Influence of ethanol pulping of wheat straw on the resulting paper sheets

Jiménez, L.; Pérez, I.; García, Juan Carlos Figueroa; Rodríguez, Alejandro; Ferrer, J.L.

doi:10.1016/s0032-9592(01)00255-2

Cited by 27 publications

(15 citation statements)

References 12 publications

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“…Mild operating conditions give rise to strength properties of the pulps that are too low, while severe operation conditions give rise to low pulp yield and excessive consumption of energy (operating at high temperature and number of PFI beating revolutions) and reagents (operating with high concentration), as well as a high capital assets for installation (operating for a high pulping time). The polynomial models obtained for the different dependent variables were similar to those previously reported for paper sheets from some types of agricultural and agro-industries residues: acetone, ethanol, and ethanol-acetone pulp from wheat straw (Jiménez et al 2001(Jiménez et al , 2002(Jiménez et al and 2004; kraft pulp from olive wood pruning (López et al 2000, Díaz et al 2005; and soda-anthraquinone pulp from empty fruit bunches of oil palm (Jiménez et al 2009). Table 9 shows the optimal results obtained in this work for orange tree wood pulps, as well as those of other studies for pulps beaten from wheat straw, olive wood, and empty fruit bunches (EFB) of oil palm.…”

Section: Resultssupporting

confidence: 81%

Refining of Soda-AQ, Kraft-AQ, and Ethanol Pulps from Orange Tree Wood

et al. 2013

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The pulp yield of orange tree wood was tested under various conditions including processing with soda-anthraquinone (soda-AQ), kraftanthraquinone (kraft-AQ), or ethanol under different temperature, time, reagent concentration, and PFI laboratory beater beating regimes. Beating grade and stretch properties were studied, with a view to identifying the optimum operating conditions. Polynomial equations were derived that generally reproduced the dependent variables, with errors in most cases much less than 20%. Kraft-AQ pulping was the most efficient. The values of the tensile, burst, and tear indices obtained with kraft-AQ (78.04 Nm/g, 4.84 kN/g, and 2.97 mNm 2 /g, respectively), were in most cases higher than those found for soda-AQ and ethanol pulps. Using lower values of operational conditions than those required to maximize the studied paper properties (170 °C, 65 min, 13% active alkali, and 2700 number of PFI beating revolutions), it was possible to provide a more energy-and chemically-efficient process for industrial facilities.

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Section: Resultssupporting

confidence: 81%

Refining of Soda-AQ, Kraft-AQ, and Ethanol Pulps from Orange Tree Wood

et al. 2013

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“…Historically, the organosolv process has been investigated largely from the perspective of paper production (Diaz et al, 2004;Gilarranz et al, 1998;Jimenez et al, 2004;van Heiningen, 1996, 1997), but several studies have also involved analysis of the lignin fraction extracted during pulping (Hepditch and Thring, 1997;Liu et al, 2000;Lora et al, 1993), including demonstration of its potential for manufacture of various industrial co-products such as adhesives or biodegradable polymers (Boocock and Balatinecz, 1992;Kubo and Kadla, 2004;Thring et al, 1997). Generation of high-quality lignin and other potentially valuable co-products (e.g., furfural and acetic acid) from woody feedstocks may be critical to otherwise marginally cost-effective biorefinery schemes for fuel ethanol production (Pan et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Bioconversion of hybrid poplar to ethanol and co-products using an organosolv fractionation process: Optimization of process yields

Pan

Gilkes

Kadla

et al. 2006

Biotechnol. Bioeng.

413

270

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An organosolv process involving extraction with hot aqueous ethanol has been evaluated for bioconversion of hybrid poplar to ethanol. The process resulted in fractionation of poplar chips into a cellulose-rich solids fraction, an ethanol organosolv lignin (EOL) fraction, and a water-soluble fraction containing hemicellulosic sugars, sugar breakdown products, degraded lignin, and other components. The influence of four independent process variables (temperature, time, catalyst dose, and ethanol concentration) on product yields was analyzed over a broad range using a small composite design and response surface methodology. Center point conditions for the composite design (180 degrees C, 60 min, 1.25% H(2)SO(4), and 60% ethanol), yielded a solids fraction containing approximately 88% of the cellulose present in the untreated poplar. Approximately 82% of the total cellulose in the untreated poplar was recovered as monomeric glucose after hydrolysis of the solids fraction for 24 h using a low enzyme loading (20 filter paper units of cellulase/g cellulose); approximately 85% was recovered after 48 h hydrolysis. Total recovery of xylose (soluble and insoluble) was equivalent to approximately 72% of the xylose present in untreated wood. Approximately 74% of the lignin in untreated wood was recovered as EOL. Other cooking conditions resulted in either similar or inferior product yields although the distribution of components between the various fractions differed markedly. Data analysis generated regression models that describe process responses for any combination of the four variables.

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“…Among organic solvents used, alcohols (ethanol, methanol, butanol, etc.) and organic acids (acetic and formic acids) are commonly employed for non-woody materials [1,2,18,24,34,[54][55][56][57][58][59][60][61][62][63][64][65][66]. Nevertheless, acetone and other solvents such as phenol, formaldehyde, ethanolamine, ethylene glycol and ethanol-water have also been used for these alternative raw materials [1,2,19,23,34,38,60,[67][68][69][70][71], demonstrating that these materials can be used for the manufacture of pulp and paper through different processes with acceptable characteristics.…”

Section: Organosolv Pulpingmentioning

confidence: 99%

“…These are the most widely used processes due to the selectivity that these solvents contribute to the separation of the lignin and their easy recovery by distillation. In the case of the ethanol process, the influence of the operating variables (ethanol concentration, temperature, time and liquid/solid ratio) on the characteristics of the pulp and paper sheets obtained from different alternative raw materials, including olive tree [62], wheat straw [1,2,18], tagasaste [24,57], sunflower stalk and P. fortunei [54,55] and vine shoots [34], has been studied. As an example, in the case of wheat straw, when pulping is carried out at 200°C, with an ethanol concentration of 75% for 60 min, acceptable good values are obtained for yield (37.6%), holocellulose (88.8%), α-cellulose (46.9%) and lignin (7.2%) [1,2,18].…”

Section: Pulping Using Alcoholsmentioning

confidence: 99%

Alternative Raw Materials for Pulp and Paper Production in the Concept of a Lignocellulosic Biorefinery

Eugenio¹,

Ibarra²,

Martín‐Sampedro³

et al. 2019

Cellulose

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The main source of cellulosic fibre used for pulp and paper production comes from wood, while non-wood fibres are used to a lesser extent. However, a renewed interest exists in the use of non-woody raw materials due to their abundance as source of low-cost fibres and because they are sometimes the only exploitable source of fibres in certain geographical areas, mainly in developing countries. Moreover, the great variety of characteristics, fibre dimensions and chemical composition of these alternative raw materials give them a great potential to produce different types of papers. On the other hand, the pulp and paper industry is an excellent starting point for the development of lignocellulosic biorefineries, possessing the necessary technology and infrastructure as well as extensive experience in lignocellulosic biomass transformation. Since its beginnings, the pulp and paper industry has been practicing certain aspects of the biorefinery concept, generating the energy necessary for the production of cellulosic pulp from the combustion of lignocellulosic waste and black liquors, recovering the chemical reagents used and generating high value-added products (e.g. tall oil) together with cellulosic pulp. However, the evolution of the pulp and paper industry to a lignocellulosic biorefinery requires technological innovations to make bioenergy and new bioproducts available alongside traditional products.

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Influence of ethanol pulping of wheat straw on the resulting paper sheets

Cited by 27 publications

References 12 publications

Refining of Soda-AQ, Kraft-AQ, and Ethanol Pulps from Orange Tree Wood

Refining of Soda-AQ, Kraft-AQ, and Ethanol Pulps from Orange Tree Wood

Bioconversion of hybrid poplar to ethanol and co-products using an organosolv fractionation process: Optimization of process yields

Alternative Raw Materials for Pulp and Paper Production in the Concept of a Lignocellulosic Biorefinery

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