Delignification of wheat straw using a mixture of carboxylic acids and peroxoacids

Kham, Long; Bigot, Y. Le; Delmas, M.; Avignon, Gérard

doi:10.1016/j.indcrop.2003.12.002

Cited by 68 publications

(28 citation statements)

References 4 publications

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“…They further concluded that the presence of H 2 O 2 in organic acid solution enhanced the delignification process due to the combined effect of formic acid/acetic acid as solvent and peroxyacid as an oxidizing agent to dissolve the lignin in formic acid/acetic acid/hydrogen peroxide media [13]. This action can be explained by the action of hydroxonium ion OH + formed during the extraction stage of peroxy acids in acidic medium [14][15][16]. The produced OH + ion is a strong electrophilic agent which reacts with lignin during the delignification process [17].…”

Section: Organic Acid Fractionation Of Lignin From Different Biomass mentioning

confidence: 98%

Extraction and characterization of lignin from different biomass resources

Watkins

Nuruddin

Hosur

et al. 2015

Journal of Materials Research and Technology

591

290

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Section: Organic Acid Fractionation Of Lignin From Different Biomass mentioning

confidence: 98%

Extraction and characterization of lignin from different biomass resources

Watkins

Nuruddin

Hosur

et al. 2015

Journal of Materials Research and Technology

591

290

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“…The acetic acid or formic acid process is an effective alternative method to fractionate lignocellulosic materials to produce cellulosic pulp/other products (Poppius et al 1991;Jimenez et al 1998;Lam et al 2001;Kham et al 2005;Jahan et al 2007d;Jahan 2009). The process can be carried out at an atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

Jute as raw material for the preparation of microcrystalline cellulose

et al. 2010

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Cellulose was extracted at a yield of 59.8% from jute fibres based on the formic acid/ peroxyformic acid process at an atmospheric pressure. The amounts of dissolved lignin and hemicelluloses were determined in the spent liquor. The results showed that the spent liquor contained 10.6% total sugars and 10.9% lignin (based on jute). Microcrystalline cellulose (MCC) was further prepared from the jute cellulose based on the acid hydrolysis technique. A very high yield, 48-52.8% (based on the jute raw material) was obtained. The acid hydrolysate of cellulose contained 2.7% glucose and 0.2% xylose. The MCC samples obtained from two different conditions, one at a low acidity and the other at a high acidity, were characterized by means of Thermo Gravimetric Analysis, Fourier Transform Infrared, X-ray detraction, Scanning Electron Micrograph, and Transmission Electron Micrograph techniques.

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“…10 Consequently, it is expected that lignin degradation in a peroxide-HAc medium follows a similar pathway in peracetic acid delignification. Table 2 lists a series of lignin degradation products extracted from the pretreatment spent liquid.…”

Section: Resultsmentioning

confidence: 99%

Peroxide−Acetic Acid Pretreatment To Remove Bagasse Lignin Prior to Enzymatic Hydrolysis

Tan

Yang

Sun

et al. 2009

Ind. Eng. Chem. Res.

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This paper presents results on the features of bagasse pretreatment with peroxide and acetic acid (peroxide-HAc) aiming at selective removal of lignin to enhance enzymatic hydrolysis. Surface response methodology was employed to study the effects of major process parameters on delignification and to establish a model for the prediction of lignin removal in the process. Enzymatic hydrolysis following the pretreatment was conducted to evaluate the enhancement of biohydrolysis by the pretreatment. Results revealed that peroxide-HAc pretreatment of bagasse retained most of the carbohydrate constituents, although the delignification rate was low. Peroxide-HAc concentration, temperature, and time demonstrated significant effects on bagasse lignin removal. The relationship between lignin removal and the process parameters could be well described by a mathematical model derived from the experimental data. After treatment with 69.1% peroxide-HAc at 80°C for 26.5 h, 97.08% of lignin could be removed while keeping 68.24% hemicelluloses intact. Over 93.58% of carbohydrate in treated bagasse could be hydrolyzed with exoglucanase in a dosage of 138 FPU/g carbohydrates at 35°C within 48 h. It was thus demonstrated that treated bagasse has a much higher response toward enzymatic hydrolysis than its untreated counterpart.

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Delignification of wheat straw using a mixture of carboxylic acids and peroxoacids

Cited by 68 publications

References 4 publications

Extraction and characterization of lignin from different biomass resources

Extraction and characterization of lignin from different biomass resources

Jute as raw material for the preparation of microcrystalline cellulose

Peroxide−Acetic Acid Pretreatment To Remove Bagasse Lignin Prior to Enzymatic Hydrolysis

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