生物油/乙醇混合燃料燃烧性能研究

张栋; 朱锡锋

生物油/乙醇混合燃料燃烧性能研究

张栋,
朱锡锋

中国科学技术大学安徽省生物质洁净能源重点实验室, 安徽合肥 230026

基金项目: 国家科技支撑计划 (2011BAD22B07); 国家高技术研究发展计划(863计划, 2012AA051803); 中国科学院知识创新工程方向性项目 (KGCX2-YW-330)。

详细信息

通讯作者:
朱锡锋: Tel: 0551-3600040; E-mail: xfzhu@ustc.edu.cn。

中图分类号: TK6
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出版历程
- 收稿日期: 2011-04-17
- 修回日期: 2011-06-29
- 刊出日期: 2012-02-29

Study on combustion characteristics of bio-oil/ethanol blends

Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China

摘要

摘要: 在空气气氛下采用热失重技术研究生物油及其与乙醇混合燃料的燃烧性能,利用Achar微分法和Coats-Redfern积分法结合的方式进行动力学分析,并对热解焦炭的物化特性进行了测量。结果表明,生物油及其与乙醇混合燃料的燃烧可分为三个阶段,即轻组分挥发、重组分裂解和焦炭燃烧;随着升温速率的升高,生物油的挥发性能和燃烧性能提高;随着乙醇质量分数的增加,挥发段和焦炭燃烧段的活化能都呈先减小后增大的趋势;混合燃料中乙醇质量分数不宜超过26%,否则其燃烧段的活化能增大,且热解焦炭所含有机官能团强度变弱,燃烧性能反而变差。
- 生物油/乙醇混合燃料 /
- 热重分析 /
- 燃烧特性 /
- 动力学分析
Abstract: Thermal weight loss curves of bio-oil/ethanol blends were determined by TG-DTA method in the oxygen atmosphere, kinetic parameters were calculated by both the Achar differential method and the Coats-Redfern integral method, and the properties of blend fuel pyrolysis chars were also tested. The thermogravimetric cures of bio-oil and its blends with ethanol can be divided into three steps: volatilization, secondary char formation, and char combustion. With the increasing of heating rate, the volatility and char combustibility of bio-oil turned better. With the increasing of ethanol content in the blend fuels, the active energies of volatilization and char combustion were both decreased first and then increased. The mass fraction of ethanol should not exceed 26%, otherwise the active energy of char combustion increased and the contained organic function groups in char decreased, which indicated higher stability and lower combustibility of the char.
- bio-oil/ethanol blends /
- thermogravimetry /
- combustion properties /
- kinetics analysis

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