Integral valorization of two legumes by autohydrolysis and organosolv delignification

Alfaro, A.; Rivera, A.; Pérez, A.; Yáñez, Remedios; García, Juan Carlos Figueroa; López, Fátima

doi:10.1016/j.biortech.2008.05.003

Cited by 50 publications

(38 citation statements)

References 26 publications

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“…During the prehydrolysis stage of DP production, hemicelluloses and other organics are dissolved in the prehydrolysate (PHL). The major reactions include depolymerization and dissolution of hemicelluloses 9,10) , further degradation of pentose to products such as furfural and hydroxymethylfurfural 11) , and acetic acid generation by the cleavage of acetyl groups, which is responsible for the decrease in pH during prehydrolysis 9,12) .…”

Section: Introductionmentioning

confidence: 99%

Peer Reviewed Biorefinery of Oil Palm Empty Fruit Bunch by Nitric Acid Prehydrolysis Soda Cooking. Production of Furfural and Dissolving Pulp

2018

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Abundant waste agricultural residues such as oil palm empty fruit bunch (EFB) can provide alternative sources of biomass for producing furfural. The aims of this study were to propose a method of preparing furfural and dissolving pulp (DP) from EFB using prehydrolysis with nitric acid, and to examine how the prehydrolysate, which contains xylan, can be used for furfural production. The furfural yield in the nitric acid prehydrolysate was increased to 6.2% of the EFB material weight by dehydration with an acid catalyst. Nitric acid prehydrolysis followed by soda cooking under atmospheric pressure was also applied to the preparation of DP. The obtained pulp was then bleached by using peroxymonosulfuric acid (Psa), chlorine dioxide (D0, D1), and hydrogen peroxide (Ep) in the elementary chlorine-free Psa-D0-Ep-D1 sequence. The pulp demonstrated a brightness of 90.4% ISO and a viscosity of 6.5 cP, which met the National Standard of Indonesia, although the xylan content was a little high and the α-cellulose content was 83.0%.

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Section: Introductionmentioning

confidence: 99%

Peer Reviewed Biorefinery of Oil Palm Empty Fruit Bunch by Nitric Acid Prehydrolysis Soda Cooking. Production of Furfural and Dissolving Pulp

2018

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“…Temperature and operation time have the highest influence. The range of variation of independent variables was determined according to previous experiments (data not show) and other studies (Alfaro et al, 2009, López et al, 2010.…”

Section: Experimental Design For Pulping Processmentioning

confidence: 99%

Optimization the soda-AQ process for cellulose pulp production and energy content of black liquor from L. leucocephala K360

Feria

García

Díaz

et al. 2012

Bioresource Technology

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A commercial variety of Leucaena leucocephala K 360 was used for pulp production and papermaking employing the soda-anthraquinone process. Also, the chemical and energy contents of the resultant black liquors were determined to simultaneously optimize: pulp and paper production and energy generation. A process temperature of (185 °C), an operating time of (120 min) and an active alkali concentration of (21%) provided sheets of paper with good strength (tensile index of 12.12N m/g, burst index of 0.38 kPa m2/g, tear index of 1.29 mN m2/g and a Kappa number of 20.5) and black liquor with a greater calorific value (14.1 MJ/kg) than that obtained with higher active alkali concentrations. However, reducing the active alkali concentration to a level in the low operation range led to less marked degradation of cellulose and allowed paper sheets with good properties to be obtained and energy to be optimally produced from the black liquor. List the changeWe agree with changes made by the editor. These changes have been highlight in yellow and new changes have been highlight in green.The changes have been made about the file Word BITE-D-11-05292R2: Page 7, line 1: "The chemical characterization is comparable to other Leucaena varieties and hardwoods. Optimum results on the properties of viscosity and resistance of the sheets of paper Black liquor with greater calorific value than to high active alkali concentrations" was changed by "The chemical composition of Leucaena leucocephala is comparable to that of other Leucaena varieties and hardwoods. Optimum conditions for the production of sheet papers with optimal viscosity and resistance were determined. Black liquor with greater calorific value was obtained at low active alkali concentration." Page 8, line 1: "Optimization of L. leucocephala K360 use by soda-AQ process for cellulose pulp production and energy use of black liquor" was changed by "Optimization the soda-AQ process for cellulose pulp production and energy content of black liquor from L. leucocephala K360". Page 9, line 5: Abtract changed until 150 words. "A commercial improved variety of Leucaena leucocephala inoculated with rhizobium was used for pulp production and papermaking by use a sodaanthraquinone process. Also, black liquors were characterized in chemical and energetic terms to simultaneously optimize both process: pulp and paper and energetic use. The process to high process temperatures (185 °C), operating time intermediate (120 min) and low active alkali concentration (21%) provides sheets of paper with good strength properties of paper and black liquor with greater calorific value (14.1 MJ/kg) than to high active alkali concentrations. Optimum results on the properties of viscosity and resistance of the sheets of paper (tensile index of 12.12N m/g, burst index of 0.38 kPa m2/g, tear index of 1.29 mN m2/g and Kappa number of 20.5) were obtained operating at high temperatures, high active alkali concentration and intermediate operating time. However, these conditions were low losses in cel...

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“…These sugars consist of monosaccharides (xylose, glucose, arabinose) and xylo-oligosacharides (Alfaro et al, 2009;Yañez et al, 2009), which can be further hydrolyzed and fermented to obtain several products like xylitol (Ferrer et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Xylose recovery from dilute-acid hydrolysis of oil palm (Elaeis guineensis) empty fruit bunches for xylitol production

Manjarrés-Pinzón¹,

Arias-Zabala²,

Londoño³

et al. 2017

Afr. J. Biotechnol.

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The aim of this study was to evaluate the effect of different process conditions, such as the sulfuric acid concentration, contact time, solid:liquid ratio and particle size, on the xylose recovery and the formation of by-products from oil palm empty fruit bunch (OPEFB) with dilute-acid hydrolysis. Moreover, an adapted and non-adapted strain of the yeast Candida guilliermondii was used to obtain xylitol from the optimal hydrolysate. Xylose, glucose, hydroxymethylfurfural (HMF) and acetic acid in the acid hydrolysate were analyzed with high performance liquid chromatography (HPLC). A BoxBehnken-based design was used to find the combination of factors that maximized the formation of xylose in the hydrolysate optimization process. The fermentation to obtain xylitol from the optimized hydrolysate of OPEFB with adapted and non-adapted C. guilliermondii strains was made in 100 ml Erlenmeyer flasks at 30°C for 96 h at 200 rpm in an incubator shaker. The maximum xylose concentration (32.59 g L -1) was obtained at 121°C, for 30 min, with a 1:8 solid:liquid ratio, 2% acid concentration and particle size of around 4 cm. With the same conditions, the inhibitor concentrations, such as HMF, glucose and acetic acid, were 0.023, 1.033 and 11.078 g L -1, respectively. The optimized conditions were the same as previously described. The higher xylitol productivity (10.3 g L -1) and yield (0.43 g g -1) were obtained by fermentation with non-adapted C. guilliermondii strains from the optimized hydrolysate of OPEFB without the need for detoxification. It is not necessary to make an adaptation of C. guilliermondii in the optimized hydrolysate of OPEFB to produce xylitol.

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Integral valorization of two legumes by autohydrolysis and organosolv delignification

Cited by 50 publications

References 26 publications

Peer Reviewed Biorefinery of Oil Palm Empty Fruit Bunch by Nitric Acid Prehydrolysis Soda Cooking. Production of Furfural and Dissolving Pulp

Peer Reviewed Biorefinery of Oil Palm Empty Fruit Bunch by Nitric Acid Prehydrolysis Soda Cooking. Production of Furfural and Dissolving Pulp

Optimization the soda-AQ process for cellulose pulp production and energy content of black liquor from L. leucocephala K360

Xylose recovery from dilute-acid hydrolysis of oil palm (Elaeis guineensis) empty fruit bunches for xylitol production

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