| 挥发分-半焦交互反应对生物质热解半焦特性的影响 |
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| 引用本文： | 冯冬冬,赵义军,刘鹏,张宇,张海楠,孙绍增. 挥发分-半焦交互反应对生物质热解半焦特性的影响[J]. 化工学报, 2016, 67(11): 4787-4794. DOI: 10.11949/j.issn.0438-1157.20160730 |
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| 作者姓名： | 冯冬冬 赵义军 刘鹏 张宇 张海楠 孙绍增 |
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| 作者单位： | 哈尔滨工业大学能源科学与工程学院, 黑龙江 哈尔滨 150001 |
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| 基金项目： | 国家自然科学基金项目（51206037）；国家自然科学基金创新群体-热传导与流动控制（51421063）。 |
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| 摘 要： | 挥发分-半焦交互作用是生物质热化学利用过程普遍存在的现象。为了解析交互反应对生物质热解半焦特性的影响，利用一阶固定床/流化床反应器及快速热裂解仪进行实验。针对挥发分-半焦交互反应，对碱金属和碱土金属（AAEM）元素的析出特性展开了研究，同时分析了交互反应对生物质热解半焦反应活性的影响。结果表明在700~900℃范围内，交互反应的存在使得热解成焦率较无交互反应下有所提高。热解过程中交互反应导致了单价K元素析出量增加，对二价Ca/Mg元素的析出影响较小。挥发分-半焦交互反应的存在使得半焦反应活性对温度的敏感度降低，随温度的升高其反应速率的下降幅度变缓。
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| 关 键 词： | 挥发分-半焦交互反应 生物质 热解 半焦 AAEM 反应活性 |
| 收稿时间： | 2016-05-27 |
| 修稿时间： | 2016-07-13 |
Effect of volatile-char interaction on pyrolysis biochar characteristics |
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| FENG Dongdong,ZHAO Yijun,LIU Peng,ZHANG Yu,ZHANG Hainan,SUN Shaozeng. Effect of volatile-char interaction on pyrolysis biochar characteristics[J]. Journal of Chemical Industry and Engineering(China), 2016, 67(11): 4787-4794. DOI: 10.11949/j.issn.0438-1157.20160730 |
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| Authors: | FENG Dongdong ZHAO Yijun LIU Peng ZHANG Yu ZHANG Hainan SUN Shaozeng |
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| Affiliation: | School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China |
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| Abstract: | The volatile-char interaction is a common phenomenon during the biomass pyrolysis. In order to study the effect of volatile-char interaction on pyrolysis biochar, the one-stage fluided bed/fixed bed reactor and Py were used in the experiment. The AAEM analysis was carried out with/without the volatile-char interaction. The effect of volatile-char interaction on pyrolysis biochar reactivity was analyzed. The results showed that with increasing pyrolysis temperature from 700℃ to 900℃, the pyrolysis char yield was increased due to the volatile-char interaction as compared with the weak interaction. In the process of pyrolysis, the increase of precipitation of K was caused by the volatile-char interaction. The migration and precipitation characteristics of Ca/Mg elements did not have a significant change. The biochar sensitivity to temperature was reduced by volatile-char interaction and the reactivity of biochar was decreased with increasing temperature. |
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| Keywords: | volatile-char interaction biomass pyrolysis char AAEM reactivity |
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