Biomass pretreatment with water and high-pressure oxygen. The wet-oxidation process

McGinnis, Gary D.; Wilson, W. William; Mullen, Cliff E.

doi:10.1021/i300010a036

Cited by 113 publications

(44 citation statements)

References 6 publications

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“…Cellulose and hemicellulose are both polymers built up by long chains of sugar monomers, which after pretreatment and hydrolysis, can be converted into ethanol by microbial fermentation. Different pretreatment methods exist, such as wet oxidation [4,5], that is used in this study, as well as other methods such as steam explosion [6]. The aim of the pretreatment is to open up the lignocellulosic structure to enable enzymatic hydrolysis.…”

Section: Introductionmentioning

confidence: 99%

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Potential bioethanol and biogas production using lignocellulosic biomass from winter rye, oilseed rape and faba bean

Petersson

Thomsen

Hauggaard-Nielsen

et al. 2007

Biomass and Bioenergy

242

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To meet the increasing need for bioenergy several raw materials have to be considered for the production of e.g. bioethanol and biogas. In this study, three lignocellulosic raw materials were studied, i.e. (1) winter rye straw (Secale cereale L), (2) oilseed rape straw (Brassica napus L.) and (3) faba bean straw (Viciafaba L.). Their composition with regard to cellulose, hemicellulose, lignin, extractives and ash was evaluated, as well as their potential as raw materials for ethanol and biogas production. The materials were pretreated by wet oxidation using parameters previously found to be optimal for pretreatment of corn stover (195 1C, 15 min, 2 g l À1 Na 2 CO 3 and 12 bar oxygen). It was shown that pretreatment was necessary for ethanol production from all raw materials and gave increased biogas yield from winter rye straw. Neither biogas productivity nor yield from oilseed rape straw or faba bean straw was significantly affected by pretreatment. Ethanol was produced by the yeast Saccharomyces cerevisiae during simultaneous enzymatic hydrolysis of the solid material after wet oxidation with yields of 66%, 70% and 52% of theoretical for winter rye, oilseed rape and faba bean straw, respectively. Methane was produced with yields of 0.36, 0.42 and 0.44 l g À1 volatile solids for winter rye, oilseed rape and faba bean straw, respectively, without pretreatment of the materials. However, biogas productivity was low and it took over 50 days to reach the final yield. It could be concluded that all three materials are possible raw materials for either biogas or ethanol production; however, improvement of biogas productivity or ethanol yield is necessary before an economical process can be achieved. r

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Section: Introductionmentioning

confidence: 99%

“…In this method the straw is suspended in a water solution and heated under pressure in the presence of oxygen. It was presented in the early 1980s as an alternative to steam explosion [5]. Wet oxidation has been studied on several raw materials such as wheat straw [4] and corn stover [14].…”

Section: Introductionmentioning

confidence: 99%

Potential bioethanol and biogas production using lignocellulosic biomass from winter rye, oilseed rape and faba bean

Petersson

Thomsen

Hauggaard-Nielsen

et al. 2007

Biomass and Bioenergy

242

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show abstract

“…Cellulose have protected and sheathed by lignin and hemicellulose, and also lignin have covalently bonded to carbohydrates [41]. Cellulose, hemicellulose and lignin content of wheat straw have including [33][34][35][36][37][38][39][40][20][21][22][23][24][25], and 15-20 (%w/w), respectively [60]. Due to this structural complexity of the lignocellulosic matrix, ethanol production from wheat straw requires pretreatment, which is very important for its degradation.…”

Section: Wheat Straw Production and Potential Feedstock For 2nd Genermentioning

confidence: 99%

“…At 185°C, nearly three times more hemicellulose was solubilized than at 150°C [67]. Wet oxidation (WO) has proven itself to be an efficient pretreatment method of wood and wheat straw; WO dissolves the hemicellulosic fraction and makes the solid cellulose fraction susceptible for enzymatic hydrolysis and fermentation [25,5,67]. Wet oxidation operates with water and requires the addition of oxygen.…”

Section: Wet-oxidationmentioning

confidence: 99%

Pretreatments to Enhance the Digestibility of Wheat Straw

Zahoor

2014

IJRSE

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Abstract:Wheat straw is a sufficient agricultural by-product with a low market price. The biofuel produced from lignocellulosic material exhibits energetic, economic and environmental benefits in contrast to bio-ethanol from starch or sugar. Until now, physical and chemical difficulty caused by the close connection of the main components of lignocellulosic biomass, discourage the hydrolysis of cellulose and hemicellulose to fermentable sugars. The main purpose of pretreatment is to enhance the enzyme accessibility improving digestibility of cellulose. Every pretreatment has a particular effect on the fraction of cellulose, hemicellulose and lignin, thus different pretreatment methods and conditions should be selected for the development of subsequent hydrolysis and fermentation steps. This paper reviews the most importance technologies for ethanol production from lignocellulose and its represent several vital qualities that should be marked for low-price and promote pretreatment processes.

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“…Ozonation degrades lignin more specifically [149], whereas alkaline hydrogen peroxide pretreatment leads to the removal of significant amounts of both lignin and hemicellulose. Oxygen pretreatment (wet oxidation) combines the lignin degradation action of oxygen with the acid hydrolysis action from the solubilized acetic acid of the biomass leading to the oxidative degradation of lignin and the acidic hydrolysis of hemicellulose, but degradation of hemicellulose sugars to organic acids can also take place under the oxidative regime of the process [150].…”

Section: Pretreatment Of Lignocellulosic Biomass In Bioethanol Producmentioning

confidence: 99%

Biofuels Get in the Fast Lane: Developments in Plant Feedstock Production and Processing

Triantafyllidis¹

2013

Adv Crop Sci Tech

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In recent years, high volatility in oil prices and global climate change led to an increased interest in biofuel production to reduce dependency on foreign fossil fuel. Domestically produced plant feedstocks are environmentally friendly renewable substitutes for fossil-derived fuel and are expected to stabilize fuel prices. Plant-derived energy can offer rural development and other environmental, social and energy security benefits for local societies. Crops, grasses, trees, forest-residues and aquatic plants, all can be used as potential biofuel feedstocks. To meet the increased global and regional demand for bioenergy, evaluation and improvement of current and emergent plant feedstocks is urgently needed to reduce the cost of the resulting biofuels.

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Biomass pretreatment with water and high-pressure oxygen. The wet-oxidation process

Cited by 113 publications

References 6 publications

Potential bioethanol and biogas production using lignocellulosic biomass from winter rye, oilseed rape and faba bean

Potential bioethanol and biogas production using lignocellulosic biomass from winter rye, oilseed rape and faba bean

Pretreatments to Enhance the Digestibility of Wheat Straw

Biofuels Get in the Fast Lane: Developments in Plant Feedstock Production and Processing

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