杉木根的干馏及干馏可燃气的组成
Fir root dry distillation and composition of combustible gases
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摘要: 以杉木根为原料，通过干馏的方法制备干馏杉木精油，木醋液、木焦油、木炭及可燃气体。重点研究了不凝性可燃气体在不同温度区间的释放及气体中CO、CH4、H、CO2的组成，气体的热值及其变化。结果显示：150～260℃区间，不凝性气体的主要成分为CO2，其次为CO；260～490℃区间，CO2相对体积分数明显下降，而CH4明显上升，最高达到了26%，最终H2相对体积分数也达到了12%。得到的可燃气体的热值基本在6 281 kJ/m3以上，平均热值也达到 8 374 kJ/m3以上，是一种具有较高热值的清洁能源。干馏可同时得到干馏杉木精油、木醋液、焦油、木炭及不凝性可燃气，产率分别为9%、33.5%、5.5%、32.9%、15%，杉木根原料全部转化成了产品，无废弃，无排放，产品的总转化率达到了90%以上，实现了资源的综合利用，绿色环保。Abstract: The dry-distilled essential oil, wood vinegar, wood tar, charcoal and combustible gases were obtained from fir root by retorting. The release of non-condensable flammable gas in different temperature ranges and the composition of CO, CH4, H2 and CO2 were studied. Results showed that CO2 was the main ingredients of non-condensable gas between 150-260℃, followed by CO; CO2 content decreased significantly between 260-490℃; CH4 levels increased significantly up to 26%; the final volume fraction of H2 reached 12%; clean energy source with high thermal value mounted up to 6281 kJ/m3 and the average thermal value more than 8 374 kJ/m3. The Carbonization essential oil, wood vinegar, wood tar, charcoal and combustible gases were obtained with the yield of 9%, 33.5%, 5.5%, 32.9% and 15% respectively. All of the fir roots were converted into products with the total conversion rate more than 90% without waste. The method proposed in this paper realizes the comprehensive utilization of resources and green environmental protection.
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Keywords:
- carbonization /
- pyrolysis /
- carbondioxide /
- fir root /
- combustible gas
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