Integral valorization of Leucaena diversifolia by hydrothermal and pulp processing

Feria, M.J.; Alfaro, A.; López, Fátima; Pérez, A.; García, Juan Carlos Figueroa; Rivera, A.

doi:10.1016/j.biortech.2011.09.100

Cited by 11 publications

(11 citation statements)

References 24 publications

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“…14 The values for tensile, burst and tear indexes, and for brightness were similar to those obtained by López et al (2010a) Leucaena diversifolia (Feria et al, 2012).…”

Section: Pulp and Paper Production And Characterizationsupporting

confidence: 79%

“…Leucaena species have a high production of biomass and re-sprout capacity of more than 50 tons/ha/year, (Sánchez et al, 2003, Feria et al, 2012. Pulping and papermaking from varieties of L. diversifolia and L. leucocephala by the soda-anthraquinone-ethanol process have already be explored (Díaz et al, 2007, López et al, 2008,López et al, 2010a, Feria et al, 2012.…”

Section: Introductionmentioning

confidence: 99%

“…Pulping and papermaking from varieties of L. diversifolia and L. leucocephala by the soda-anthraquinone-ethanol process have already be explored (Díaz et al, 2007, López et al, 2008,López et al, 2010a, Feria et al, 2012.…”

Section: Introductionmentioning

confidence: 99%

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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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“…14 The values for tensile, burst and tear indexes, and for brightness were similar to those obtained by López et al (2010a) Leucaena diversifolia (Feria et al, 2012).…”

Section: Pulp and Paper Production And Characterizationsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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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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“…Eucalyptus urograndis has been industrially exploited by fractionation with hot water and, more recently, by autohydrolysis, which requires no chemicals [12][13][14][15]. In integral fractionation schemes, also known as "biorefinery schemes," the raw material is used to obtain a valorizable liquor and a solid residue that can be pyrolyzed to produce hydrogen in an integrated manner [16].…”

Section: Introductionmentioning

confidence: 99%

Effect of autohydrolysis on hemicellulose extraction and pyrolytic hydrogen production from Eucalyptus urograndis

Loaiza

Palma

Díaz

et al. 2020

Biomass Conv. Bioref.

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Ensuring environmental and social-economic sustainability in the use of materials from lignocellulosic biomass requires their fractionation and valorization of their main components. In this work, we used Eucalyptus urograndis wood to obtain chemicals and energy. The raw material was characterized in chemical terms and then subjected to autohydrolysis under variable operating conditions to optimize the extraction of hemicellulose derivatives relative to cellulose. The kinetics of the pyrolysis process was modeled in terms of activation energy and hydrogen production. Using temperatures in the range of 180-190°C and treatment times in the range of 15-30 min allowed more than 74.5% of all hemicellulosic components in the raw material to be selectively extracted into the liquid post-hydrolysis phase, more than 90% of all glucan to remain in the solid phase and up to 27.8% of lignin to be removed. The thermal behavior of solid fraction was examined by thermogravimetric analysis, using variable heating rates under a nitrogen atmosphere, and the activation energy can be estimated by using the Flynn-Wall-Ozawa method. Based on the results, the pyrolysis of E. urograndis can be modeled as a first-order reaction. The activation energy (E a) at a fractional conversion α between 0.3 and 0.7 was 183 to 199 KJ mol −1 for the raw material, whereas that for the solid residue from autohydrolysis ranged from 179 to 186 kJ mol −1 at same fractional conversion when operational temperature in autohydrolysis was upper 185°C. Based on the results, using temperatures above 180°C and times of 15 min or longer [i.e., operating at the (0,0) experimental point for the autohydrolysis process] in combination with degrees of conversion from 0.3 to 0.8 reduced the activation energy of the pyrolysis process in relation to the raw material by up to 12% and removed hemicellulose by more 74.5% from it. In parallel, the comparative analysis of the E a values and the composition of the pyrolysis gas obtained showed a negative relationship between E a and the amount of hydrogen produced.

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“…The uses of microorganism or purified enzymes in biological way is promising but the process takes place slowly, less drastically, limitation in cultivating temperature and low tolerance to phenolic compound (Chen et al, 2010 ;Pilon et al, 1982). L. Leucocephala was previously delignified by alkaline process with soda and anthraquinone (complex heterogenous reaction process), Kraftt pulping and the most recently acid hydrolysis and pyrolysis process (Feria et al, 2012b ;Feria et al, 2012c ;Loaiza et al, 2017) primarily providing high yield of pulp, low residual lignin , high brightness and good strength properties (Shatalov and Pereira, 2004). Lately, research in the pulp and paper industry has been focused on to ensure sustainable development by using new technologies to improve delignification process.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Formic Acid Concentration on Delignification of Leucaena Leucocephala

Athirah¹,

Hanimah²,

Noormazlinah³

et al. 2017

JCEIB

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Delignification is essential for wide range of technologies especially in paper industry and ethanol as transportation fuel. Researches have been made by thermal, mechanical, chemical and biology treatment. Recently, L. Leucocephala has been in centre of attraction for paper making industry while formic acid, a typical organosolv system has been given attention by the researchers due to effectiveness on the ability to break down and modify the lignin structure. Hence, delignification of L. Leucocephala was studied using chemical treatment with formic acid. The effect of reaction conditions including reaction temperature and formic acid concentration were investigated at atmospheric pressure for 6 hours of reaction time. Delignification percentage approximately 70 – 75 % (v/w) with a pulp yield of 40 – 62% (w/w) was obtained and the optimal reaction temperature is 90oC with 90% of formic acid concentration, respectively. Therefore, temperature and formic acid concentration affected significantly on the delignification process of L. Leucocephala.

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Integral valorization of Leucaena diversifolia by hydrothermal and pulp processing

Cited by 11 publications

References 24 publications

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

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

Effect of autohydrolysis on hemicellulose extraction and pyrolytic hydrogen production from Eucalyptus urograndis

Effect of Temperature and Formic Acid Concentration on Delignification of Leucaena Leucocephala

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