS present absorption bands at 1730 cm -1 , characteristic of the axial stretching of the carbonyl and associated with hemicellulose [10,14] . The infrared spectra of the untreated SCB and CCS indicate the presence of cellulose, lignin and hemicellulose, in agreement with the results of the quantitative analysis shown in Table 1.…”

Section: Transmission Electron Microscopy (Tem)mentioning

confidence: 99%

“…Rosa et al [12] has isolated cellulose from rice husk by cellulose extraction in two-step chlorine-free bleaching processes. Other processes are performed without the alkali treatment step, using systems such as nitric/acetic acid [11] and peracetic acid [13] and mixtures of hydrogen peroxide with manganese(II) sulfate and zinc oxide or manganese(II) sulfate and titanium dioxide [14] . In the bleaching process the control variables, such as temperature, time and concentration of reagents, play an extremely important role.…”

Section: Introductionmentioning

confidence: 99%

Isolation of whiskers from natural sources and their dispersed in a non-aqueous medium

et al. 2016

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SbstractWhiskers have been used as a nanomaterial dispersed in polymer matrices to modify the microscopic and macroscopic properties of the polymer. These nanomaterials can be isolated from cellulose, one of the most abundant natural renewable sources of biodegradable polymer. In this study, whiskers were isolated from sugarcane bagasse and corn cob straw fibers. Initially, the cellulose fiber was treated through an alkaline/oxidative process followed by acid hydrolysis. Dimethylformamide and dimethyl sulfoxide were used to replace the aqueous medium for the dispersion of the whiskers. For the solvent exchange, dimethylformamide or dimethyl sulfoxide was added to the aqueous dispersion and the water was then removed by fractional distillation. FTIR, TGA, XRD, TEM, Zeta and DLS techniques were used to evaluate the efficiency of the isolation process as well as the morphology and dimensions of the whiskers. The dimensions of the whiskers are comparable with values reported in the literature, maintaining the uniformity and homogeneity in both aqueous and non-aqueous solvents.

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Influence of dual salt on the pretreatment of sugarcane bagasse with hydrogen peroxide for bioethanol production

Cited by 91 publications

References 38 publications

Mechanistic study on ultrasound assisted pretreatment of sugarcane bagasse using metal salt with hydrogen peroxide for bioethanol production

Mechanistic study on ultrasound assisted pretreatment of sugarcane bagasse using metal salt with hydrogen peroxide for bioethanol production

Effect of Combination of Liquid Hot Water System and Hydrogen Peroxide Pretreatment on Enzymatic Saccharification of Corn Cob

Isolation of whiskers from natural sources and their dispersed in a non-aqueous medium

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