The effects of char and potassium on the fast pyrolysis behaviors of biomass in an infrared-heating condition
The effects of char and potassium on the fast pyrolysis behaviors of biomass in an infrared-heating condition
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红外加热条件下木炭和钾对生物质快速热解行为的影响
DOI：
10.1016/j.energy.2020.119065
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发表时间：
2021
期刊：
影响因子：
9
通讯作者：
Hong Yao
中科院分区：
文献类型：
--
作者：
Haodong Zhu;Baojun Yi;Hongyun Hu;Qizhou Fan;Hao Wang;Hong Yao
在生物质太阳能热解过程中，由于受热面积和堆积效应的影响，生物质的换热受到抑制。因此，生物质与半焦的共热解反应行为以及生物质在共热解状态下的二次热解反应是值得探讨的问题。研究了在不同升温速率(5°C/S、20°C/S、100°C/S)和不同热解温度(350°C、425°C、500°C)下，焦炭和钾对样品充分混合挤压快速热解产物分布的影响。结果表明，较高的温度有利于挥发分的释放，较高的升温速率有利于生物油分解为气态产物。较高的升温速率在一定程度上促进了O元素的释放和C元素在生物炭中的积累。焦炭促进了二次热解反应，进一步分解了小分子酸，并通过脱甲基化和脱甲氧基反应将愈创木酚基结构转化为简单的酚类和CH4。钾的影响主要集中在提高生物质热解活性，促进生物油在低温下转化为气体(尤其是CO2)和愈创木去甲基化反应。
During the solar pyrolysis of biomass, the heat transfer of biomass is restrained due to uncontrolled heating area and accumulation effect. So the co-pyrolysis reaction behaviors of biomass and char, and the secondary pyrolysis reactions of biomass under co-pyrolysis situation are worth exploring. The effects of char and potassium on fast pyrolysis products distribution by fully mixing and extruding sample materials under various heating rates (5 °C/s, 20 °C/s, 100 °C/s) and pyrolysis temperature (350 °C, 425 °C, 500 °C) were discussed. The results showed that high temperature was favorable to the release of volatiles, and higher heating rate promoted decomposition of bio-oils into gaseous products. Higher heating rate contributed to the release of O element and the accumulation of C element in bio-char to some extent. The char enhanced the secondary pyrolysis reaction resulting further decomposition of small molecular acids and the conversion of guaiacyl-contained structure into simple phenols and CH4by demethylation and demethoxylation reaction. The influences of potassium were concentrated in increasing the reactivity of biomass pyrolysis, which promoted the conversion of bio-oils into gas (especially CO2) and the demethylation reaction of guaiacyl at low temperature.
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影响因子：
9
作者：
Xiwen Yao;Zhicheng Zhao;Jishuoli Li;Bohan Zhang;Haodong Zhou;Kaili Xu
通讯作者：
Xiwen Yao;Zhicheng Zhao;Jishuoli Li;Bohan Zhang;Haodong Zhou;Kaili Xu
从同一松木中分离出的四种木质素聚合物的热解行为
影响因子：
11.4
作者：
Wang, Shurong;Ru, Bin;Luo, Zhongyang
通讯作者：
Luo, Zhongyang
影响因子：
9
作者：
Kardas, Dariusz;Hercel, Paulina;Wardach-Swiecicka, Izabela
通讯作者：
Wardach-Swiecicka, Izabela
影响因子：
6.7
作者：
K. Zeng;D. Gauthier;J. Soria;G. Mazza;G. Flamant
通讯作者：
K. Zeng;D. Gauthier;J. Soria;G. Mazza;G. Flamant
影响因子：
7.4
作者：
Geng, Wenhua;Kumabe, Yasutaka;Ohki, Akira
通讯作者：
Ohki, Akira