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A Novel Ionic Liquid Pretreatment of...

Dadi, Anantharam P.

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A Novel Ionic Liquid Pretreatment of Lignocellulosic Biomass for Production of Ethanol.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A Novel Ionic Liquid Pretreatment of Lignocellulosic Biomass for Production of Ethanol./
作者:	Dadi, Anantharam P.
面頁冊數:	201 p.
附註:	Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1022.
Contained By:	Dissertation Abstracts International72-02B.
標題:	Chemical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3438550
ISBN:	9781124422466

A Novel Ionic Liquid Pretreatment of Lignocellulosic Biomass for Production of Ethanol.
Dadi, Anantharam P.

A Novel Ionic Liquid Pretreatment of Lignocellulosic Biomass for Production of Ethanol. - 201 p.

Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1022.

Thesis (Ph.D.)--The University of Toledo, 2008.

This item is not available from ProQuest Dissertations & Theses.

The inevitable decrease of the world's energy supply due to depletion of nonrenewable petroleum based fuels has necessitated the demand for alternative sources of energy. Production of ethanol as a renewable fuel from lignocellulosic biomass, the most abundant renewable material on the earth, provides a promising alternative source of energy. The many different types of lignocellulosic biomass, including agricultural residues, herbaceous crops, deciduous (hardwood) and coniferous (softwood) trees and municipal solid wastes provide low cost raw material for production of fuel ethanol. Utilization of ethanol as a transportation fuel has environmental benefits and can potentially meet a portion of the increasing demands of energy requirements. One of the most crucial processing steps required for the conversion of lignocellulosic biomass to sugars for fermentation to ethanol is a thermo chemical or biochemical pretreatment step.

ISBN: 9781124422466Subjects--Topical Terms:

560457
Chemical engineering.

A Novel Ionic Liquid Pretreatment of Lignocellulosic Biomass for Production of Ethanol.
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245 1 2 $a A Novel Ionic Liquid Pretreatment of Lignocellulosic Biomass for Production of Ethanol.
300 $a 201 p.
500 $a Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1022.
500 $a Advisers: Sasidnar Varanasi; Constance A. Anderson.
502 $a Thesis (Ph.D.)--The University of Toledo, 2008.
506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a The inevitable decrease of the world's energy supply due to depletion of nonrenewable petroleum based fuels has necessitated the demand for alternative sources of energy. Production of ethanol as a renewable fuel from lignocellulosic biomass, the most abundant renewable material on the earth, provides a promising alternative source of energy. The many different types of lignocellulosic biomass, including agricultural residues, herbaceous crops, deciduous (hardwood) and coniferous (softwood) trees and municipal solid wastes provide low cost raw material for production of fuel ethanol. Utilization of ethanol as a transportation fuel has environmental benefits and can potentially meet a portion of the increasing demands of energy requirements. One of the most crucial processing steps required for the conversion of lignocellulosic biomass to sugars for fermentation to ethanol is a thermo chemical or biochemical pretreatment step.
520 $a The highly recalcitrant nature of biomass to hydrolysis to monomeric sugars necessitates a pretreatment technique to make the biomass amenable for enzymatic saccharification. An efficient pretreatment technique is intended to produce a biomass substrate with increased surface area, increased pore volume and decreased cellulose crystallinity, which can be rapidly hydrolyzed by enzymes to sugars. However, most of the current pretreatment methods do not effectively disrupt biomass structure, especially the crystallinity of cellulose. As a result, the rate of enzymatic production of sugars is quite slow (72 to 168 hours to reach theoretical yields of sugars), which is an impediment for commercial production of ethanol from the enzymatic route. Some of the pretreatment techniques involve harsh pretreatment conditions with acids, high temperatures or pressures, which require high capital investment. These severe conditions often result in the formation of sugar degradation products which are strong fermentation inhibitors, leading to poor yields of fuel ethanol.
520 $a To address the above mentioned challenges, a novel "ionic liquid pretreatment technique" was developed in this study. In a systematic approach, ionic liquids were first screened and studied on model microcrystalline cellulose (Avicel PH101 from Sigma Aldrich). The ionic liquids screened for Avicel were used for developing pretreatment conditions for lignocellulosic biomass. Various lignocellulosic biomass feedstocks from hardwoods (poplar), agricultural residues (corn stover, rice hulls, wheat straw and alfalfa stems and leaves and herbaceous energy crops (switchgrass) were pretreated with ionic liquid pretreatment followed by enzymatic hydrolysis and fermentation.
520 $a The effectiveness of the ionic liquid pretreatment process was successIiilly demonstrated at moderate conditions of temperature and pressure on various lignocellulosic biomass feedstocks. Ionic liquid treated substrates were found to be easily digestible by enzymes (for hydrolysis to sugars) and fermenting microorganisms (conversion of sugars to ethanol). Ionic liquid treated substrates could be rapidly hydrolyzed to sugars and fermented to theoretical yields of ethanol (from glucan content) within 15-24 hours of combined enzymatic hydrolysis and fermentation.
590 $a School code: 0232.
650 4 $a Chemical engineering. $3 560457
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710 2 $a The University of Toledo. $3 1023352
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791 $a Ph.D.
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793 $a English
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