挥发分-半焦交互反应对生物质热解半焦特性的影响

doi:10.11949/j.issn.0438-1157.20160730

化工学报 ›› 2016, Vol. 67 ›› Issue (11): 4787-4794.DOI: 10.11949/j.issn.0438-1157.20160730

挥发分-半焦交互反应对生物质热解半焦特性的影响

冯冬冬, 赵义军, 刘鹏, 张宇, 张海楠, 孙绍增

哈尔滨工业大学能源科学与工程学院, 黑龙江哈尔滨 150001

收稿日期:2016-05-27 修回日期:2016-07-13 出版日期:2016-11-05 发布日期:2016-11-05
通讯作者: 赵义军,zhaoyijun@hit.edu.cn
基金资助:
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）。

Effect of volatile-char interaction on pyrolysis biochar characteristics

FENG Dongdong, ZHAO Yijun, LIU Peng, ZHANG Yu, ZHANG Hainan, SUN Shaozeng

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

Received:2016-05-27 Revised:2016-07-13 Online:2016-11-05 Published:2016-11-05
Supported by:
supported by the National Natural Science Foundation of China (51206037) and the National Natural Science Foundation Innovation Research Group Heat Transfer and Flow Control (51421063).

摘要/Abstract

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。

关键词: 挥发分-半焦交互反应, 生物质, 热解, 半焦, AAEM, 反应活性

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.

Key words: volatile-char interaction, biomass, pyrolysis, char, AAEM, reactivity

中图分类号:

X382.1

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.

FENG Dongdong, ZHAO Yijun, LIU Peng, ZHANG Yu, ZHANG Hainan, SUN Shaozeng. Effect of volatile-char interaction on pyrolysis biochar characteristics[J]. CIESC Journal, 2016, 67(11): 4787-4794.

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挥发分-半焦交互反应对生物质热解半焦特性的影响

Effect of volatile-char interaction on pyrolysis biochar characteristics

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