Alkali-peroxide extraction of xylan from sugar cane bagasse. Characteristics and film forming capacity

Solier, Yamil Nahún; Schnell, Carla N.; Cabrera, María Noel; Zanuttini, Miguel Angel Mario; Inalbon, María Cristina

doi:10.1016/j.indcrop.2019.112056

Cited by 10 publications

(7 citation statements)

References 39 publications

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“…It was previously found that hemicelluloses extracted and precipitated under these conditions show a narrow range of molecular weight (polydispersity ranged from 1.03 to 1.30) [11] which was ascribed to the relatively low ratio of liquor:ethanol used (lower than the 1:4 v/v ratio adopted by other authors [10,30]).…”

Section: Hemicellulose Extraction and Precipitation Yieldsmentioning

confidence: 90%

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Alkali-peroxide treatment of sugar cane bagasse. Effect of chemical charges on the efficiency of xylan isolation and susceptibility of bagasse to saccharification

Solier

Mocchiutti

Cabrera

et al. 2020

Biomass Conv. Bioref.

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Sugar cane is a promising raw material for the extraction of hemicelluloses. An alkali treatment of sugar cane bagasse under proper conditions followed by a precipitation using a reasonable quantity of ethanol can be an effective method to isolate these polysaccharides. In this work, bagasse is treated to obtain two products: (a) polymeric hemicellulose and (b) an enzymatic hydrolysate from the treated bagasse after hemicellulose extraction. The effects of charges of sodium hydroxide (10, 20, 40% w/w) and hydrogen peroxide (0, 10, 20% w/w) in the alkali treatment were evaluated. A 3 2 experimental design was considered under control of metal ions and inert atmosphere during alkaline treatment. An acceptable proportion of xylose plus arabinose could be extracted from bagasse (up to 18.4 g/100 g of bagasse). Both the alkali and peroxide showed strong effects on the yield of the extraction, as well as on the yield of the precipitation in ethanol-water solution. Besides, the susceptibility of bagasse for cellulolytic enzymatic hydrolysis is improved. The highest hemicellulose precipitation yield was 85% which corresponded to the treatment with the highest alkali charge without peroxide. The highest yield of enzymatic hydrolysis was obtained for the highest alkali and peroxide charges.

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Section: Hemicellulose Extraction and Precipitation Yieldsmentioning

confidence: 90%

“…Particularly, in Argentina, 18.4 million tons of sugar cane were processed annually [7]. The major hemicelluloses in sugar cane bagasse, as in other grasses, are L-arabino-(4-O-methyl-D-glucurono)-D-xylans (or just xylan) [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Alkali-peroxide treatment of sugar cane bagasse. Effect of chemical charges on the efficiency of xylan isolation and susceptibility of bagasse to saccharification

Solier

Mocchiutti

Cabrera

et al. 2020

Biomass Conv. Bioref.

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“…For its use, xylan was directly taken from the plastic tube. In a previous work, [ 25 ] it was shown that this raw material and the isolation conditions here applied lead to a xylan‐rich hetero polysaccharide material of the following composition (expressed as % on dry precipitate): xylose 67, arabinose 18, glucuronic acid 2, acid insoluble lignin 7, soluble lignin 6.…”

Section: Methodsmentioning

confidence: 99%

“…In previous studies [ 9,10,25 ] it was demonstrated that pH 5.0 was optimal in the case of xylan/chitosan film formation due to the high degree of interaction of these two polyelectrolytes. Considering those results and that there is no difference in the mass ratio at the neutrality at pHs 5.0 and 7.0 (discussed in the Section 3), these two pH values were selected for polyelectrolyte complex preparation and film formation.…”

Section: Methodsmentioning

confidence: 99%

Thermoplastic Films Based on Polyelectrolyte Complexes of Arabino Glucurono‐Xylan and Polyethylenimine

Solier

Mocchiutti

Inalbon

et al. 2022

Macro Materials & Eng

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This work investigates film formation using polyelectrolyte complexes (PECs) of xylan and polyethylenimine (PEI). Different xylan/PEI mass ratios (from 50/50 to 90/10) and pH values (5.0 and 7.0) are analyzed and both parameters have an effect on complex size and film properties. Furthermore, the mass ratio corresponding to the neutralization charge depends on pH. When xylan/PEI mass ratios are near the neutralization charge ratio, a coacervation process is observed. In this case, separation between the coacervate and the supernatant dilute phase is possible. In the supernatant, both concentrations, xylan and PEI, depend on pH. The complex suspensions are used to obtain films by PECs casting/evaporation process. For films obtained from the whole suspension, by increasing the xylan content the stress at break is improved (up to 23 MPa for 85/15, at pH 7.0) and the strain at break is decreased (to 2.5%). When only coacervate is used to prepare films, the tensile strength is higher, reaching a value of 37 MPa for 85/15 mass ratio. Dynamic mechanical thermal analysis shows that the glass transition temperature (Tg) of the films is affected by composition. The thermoplastic behavior of a 50/50 xylan/PEI film is confirmed using a hot‐compression molding.

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“…The latter tend to have longer reaction times, a high soda and peroxide charge, and low temperatures. The extracted xylosaccharides can be recovered by precipitation with ethanol and used for biofilm production [35,36].…”

Section: Alkaline Pretreatmentmentioning

confidence: 99%

Alternatives for the Management of Industrial Forest Waste: Energy, Bioethanol, and Cellulose Pulp

Clavijo¹,

Guigou²,

Cassella³

et al. 2023

Recycling Strategy and Challenges Associated With Waste Management Towards Sustaining the World

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Modern kraft pulp mills generate solid waste of 1–2% of incoming debarked wood. Given the size of these plants, with an annual production capacity of at least 1000,000 tons, each plant generates 20,000–30,000 dry tons of waste per year. The largest current use of these residues is for combustion in biomass boilers for steam and power generation. However, the conversion of biomass into biofuels and chemicals is gaining interest due to increasing demands for energy, limited sources of fossil fuels, and growing concerns about the environmental impact of greenhouse gas emissions. This chapter shows the laboratory-scale results of the use of eucalyptus wood wastes to obtain cellulose pulp by alkali pulping reinforced with hydrogen peroxide to obtain alkaline peroxide mechanical pulp or cellulosic bioethanol. Based on the results, an industrial-scale techno-economic analysis of the processes is presented and compared with current alternatives for energy generation.

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Alkali-peroxide extraction of xylan from sugar cane bagasse. Characteristics and film forming capacity

Cited by 10 publications

References 39 publications

Alkali-peroxide treatment of sugar cane bagasse. Effect of chemical charges on the efficiency of xylan isolation and susceptibility of bagasse to saccharification

Alkali-peroxide treatment of sugar cane bagasse. Effect of chemical charges on the efficiency of xylan isolation and susceptibility of bagasse to saccharification

Thermoplastic Films Based on Polyelectrolyte Complexes of Arabino Glucurono‐Xylan and Polyethylenimine

Alternatives for the Management of Industrial Forest Waste: Energy, Bioethanol, and Cellulose Pulp

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