Fractionation of herbaceous biomass by ammonia-hydrogen peroxide percolation treatment

Kim, Sung‐Bae; Lee, Yoon Y.

doi:10.1007/bf02941695

Cited by 61 publications

(27 citation statements)

References 9 publications

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“…The details of experimental apparatus were described elsewhere (13). A metering pump (TSP Minipump) supplied various solutions into the percolation reactor through a preheating coil.…”

Section: Pretreatmentmentioning

confidence: 99%

Effect of Pretreatment Reagent and Hydrogen Peroxide on Enzymatic Hydrolysis of Oak in Percolation Process

Kim

Park

2001

Twenty-Second Symposium on Biotechnology for Fuels and Chemicals

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The effect of pretreatment reagent and hydrogen peroxide on enzymatic digestibility of oak was investigated to compare pretreatment performance. Pretreatment reagents used were ammonia, sulfuric acid, and water. These solutions were used without or in combination with hydrogen peroxide in the percolation reactor. The reaction was carried out at 170°C for the predetermined reaction time. Ammonia treatment showed the highest delignification but the lowest digestibility and hemicellulose removal among the three treatments. Acid treatment proved to be a very effective method in terms of hemicellulose recovery and cellulose digestibility. Hemicellulose recovery was 65-90% and digestibilities were >90% in the range of 0.01-0.2% acid concentration. In both treatments, hydrogen peroxide had some effect on digestibility but decomposed soluble sugars produced during pretreatment. Unlike ammonia and acid treatments, hydrogen p~roxidein water treatment had a certain effect on hemicellulose recovery as well as delignification. At 1.6% hydrogen peroxide concentration, both hemicellulose recovery and digestibility were about 90%, which were almost the same as those of 0.2% sulfuric acid treatment. Also, digestibility was investigated as a function of hemicellulose removal or delignification. It was found that digestibility was more directly related to hemicellulose removal rather than delignification.

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“…The details of experimental apparatus were described elsewhere (13). A metering pump (TSP Minipump) supplied various solutions into the percolation reactor through a preheating coil.…”

Section: Pretreatmentmentioning

confidence: 99%

Effect of Pretreatment Reagent and Hydrogen Peroxide on Enzymatic Hydrolysis of Oak in Percolation Process

Kim

Park

2001

Twenty-Second Symposium on Biotechnology for Fuels and Chemicals

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“…Pretreatment methods operated at low pH including steam explosion [2,3], hot water treatment [4][5][6], controlled pH treatment, and dilute acid treatment [7,8] remove substantial amount of hemicellulose. On the other hand, pretreatment methods applying high pH such as ammonia fiber explosion [9][10][11], lime pretreatment [12,13], and ammonia recycle percolation (ARP) [14,15] show little effect on hemicellulose but high interaction with lignin. In low pH pretreatments, the liquid contains hemicellulose sugars and other degradation byproducts.…”

mentioning

confidence: 99%

Substrate Dependency and Effect of Xylanase Supplementation on Enzymatic Hydrolysis of Ammonia-Treated Biomass

Gupta

Kim

Lee

2007

Appl Biochem Biotechnol

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Pretreatment based on aqueous ammonia was investigated under two different modes of operation: soaking in aqueous ammonia and ammonia recycle percolation. These processes were applied to three different feedstocks with varied composition: corn stover, high lignin (HL), and low lignin (LL) hybrid poplars. One of the important features of ammonia-based pretreatment is that most of the hemicellulose is retained after treatment, which simplifies the overall bioconversion process and enhances the conversion efficiency. The pretreatment processes were optimized for these feedstocks, taking carbohydrate retention as well as sugar yield in consideration. The data indicate that hybrid poplar is more difficult to treat than corn stover, thus, requires more severe conditions. On the other hand, hybrid poplar has a beneficial property that it retains most of the hemicellulose after pretreatment. To enhance the digestibility of ammonia-treated poplars, xylanase was supplemented during enzymatic hydrolysis. Because of high retention of hemicellulose in treated hybrid poplar, xylanase supplementation significantly improved xylan as well as glucan digestibility. Of the three feedstocks, best results and highest improvement by xylanase addition was observed with LL hybrid poplar, showing 90% of overall sugar yield.

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“…ARP has also been trialled with a pre-soaking stage using a very dilute acid soak or a hot water soak. This resulted in improved delignification and dissolution of hemicellulose and improved saccharification of cellulose [153][154][155].…”

Section: Alpine Pretreatmentmentioning

confidence: 99%

Lignocellulosics as a Renewable Feedstock for Chemical Industry: Chemical Hydrolysis and Pretreatment Processes

O’Hara

Zhang

Doherty

et al. 2011

Green Chemistry for Environmental Remediation

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Fractionation of herbaceous biomass by ammonia-hydrogen peroxide percolation treatment

Cited by 61 publications

References 9 publications

Effect of Pretreatment Reagent and Hydrogen Peroxide on Enzymatic Hydrolysis of Oak in Percolation Process

Effect of Pretreatment Reagent and Hydrogen Peroxide on Enzymatic Hydrolysis of Oak in Percolation Process

Substrate Dependency and Effect of Xylanase Supplementation on Enzymatic Hydrolysis of Ammonia-Treated Biomass

Lignocellulosics as a Renewable Feedstock for Chemical Industry: Chemical Hydrolysis and Pretreatment Processes

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