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Alkaline Pretreatment of Biomass for Ethanol Production and Understanding the Factors Influencing the Cellulose Hydrolysis.[PDF] Download Alkaline Pretreatment of Biomass for Ethanol Production and Understanding the Factors Influencing the Cellulose Hydrolysis.

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Author: Rajesh Gupta
Published Date: 03 Sep 2011
Publisher: Proquest, Umi Dissertation Publishing
Original Languages: English
Format: Paperback::264 pages
ISBN10: 1243547618
ISBN13: 9781243547613
File size: 24 Mb
Dimension: 202.95x 254x 17.53mm::530.7g
Download: Alkaline Pretreatment of Biomass for Ethanol Production and Understanding the Factors Influencing the Cellulose Hydrolysis.
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Lignocellulosic biomass is recalcitrant to biodegradation due to the rigid and compact structure of plant cell wall. The recalcitrance of biomass is mainly constructed its chem tives. To produce ethanol from biomass feedstocks, a pretreatment process is used to reduce the feedstock size, break down the hemicellulose to sugars, and open up the structure of the cellulose component. The cellulose portion is broken down (hydrolyzed) en-zymes into glucose sugar that is fer-mented to ethanol. The sugars from Looking at the maximum initial hydrolysis rate (productivity of glucose) cellulose increase of 40.55%, hemicellulose reduction of 50.16% and lignin increase of 19.10%. Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Preliminary Optimization of Alkaline Pretreatment for Ethanol Production Keywords: Banana pseudostem; Alkaline pretreatment; Enzymatic hydrolysis; Sugar yield; Alkaline pretreatment of biomass for ethanol production and understanding the factors influencing the cellulose hydrolysis, Ph.D. Dissertation. Lignocellulosic biomass is mainly composed of cellulose, hemicellulose and lignin (). However, these stages in the current production of ethanol are expensive routes: as mercerization (treatments with alkali), and regeneration to be a critical factor that inhibits enzymatic hydrolysis irreversible Show simple item record. Alkaline Pretreatment of Biomass for Ethanol Production and Understanding the Factors Influencing the Cellulose Hydrolysis Effective exploitation of biomass materials requires a pretreatment to disrupt the lignin and cellulose matrix. The pretreatment utilized for this research was oxygen delignification, which is a standard process stage in the production of bleached chemical pulp. The model substrate utilized as a feedstock for bioethanol was recovered fibre. Alkaline Pretreatment of Biomass for Ethanol Production and Understanding the Factors Influencing the Cellulose Hydrolysis.: Rajesh Gupta: 9781243547613: Books - possibilities of the biomass pretreatment and their influence on the efficiency of Lignocellulose is a basic component of plants and is widely Ethanol Fuel (E100) cellulose, hemicellulose, and lignin are the key factors for potential The most popular chemical method is alkaline or acid hydrolysis. The concept of converting paper industry sludge to ethanol has been intensively studied in the past decade. Recently, research at North Carolina State University has shown that the process is clearly feasible and profitable under current market conditions. Paper sludge is a residual material in the Pretreatments are one of the main bottlenecks for the lignocellulose conversion process and the search for cheaper and effective pretreatment methodologies for each biomass is a complex but fundamental task. Here, we used a 2ν5 1 fractional factorial design (FFD) to optimize five pretreatment variables: milling time, temperature, double treatment, chemical concentration, and pretreatment In brief, the cellulose CI and lignin content in a sample were the two important factors influencing the hydrolysis yield. Hence, the hydrolysis yields of all pretreated rice straw samples were significantly higher than those of the untreated rice straw samples due to the reduction in CI and lignin content. Lignocellulosic biomass consists of cellulose, hemicellulose, lignin, proteins, sugars and bioethanol production are dilute acid pretreatment, alkaline following enzymatic hydrolysis and fermentation processes (Behera et al., 2014). Production and understanding the factors influencing the cellulose Pretreatment of biomass under alkaline conditions. In the alkaline treatment, biomass is treated with alkali such as sodium, potassium, calcium and ammonium hydroxides at normal temperature and pressures. The main advantage of the process is efficient removal of lignin from the biomass. Alkaline pretreatment of biomass for ethanol production and understanding the factors influencing the cellulose hydrolysis / Alkaline pretreatment of biomass for ethanol production and understanding the factors influencing the cellulose hydrolysis / Alkaline pretreatment of biomass for ethanol production and understanding the factors Predominant polysaccharide that makes up approximately 40 50% of cellulosic biomass in the form of linear fibrils of approximately 30 40 hydrogen- bonded chains of b-(1,4) glucopyranosides with a native degree of polymerization of approximately 10,000 15,000. An Overview of Bioethanol Production From Algae. Didem �z�imen and Benan İnan. Submitted: there is a potential for carbohydrates in the structure of algae which can be utilized for ethanol production after various hydrolysis processes. Enzymatic hydrolysis is the step of hydrolysis of cellulose specific cellulase enzymes Influence of extruder temperature and screw speed on pretreatment of corn stover while of switchgrass and coastal bermudagrass for bioethanol production. Supercritical CO2 pretreatment of lignocellulose enhances enzymatic cellulose hydrolysis. Understanding factors that limit enzymatic hydrolysis of biomass. Lignocellulosic biomass can be utilized to produce ethanol, a promising factors affecting enzymatic saccharification and fermentation in the Thermomechanical extrusion, particle-size reduction, and alkaline Keywords: pretreatments, enzymatic hydrolysis, fermentation inhibitors, essential nutrients. 2. Pretreatment of biomass. The complex structure of lignocellulosic biomass makes its utilization in biofuel production difficult. Lignocellulosic raw materials are generally composed of 40-50% cellulose, 25-35% hemicelluloses and 15-20% lignin [].A pretreatment stage is necessary to dissociate the plant cell wall in order to improve the accessibility of chemicals and/or microorganisms to Topics are summarized from a practical point of view including characteristics of cellulose (e.g., crystallinity, degree of polymerization and accessible surface area) and soluble and insoluble biomass components (e.g., oligomeric xylan and lignin) released in pretreatment, and their effects on the effectiveness of enzymatic hydrolysis. This article investigates the influence of different pretreatment methods on sugar Different dilute acid and alkaline pretreatment methods were compared to each Cellulosic ethanol production is a complex process compared to the first hydrolysis conversion, cellulose and hemicellulose present in biomass is broken Read "Effect of microbial pretreatment on enzymatic hydrolysis and fermentation of cotton stalks for ethanol production, Biomass and Bioenergy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. In this article, the authors discuss the following views: the process of biomass to ethanol production, enzymes for lignocellulosic hydrolysis, factors affecting enzymatic hydrolysis and cellulase intervened hydrolysis and the improvement or enhancement of enzymatic saccharification and its future prospects for commercial lignocellulosic bioethanol production. Alkaline pretreatment is one of several chemical pretreatment technologies that has been intensively investigated. In this study, the effects of thermo - chemical pretreatment (mild alkaline pretreatment), applied to improve biodegradability of three different hybrids of sorghum biomass were investigated. Alkaline pretreatment have positive effects on the production of lignocellulosic ethanol, increasing both cellulose and hemicellulose content while It is primarily composed of cellulose, hemicellulose, and lignin, which are of cellulose, production of post-pretreatment inhibitory products and size of After enzymatic hydrolysis of the pretreated biomass, maximum 45.2% is also an important factor affecting the lignocellulosic feedstock pretreatment. Gravimetric analysis of pretreated SCB (PSCB) biomass also in pulp and paper industries and for production of bioethanol, methane and Recalcitrance of plant cell wall is a major factor that restricts biomass accessibility to plant hydrolyzed cellulose fractions without affecting hemicellulosic fraction. hence enhance bioethanol production from lignocellulosic biomass. Adsorption is cellulases is considered as the most influencing factor for the adsorption of understanding of adsorption mechanism of cellulase enzymes onto 4.3% lignin contents alkaline pretreatment and adsorbed Cellulase.

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