Delignification kinetics of corn stover in lime pretreatment

Kim, Sehoon; Holtzapple, Mark T.

doi:10.1016/j.biortech.2005.04.002

Cited by 114 publications

(66 citation statements)

References 6 publications

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“…In the terminal stage or residual period, the cleavage of carbon-carbon bonds in lignin molecule as well as carbohydrate degradation occurs. 27,28 Lignin removal or dissolution rate could be expressed as a first-order mechanism…”

Section: Kinetics Of Delignificationmentioning

confidence: 99%

Delignification of intact biomass and cellulosic coproduct of acid‐catalyzed hydrolysis

2015

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The kinetics of acid-catalyzed hemicellulose removal and also alkaline delignification of oat hull biomass were investigated. All three operational parameters namely, catalyst concentration (0.10-0.55 N H 2 SO 4 ), temperature (110-130 C), and residence time (up to 150 min) affected the efficiency of hemicellulose removal, with 100% of hemicellulose removed by appropriate selection of process parameters. Analysis of delignification kinetics (in the temperature range of 30-100 C) indicated that it can be expressed very well by a two-phase model for the crude biomass and also for the hemicellulose-prehydrolyzed material. The application of acid-catalyzed prehydrolysis improved the capacity of lignin dissolution especially at lower temperatures (30 and 65 C) and accelerated the dissolution of lignin. This acceleration of delignification by prehydrolysis was possible at all levels of temperature in the bulk phase; however, results were more significant at the lower temperatures in the terminal phase.

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Section: Kinetics Of Delignificationmentioning

confidence: 99%

Delignification of intact biomass and cellulosic coproduct of acid‐catalyzed hydrolysis

2015

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“…A different approach to pretreatment issues is to use genomics and plant science to develop biomass crops with enhanced decomposition rates, such as those with cell walls more easily digested by bacteria (Ragauskas et al 2006). Delignification of corn stover is actively being investigated by Holtzapple and coworkers (Kim and Holtzapple 2005, 2006a, 2006b). …”

Section: Non-sugar Fermentationmentioning

confidence: 99%

Survey of Alternative Feedstocks for Commodity Chemical Manufacturing

McFarlane¹,

Robinson²

2008

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“…In the several species of lignin approach, the different phases observed during delignification correspond to changes in the mechanism that controls the reaction rate of the overall process (Parajó et al, 1995;Vázquez et al, 1995). The chemical kinetics of alkaline pretreatment processes have been demonstrated in the scientific literature (Kleinert, 1966;Kim and Holtzapple, 2006). The Shea tree, Vitellaria paradoxa, is rich in carbohydrate and lignin contents (Ayeni et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

EFFECTIVE ALKALINE PEROXIDE OXIDATION PRETREATMENT OF SHEA TREE SAWDUST FOR THE PRODUCTION OF BIOFUELS: KINETICS OF DELIGNIFICATION AND ENZYMATIC CONVERSION TO SUGAR AND SUBSEQUENT PRODUCTION OF ETHANOL BY FERMENTATION USING Saccharomyces cerevisiae

Ayeni

Omoleye

Hymore

et al. 2016

Braz. J. Chem. Eng.

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-Shea tree sawdust delignification kinetic data during alkaline peroxide pretreatment were investigated at temperatures of 120 °C, 135 °C, and 150 °C. The activation energy during delignification was 76.4 kJ/mol and the Arrhenius constant was calculated as 8.4 x 10 6 per min. The reducing sugar yield for the treated to the untreated biomass was about 22-fold. Enzymatic hydrolysis conditions studied were; time (72 h and 96 h), substrate concentration (20, 30, 40, and 50 g/L), and enzyme loadings (10, 25, 40, 50 FPU/g dry biomass), which showed the optimum conditions of 96 h, 40 g/L, and 25 FPU/g dry biomass at 45 °C hydrolysis temperature. At the optimized enzymatic hydrolysis conditions, the reducing sugar yield was 416.32 mg equivalent glucose/g treated dry biomass. After 96 h fermentation of treated biomass, the ethanol obtained at 2% effective cellulose loading was 12.73 g/L. Alkaline peroxide oxidation pretreatment and subsequent enzymatic hydrolysis improved the ethanol yield of the biomass.

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Delignification kinetics of corn stover in lime pretreatment

Cited by 114 publications

References 6 publications

Delignification of intact biomass and cellulosic coproduct of acid‐catalyzed hydrolysis

Delignification of intact biomass and cellulosic coproduct of acid‐catalyzed hydrolysis

Survey of Alternative Feedstocks for Commodity Chemical Manufacturing

EFFECTIVE ALKALINE PEROXIDE OXIDATION PRETREATMENT OF SHEA TREE SAWDUST FOR THE PRODUCTION OF BIOFUELS: KINETICS OF DELIGNIFICATION AND ENZYMATIC CONVERSION TO SUGAR AND SUBSEQUENT PRODUCTION OF ETHANOL BY FERMENTATION USING Saccharomyces cerevisiae

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