HEMICELLULOSE EXTRACTION OF HERBACEOUS BIOMASS AND THE EFFECT ON THEIR PULPABILITY
A potential biorefinery envisioned is to produce both fuel and fiber from bioenergy crops through fractionation of the hemicelluloses portion to create transportation fuels such as ethanol, while utilizing the cellulose portion for fiber to be used in paper making. To understand the impact of hemicellulose removal on pulpability and properties, a hot-water extraction was performed on three herbaceous biomass samples (Switch Grass, Miscanthus, and Corn Stover) and the resulting biomass was pulped. The research determined that 45％~60％ (w/w) of hemicellulose (mainly of xylan) could be extracted from these three biomasses under conditions of 170C, 60min, 6/1 ratio. Soda-anthraquinone (Soda-AQ) was performed on the extracted and non-extracted biomass to determine the effect of extraction on pulpability. Results showed that the extracted biomass had higher lignin content and lower yields under the same cooking conditions. The extracted soda-AQ pulps could be bleached up to 85％ISO brightness by a D(EP)DP sequence. These hotwater extracted biomass pulps were found to have a lower proportion of hemicelluloses than that of the extracted materials even after pulping, which may be responsible for a portion of the degraded strength properties. Overall lower yield and pulp properties indicate additional optimization will be needed for this type of a biorefinery to create fuel and fiber.
biorefinery hemicellulose water extraction pulpability bleaching
Chunhui Zhang Troy Runge Pamella Wipperfurth
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology Guangzhou, Department of Biological System Engineering, University of Wisconsin-Madison, Madison, WI, 53706, US
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
571-574
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）