A novel combined pretreatment of ball milling and microwave irradiation for enhancing enzymatic hydrolysis of microcrystalline cellulose

Peng, Huadong; Li, Hongqiang; Luo, Haiyun; Xu, Jian

doi:10.1016/j.biortech.2012.10.167

Cited by 84 publications

(38 citation statements)

References 35 publications

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“…The crystallinity has been found to have a greater impact on enzymatic hydrolysis than other structural characteristics such as the degree of polymerization of the cellulose (DP), or the specific surface area (SSA) (Peng et al 2013). Cellulose with a lower CrI is more susceptible to hydrolysis because of its loose structure Hendriks and Zeeman 2009).…”

Section: Introductionmentioning

confidence: 99%

“…For example, during hydrolysis in hot-compressed water (HCW), the hydrolysis reactions of amorphous cellulose is considerably faster than for crystalline cellulose (Yu and Wu 2011;Yu and Wu 2010). For enzymatic hydrolysis of microcrystalline cellulose, it has also been reported that the lower cellulose CrI, the higher will be the sugar yield and the faster will be the hydrolysis reaction rate (Fan et al 1981;Peng et al 2013;Wang et al 2006). However, besides the intrinsic crystalline structure of microcrystalline cellulose, the availability of enzymes is also an important factor that determines the reaction rate of enzymatic hydrolysis of microcrystalline cellulose.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Relationship between Crystallinity Index and Enzymatic Hydrolysis Performance of Celluloses Separated from Aquatic and Terrestrial Plant Materials

Li¹,

Zhou²,

Wu³

et al. 2014

BioResources

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a Hydrolysis experiments of five cellulose samples (separated from two aquatic plants and three terrestrial plants, respectively) were conducted at various cellulase loadings (7 to 200 FPU/g cellulose). No obvious correlation was found between CrI and hydrolysis performance at low enzyme loadings (e.g. 7 and 28 FPU/g cellulose), as the hydrolysis was controlled by enzyme availability and the differences in cellulose structure were unimportant. At a sufficiently high enzyme loading (e.g. 200 FPU/g cellulose), the yield of reducing sugar was linearly proportional to the CrI value. Therefore, to establish such a correlation between cellulose structure and hydrolysis performance, hydrolysis experiments must be conducted under the conditions where enzyme availability is not a limiting factor. It was found that celluloses from sugarcane bagasse and water hyacinth have low CrI, achieve high sugar yields, exhibit fast reactions during enzymatic hydrolysis at low enzyme loadings, and can potentially be good feedstocks for bio-ethanol production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Relationship between Crystallinity Index and Enzymatic Hydrolysis Performance of Celluloses Separated from Aquatic and Terrestrial Plant Materials

Li¹,

Zhou²,

Wu³

et al. 2014

BioResources

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“…A novel, environment-friendly, and effective pretreatment for biomass was reported using combined ball milling and microwave irradiation [42]. It has been shown that combined ball milling for 1 h with microwave irradiation for 20 min can replace BM3 (ball milling for 3 h) and BM6 (ball milling for 6 h) with the same or higher glucose yield while saving 54.8% and 77.4% energy consumption, respectively.…”

Section: Microwave-assisted Physical Pretreatmentmentioning

confidence: 99%

Microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to sugars and ethanol: a review

Puligundla

Oh²,

Mok³

2016

Carbon letters

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Lignocellulosic biomass conversion to biofuels such as ethanol and other value-added bio-products including activated carbons has attracted much attention. The development of an efficient, cost-effective, and eco-friendly pretreatment process is a major challenge in lignocellulosic biomass to biofuel conversion. Although several modern pretreatment technologies have been introduced, few promising technologies have been reported. Microwave irradiation or microwave-assisted methods (physical and chemical) for pretreatment (disintegration) of biomass have been gaining popularity over the last few years owing to their high heating efficiency, lower energy requirements, and easy operation. Acid and alkali pretreatments assisted by microwave heating meanwhile have been widely used for different types of lignocellulosic biomass conversion. Additional advantages of microwave-based pretreatments include faster treatment time, selective processing, instantaneous control, and acceleration of the reaction rate. The present review provides insights into the current research and advantages of using microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to fermentable sugars in the process of cellulosic ethanol production.

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“…A reduction in the crystallinity of cellulose must be achieved by various methods to improve the availability and accessibility of cellulose to reagents. There are several methods involving the physical and chemical pretreatment of cellulose (Zhao et al 2006;Moharram and Mahmoud 2008;Peng et al 2013). The most popular pretreatment incorporates physical and chemical methods, including microwave alkali treatment and ultrasonic alkali treatment (Khajavi et al 2013;Peng et al 2013;Ni et al 2014Ni et al , 2015.…”

Section: Introductionmentioning

confidence: 99%

“…There are several methods involving the physical and chemical pretreatment of cellulose (Zhao et al 2006;Moharram and Mahmoud 2008;Peng et al 2013). The most popular pretreatment incorporates physical and chemical methods, including microwave alkali treatment and ultrasonic alkali treatment (Khajavi et al 2013;Peng et al 2013;Ni et al 2014Ni et al , 2015. However, these pretreatment methods require large quantities of alkali and a long processing duration of 12 to 16 h (Gurgel et al 2008a,b;Hokkanen et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Microwave-Hydrogen Peroxide Pretreatment of Cellulose

Su¹,

Zhu²,

Wang³

et al. 2016

BioResources

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A hydrogen peroxide (H2O2) solution was adapted for microwave pretreatment of microcrystalline cellulose, which can be further used for heavy metal adsorption. The H2O2 concentration, temperature, and retention time were the key factors affecting the microwave/hydrogen peroxide pretreatment process. A Box-Benhken design (BBD) with response surface methodology (RSM) was employed to design and optimize the microwave-hydrogen peroxide pretreatment process (H2O2 pretreatment) of cellulose. After the H2O2 pretreatment, the crystallinity of cellulose decreased by 20% and the degree of polymerization (DP) decreased by up to 30%. The optimal conditions obtained by BBD were a H2O2 concentration of 8.37%, a temperature of 90 °C, and a retention time 5.33 min. Under these conditions, a minimum DP of 91.74 was achieved. The results indicated that all three of the factors notably affected the reduction of cellulose polymerization degree and pronounced interactions existed among the response variables. The predictive model developed was able to optimize the pretreatment process for the reduction of cellulose polymerization degree, which could improve the cellulose modification reactivity.

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A novel combined pretreatment of ball milling and microwave irradiation for enhancing enzymatic hydrolysis of microcrystalline cellulose

Cited by 84 publications

References 35 publications

Relationship between Crystallinity Index and Enzymatic Hydrolysis Performance of Celluloses Separated from Aquatic and Terrestrial Plant Materials

Relationship between Crystallinity Index and Enzymatic Hydrolysis Performance of Celluloses Separated from Aquatic and Terrestrial Plant Materials

Microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to sugars and ethanol: a review

Optimization of Microwave-Hydrogen Peroxide Pretreatment of Cellulose

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