Arundo donax L. Valorization under Hydrothermal and Pulp Processing

Caparrós, S.; Ariza, J.; Hernánz, Dolores; Díaz, María José Moreno

doi:10.1021/ie0580811

Cited by 11 publications

(5 citation statements)

References 43 publications

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“…Raw Material Characteristics. The chemical characterization of Paulownia raw material and other woods are shown in Table ; ,− therefore, Eucalyptus globulus was used as a reference. In this table, the comparison with Paulownia properties that were reported by Jiménez et al shows certain variations in properties.…”

Section: Resultsmentioning

confidence: 99%

Optimization of Paulownia Fortunei L. Autohydrolysis−Organosolv Pulping as a Source of Xylooligomers and Cellulose Pulp

Caparrós

Ariza

Garrote

et al. 2006

Ind. Eng. Chem. Res.

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This paper will consider the influence of the autohydrolysis pretreatment on Paulownia fortunei L. woods to obtain a liquid phase (which can be used as a commercial source of organic reagents) and also a solid phase (which is valuable as raw material for pulping processes). Moreover, the influence of the operating conditionss viz., ethanol concentration (20%-60%), temperature (150-180 °C), and pulping time (30-90 min)son the organosolv pulping (the initial liquor-to-solid ratio was 8:1, with 10% of soda and 0.5% of anthraquinone) of the obtained Paulownia fortunei L. solid after the autohydrolysis process has been considered to determine the best pulping conditions and characteristics of the solid phase. In that form, the yield, kappa number, glucan and lignin contents, and tensile index values of the resulting pulps and paper sheets have been studied. The optimum of solubilized components has been obtained at 190 °C (0.92 g/L glucose, 1.61 g/L xylose, 0.60 g/L arabinose, 0.93 g/L acetic acid, 0.047 g/L 5-hydroxymethylfurfural, 0.141 g/L furfural, and 14.66 g/L oligomers). Under these conditions, a suitable chemical composition of pulps and acceptable yield (38%), kappa number (45), and tensile index (28.87 N m/g) could be obtained through operation at high temperature (180 °C), short pulping time (30 min), and low ethanol concentration (20%).

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Section: Resultsmentioning

confidence: 99%

Optimization of Paulownia Fortunei L. Autohydrolysis−Organosolv Pulping as a Source of Xylooligomers and Cellulose Pulp

Caparrós

Ariza

Garrote

et al. 2006

Ind. Eng. Chem. Res.

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“…An interesting raw material for its hydrothermal processing is Arundo donax L. (common name “giant reed”), which is a perennial grass that grows quickly, adapts easily to different habitats, and exhibits very high levels of productivity (on the order of 10−75 t hectare -1 ). , …”

Section: Introductionmentioning

confidence: 99%

Autohydrolysis of Arundo donax L., a Kinetic Assessment

Caparrós

Garrote

Ariza

et al. 2006

Ind. Eng. Chem. Res.

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Arundo donax L. was submitted to a process of isothermal autohydrolysis in the temperature range of 150-195°C, for periods between 0 and 15 h and a liquid/solid ratio ) 8 g g -1 , for the purpose of hydrolyzing the hemicelluloses to oligomers (compounds which are of interest to the food industry) and monomers. A conventional kinetic model was developed that explains the evolution over time of the hemicelluloses and hemicellulose degradation products. Kinetic modeling was also carried out using the severity factor approach and the kinetic parameters obtained in these two ways have been compared.

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“…The extractives content was around 2.7% for EG and 5.2% for WS. This indicates that the increase in the lignin Wheat straw [27][28][29] Tagasaste [30] Miscanthus [31] Arundo donax [32] 1% NaOH soluble (%) 13 and extractives content of the solid contributes in making the material less accessible to the reaction, yielding less lignin-derived products in the liquid [17]. This aspect is important because these products derived from lignin constitute impurities in the liquid fraction.…”

Section: Effect Of Hydrothermal Treatment On Wheat Straw Solubilizationmentioning

confidence: 99%

Maximizing furfural concentration from wheat straw and Eucalyptus globulus by nonisothermal autohydrolysis

García-Domínguez

López

et al. 2015

Env Prog and Sustain Energy

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The autohydrolysis process as a method for selective extraction of hemicelluloses and conversion to furfural was proposed for lignocellulosic raw materials. Samples of wheat straw (WS) and Eucalyptus globulus (EG) were subjected to nonisothermal autohydrolysis, defined by temperature 180–240°C. Within a biorefinery scheme for the selected materials, the aim of this study is both (a) to optimize furfural processing technology to enable higher yields and improved productivity from EG and WS by autohydrolysis and (b) to not excessively degrade the remaining polymeric constituents (glucan) in solid to facilitate a potential later use. Differences in the rate of the dehydration reaction of xylose to furfural have been observed, and it is faster in the case of WS with respect to that observed for eucalyptus. In that form, 4.25 g/100 g raw material (26% of the initial xylan in WS) could be found at 220°C, and an increase in the temperature (240°C) yielded 4.54 g/100 g raw material, 28% of the initial xylan. In EG, the increase in the hydrolysis temperature (240°C) yielded liquor with higher contents of furfural (4.45 g/100 g raw material, 25% of the initial xylan) and acetic acid (4.49 g/100 g raw material) and smaller contents of arabinose and xylan. In WS, a faster dehydration is found. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1236–1242, 2015

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Arundo donax L. Valorization under Hydrothermal and Pulp Processing

Cited by 11 publications

References 43 publications

Optimization of Paulownia Fortunei L. Autohydrolysis−Organosolv Pulping as a Source of Xylooligomers and Cellulose Pulp

Optimization of Paulownia Fortunei L. Autohydrolysis−Organosolv Pulping as a Source of Xylooligomers and Cellulose Pulp

Autohydrolysis of Arundo donax L., a Kinetic Assessment

Maximizing furfural concentration from wheat straw and Eucalyptus globulus by nonisothermal autohydrolysis

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