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Extraction of Hemicellulose from Corn Stover by KOH Solution Pretreatment and its Characterization

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Abstract:

In this work, hemicellulose was extracted from corn stover by pretreatment with potassium hydroxide (KOH) solution, and the influences of pretreatment conditions on hemicellulose extraction were investigated. The dissolution rate of xylan from the raw material was used to indicate the extraction yield of the hemicellulose. The results showed that under the conditions of temperature 85 °C, alkali concentration 6%, liquor/solid ratio 8:1 and time 120 min, high xylan extraction yield of 43.74% (based on the xylose content of raw material) was achieved. The content of saccharides and uronic acids in the hemicellulose was 80.22%. The hemicellulose was characterized by FT-IR and TG/DTG after being separated from the hydrolysates by precipitation of the neutralized hydrolysate with 3 times volumes of ethanol.

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Periodical:

Advanced Materials Research (Volumes 821-822)

Pages:

1065-1070

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.821-822.1065

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Online since:

September 2013

Authors:

Jing Hui Zhou, Jun Ying Zhang, Hai Ming Li, Guang Wei Sun, Fu Zheng Liang

Keywords:

Corn Stover, Hemicellulose, KOH, Pretreatment, Xylan

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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