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Utility of organosolv delignificatio...

Gong, Chen.

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Utility of organosolv delignification in a hardwood biorefinery based on hot-water extraction.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Utility of organosolv delignification in a hardwood biorefinery based on hot-water extraction./
作者:	Gong, Chen.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2014,
面頁冊數:	187 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-08(E), Section: B.
Contained By:	Dissertation Abstracts International76-08B(E).
標題:	Wood sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3687335
ISBN:	9781321648584

Utility of organosolv delignification in a hardwood biorefinery based on hot-water extraction.
Gong, Chen.

Utility of organosolv delignification in a hardwood biorefinery based on hot-water extraction. - Ann Arbor : ProQuest Dissertations & Theses, 2014 - 187 p.

Source: Dissertation Abstracts International, Volume: 76-08(E), Section: B.

Thesis (Ph.D.)--State University of New York College of Environmental Science and Forestry, 2014.

The aim of this research was to recommend an efficient fractionation sequence for hardwoods, using a few selected species, to generate relatively clean streams of cellulose, hemicelluloses, and lignin for a viable biorefinery. The fractionation sequence included a mild pretreatment, hot-water extraction, and various organosolv processes using reagents selected from a range of designed (by)products from hot-water extraction (HWE), aiming to integrate the biorefinery. The selected organosolv process, acetone-water with oxygen (AWO), was the most efficient approach for the delignification of extracted wood, sugar maple (Acer saccharum) resulting in most of the lignin. ALCELL delignification, however, was found most efficient on unextracted sugar maple. The HWE-AWO sequence was successfully applied on other hardwood species, including Eucalyptus urograndis, Paulownia tomentosa, and Paulownia elongata. The encouraging results of these experiments suggested the feasibility of this fractionation approach.

ISBN: 9781321648584Subjects--Topical Terms:

3168288
Wood sciences.

Utility of organosolv delignification in a hardwood biorefinery based on hot-water extraction.
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500 $a Source: Dissertation Abstracts International, Volume: 76-08(E), Section: B.
500 $a Adviser: Biljana M. Bujanovic.
502 $a Thesis (Ph.D.)--State University of New York College of Environmental Science and Forestry, 2014.
520 $a The aim of this research was to recommend an efficient fractionation sequence for hardwoods, using a few selected species, to generate relatively clean streams of cellulose, hemicelluloses, and lignin for a viable biorefinery. The fractionation sequence included a mild pretreatment, hot-water extraction, and various organosolv processes using reagents selected from a range of designed (by)products from hot-water extraction (HWE), aiming to integrate the biorefinery. The selected organosolv process, acetone-water with oxygen (AWO), was the most efficient approach for the delignification of extracted wood, sugar maple (Acer saccharum) resulting in most of the lignin. ALCELL delignification, however, was found most efficient on unextracted sugar maple. The HWE-AWO sequence was successfully applied on other hardwood species, including Eucalyptus urograndis, Paulownia tomentosa, and Paulownia elongata. The encouraging results of these experiments suggested the feasibility of this fractionation approach.
520 $a The effect of HWE on the delignification processes was investigated. The observed high increase in the PhOH-group content after HWE, contributing to a higher reactivity of lignin during the delignification stage, indicates the cleavage of aryl ether lignin linkages and phenyl glycosidic lignin-carbohydrate bonds. This beneficial effect of HWE was more pronounced for wood species with a higher S/G ratio. It was observed that lignin of higher purity was recovered at higher yields from organosolv spent liquor of hot-water extracted wood than from that of unextracted wood. The recovered lignin maintained lignin core structures with almost no contaminants, indicating its good potential for high-value applications.
520 $a Studies of washing and oxygen delignification of organosolv pulp were also initiated. The procedures applied on both AWO and kraft pulps produced from hot-water extracted sugar maple to the approximately same kappa number were more successful on AWO pulp: the residual lignin was easier to remove during washing procedure and had a higher reactivity during oxygen delignification.
520 $a A two-level factorial design was applied to investigate the effect of variables on delignification and lignin isolation during AWO of hot-water extracted sugar maple. It was reviewed that oxygen was the most significant factor, while the effect of other variables were ranked depending on the different goals (i.e., delignification or lignin recovery).
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