湖南耐寒桉树主要化学性质的分析

对湖南引种的邓恩桉、多枝桉、赤桉、巨桉、广叶桉、樟脑桉、小果灰桉等7种桉树进行了化学成分与热值的测定.结果表明:其化学性质与国内引种的桉树相比略有差异,纤维素含量较低,在41%~45%之间,木素含量较高,在24%~30%之间,多戊糖含量较高,在20%~29%之间,有机抽提物、冷水抽提物、热水抽提物含量较低,1%N aOH抽提物含量较高;其热值分析结果与煤、石油其它燃料相比,热值较小,灰分少,没有硫磺等污染物.

Primary Chemical Characters of Cold-resistant Eucalyptus Introduced to Hunan Province

This article analyzes the chemical characters, and measures the caloric, of Eucalyptus dunnii; E. viminalis; E. camaldulensis; E. grandis ; E. amplifolia ; E, camphore and E. propinqua. Results show that ; the cellulose content of these 7 types of Eucalyptus is low, about 41%-45%; their lignin content high, about 24%-30%; their pentosus content also high, about 20%- 29%; the contents of their organic extractions, cold water extractions and hot water extractions are all low; hut the content of 1% NaOH extractions is high and the contents of benzene and ethanol extractions are higher than those of broadleaf species. The heat values of E. camaldulensis and E. propinqua are high; next follows E. viminalis. Compared with other fuels like coal or petroleum, their heat values are low with little ash and no sulphur pollutants.