Study on Benzene/ethanol Extractives of Eucalyptus Urophylla Chips for Bioenergy with High Added Value by Py-GC/MS

The increasing demand for paper in Asia is being met by the use of Eucalyptus urophylla to a large extent. However, some pulp mills may be forcedly closed because the Eucalyptus urophylla chips contain extractives severely enough to pollute the water. In this paper, the chemical components in the benzene/ethanol extractives of Eucalyptus urophylla chips were isolated and identified by Py-GC/MS to produce bioenergy with high added value. 114 compounds in the extractives were identified. The mainly abundant constituents were .beta.- sitosterol (10.00%), acetic acid (7.34%), phenol, 2 ,6-dimethoxy- (4.95%), 6H-dibenzo[b,d]pyran-6-one, 7, 9-dihydroxy-3-methoxy- 1-methyl- (4.09%), phenol, 2-methyl- (3.71%), sesquirosefuran (3.36%), carbon dioxide (2.56%), acetone (2.49%), ethanone, 1- (3-methoxyphenyl)- (2.31%), stigmasterol (2.19%), etc. The most components from benzene /ethanol extractives of fresh Eucalyptus urophylla wood are not only abundant and healthy to human, but also can be used as fine bioenergy.