Autohydrolysis Pretreatment of Mixed Softwood to Produce Value Prior to Combustion

Pu, Yan; Treasure, Trevor; Gonzalez, Ronalds; Venditti, Richard A.; Jameel, Hasan

doi:10.1007/s12155-013-9343-2

Cited by 39 publications

(57 citation statements)

References 45 publications

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“…Other products such as wood fiber composites, fuel pellets, dissolving pulp, and nanocellulose could be made from hot water extracted wood chips (Hasan et al 2010;Pu et al 2011;Bach and Skreiberg 2016;Zhu and Yadama 2016). Another use for kraft pulp made from hot water extracted chips may be in wood fiber composite pulps such as Södra's DuraPulp that can be used for making formable products (Hasan et al 2010;Melin 2015).…”

Section: Biorefineries In the Pulp And Paper Industrymentioning

confidence: 99%

Integrating a Biorefinery into an Operating Kraft Mill

Johnson¹,

Hart²

2016

BioResources

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Kraft pulp and paper mills have several advantages for serving the emerging biorefinery industry as a source of raw materials. This review examines technologies for producing liquid biofuels, chemicals, and advanced materials from woody feedstocks to generate new sources of revenue. Market pull comes in part from government policies that drive substitution of petroleum-based products with biobased equivalents. Kraft mills have ample networks to supply feedstocks, whether these are forest residues or byproduct side streams. Pulp mills are well suited to expand sufficiently to accommodate production of value added platform chemicals that are in demand because of brand owner sustainability commitments.

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Section: Biorefineries In the Pulp And Paper Industrymentioning

confidence: 99%

Integrating a Biorefinery into an Operating Kraft Mill

Johnson¹,

Hart²

2016

BioResources

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“…The extensive hydrogen bonding between the individual polysaccharide cell wall components may impede the isolation of hemicellulose components (Hendriks and Zeeman 2009;Reddy and Yang 2005). Others studies have involved hot water extraction of hemicellulose sugars, mainly as low-molecular weight oligomers, as a starting material for ethanol production (Pu et al 2011). However, to most effectively exploit their polymeric properties, the hemicelluloses can be converted directly in polymeric form for novel industrial applications such as biopolymers, hydrogels, and thermoplastic xylan derivatives.…”

Section: Fig 1 Biorefinery Conceptmentioning

confidence: 99%

“…The conditions for the alkaline pretreatments and auto-hydrolysis are shown in Table 1. These conditions were chosen according some references with focus on xylans extraction (Pu et al 2011;Al-Dajani and Tschirner 2007). After the reaction was completed, the liquors were collected.…”

Section: Wood Pretreatmentmentioning

confidence: 99%

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Ethanol Precipitation of Hetero-Polysaccharide Material from Hardwood by Alkaline Extraction Prior to the Kraft Cooking Process

et al. 2013

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aHemicellulose material is an abundant and relatively under-utilized hetero-polysaccharide material present in lignocellulosic materials. In this study, an alkaline treatment was applied to sweetgum and Eucalyptus globulus chips to extract hemicelluloses prior to kraft pulping to subsequently evaluate the final product and process. An alkaline extraction (10 and 50% NaOH by weight on wood) for 60 min at 100 °C followed by precipitation in ethanol recovered 4.3% of the biomass as a predominantly xylan material (sweetgum 50% NaOH) with an average degree of polymerization around 250 and functional groups similar to a commercial xylan (sweetgum 10% NaOH). This process in comparison to autohydrolysis (water extraction at 100 °C) produced a much higher molecular weight and more pure hemicellullose. The results obtained indicate a promising combination between the effective extraction of hemicellulose from wood and a distillation process that recovers the ethanol, which may be an attractive alternative to recover liquor and ethanol after hemicellulose precipitation. Hemicellulose from sweetgum showed more thermal stability with high molecular weight compared to the hemicellulose extracted from Eucalyptus globulus. An attractive alternative looks to be to recover liquor and ethanol after hemicellulose precipitation.

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“…This dissolved organic fraction contains, in addition to carbohydrate-derived degradation products (aliphatic carboxylic acids), the degradation products of other significant wood polymeric component lignin, together with minor amounts of extractives. The low heating value of carbohydrates and their degradation products, compared to that of lignin, encourages the partial removal of these constituents by different pretreatment stages prior to the main pulping stage (Tunc and van Heiningen 2008a,b;Al-Dajani and Tschirner 2010;Pu et al 2011;Vila et al 2011;Chirat et al 2012;Liu et al 2012c;Martin-Sampedro et al 2014). Lignocellulosic material (LCM) feedstocks are transformed into three major output streams (cellulose, hemicelluloses, and lignin) together with their degradation products by chemical, physical, and biological pretreatments (Duff and Murray 1996).…”

Section: Introductionmentioning

confidence: 99%

Chemical Pretreatments of Wood Chips Prior to Alkaline Pulping - A Review of Pretreatment Alternatives, Chemical Aspects of the Resulting Liquors, and Pulping Outcomes

Lehto

Alén

2015

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The chemical industry is being forced to evaluate new strategies for more effective utilization of renewable feedstocks to diminish the use of fossil resources. In this literature review, the integration of both acidic and alkaline pretreatment phases of hardwood and softwood chips with chemical pulping is discussed. Depending on the pretreatment conditions, high-volume sulfur-free fractions with varying chemical compositions can be produced. In case of acidic pretreatments, the major products include carbohydrates (mono-, oligo-, and polysaccharides), whereas under alkaline (i.e., aqueous NaOH) pretreatment conditions, the sulfur-free fractions of aliphatic carboxylic acids, lignin, and extractives are primarily obtained. All these fractions are potentially interesting groups of compounds and can be used in a number of applications. Finally, the effects of pretreatments on pulping are also considered. Although it is believed that there are important advantages to be gained by integrating this type of renewable raw material-based production, in particular, with kraft pulping, sulfur-free pulping methods such as soda-AQ and oxygen/alkali delignification processes are also briefly discussed.

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Autohydrolysis Pretreatment of Mixed Softwood to Produce Value Prior to Combustion

Cited by 39 publications

References 45 publications

Integrating a Biorefinery into an Operating Kraft Mill

Integrating a Biorefinery into an Operating Kraft Mill

Ethanol Precipitation of Hetero-Polysaccharide Material from Hardwood by Alkaline Extraction Prior to the Kraft Cooking Process

Chemical Pretreatments of Wood Chips Prior to Alkaline Pulping - A Review of Pretreatment Alternatives, Chemical Aspects of the Resulting Liquors, and Pulping Outcomes

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