Pinus massoniana pyrolysis: influence of temperature on yields and product properties
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摘要: 马尾松Pinus massoniana是中国重要的速生人工林树种。采用热化学转化法,可制取生物质燃气、生物质炭和生物油等高品质燃料。采用固定床热解反应器,开展了热解温度(400,500,600和700 ℃)对马尾松慢速热解过程产物产率和基本特性的影响研究。结果表明:随着反应温度的升高,气体产率逐渐增加,炭产率和生物油产率逐渐减少;在700 ℃时,可燃气的最高热值为12.11 MJN-1m-3,气体成分及其体积分数为二氧化碳CO2(24.00%),一氧化碳CO(25.00%),甲烷CH4(15.50%),氢气H2(25.50%)和烃类气体CnHm(2n4)(0.97%);炭的最高低位热值和比表面积分为31.8 MJkg-1和536.13 m2g-1;生物油中乙酸(5.30%),1-羟基-2-丁酮(4.11%),乙酰甲醇(8.46%),苯酚(2.66%)和甲基苯酚(3.87%)的相对含量最高。图3表3参18Abstract: Pinus massoniana, a fast-growing wood species that is plentiful in China, could be converted into high-quality bio-fuel through thermal-chemical conversion technology. The objective of this study was to obtain useful data for effective design and operation of biomass pyrolysis technology fed by P. massoniana. In this study a fixed bed reactor was used to determine the influence of temperature (400, 500, 600, and 700 ℃) on yields and properties of slow pyrolysis products for P. massoniana. The components of bio-gas were analyzed by gas chromatograph (GC), the properties of bio-char were analyzed by the Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) methods, and the components of bio-oil were analyzed by gas chromatograph/mass spectrometry (GC/MS). Results showed that as the pyrolysis temperature increased, the yield of bio-gas increased from 40.00% to 46.50%; whereas, the yields of bio-char and bio-oil decreased from 26.50% to 24.00% and 33.50% to 29.50%, respectively. At 700 ℃, the lower heating value (LHV) of bio-gas reached its maximum value of 12.11 MJN-1m-3 with components of CO2(24.00%), CO(25.00%), CH4(15.50%), H2(25.50%), and CnHm (2 n4)(0.97%); also the maximum values for LHV (31.8 MJkg-1) and specific surface area (536.13 m2g-1) were attained. The main components in the bio-oil were acetic acid (5.30%), 1-hydroxy-2-butanone (4.10%), hydroxy-acetone (8.50%), phenol (2.70%), and methylphenol (3.90%) which could be important chemicals source by refining .[Ch, 3 fig. 3 tab. 18 ref.]
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Key words:
- wood science and technology /
- Pinus massoniana /
- slow pyrolysis /
- fixed bed /
- bio-gas /
- bio-char /
- bio-oil
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2016.01.015

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