郑泉兴, 刘秀彩, 吴添文, 陈辉, 黄朝章, 许寒春, 蓝洪桥, 马鹏飞, 于德德, 谢卫, 伊晓东. 不同植物纤维的热解和燃烧特性研究[J]. 燃料化学学报（中英文）, 2022, 50(6): 747-756. DOI: 10.19906/j.cnki.JFCT.2022003
引用本文: 郑泉兴, 刘秀彩, 吴添文, 陈辉, 黄朝章, 许寒春, 蓝洪桥, 马鹏飞, 于德德, 谢卫, 伊晓东. 不同植物纤维的热解和燃烧特性研究[J]. 燃料化学学报（中英文）, 2022, 50(6): 747-756. DOI: 10.19906/j.cnki.JFCT.2022003
shu
ZHENG Quan-xing, LIU Xiu-cai, WU Tian-wen, CHEN Hui, HUANG Chao-zhang, XU Han-chun, LAN Hong-qiao, MA Peng-fei, YU De-de, XIE Wei, YI Xiao-dong. Study on pyrolysis and combustion characteristics of different plant fibers[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 747-756. DOI: 10.19906/j.cnki.JFCT.2022003
Citation: ZHENG Quan-xing, LIU Xiu-cai, WU Tian-wen, CHEN Hui, HUANG Chao-zhang, XU Han-chun, LAN Hong-qiao, MA Peng-fei, YU De-de, XIE Wei, YI Xiao-dong. Study on pyrolysis and combustion characteristics of different plant fibers[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 747-756. DOI: 10.19906/j.cnki.JFCT.2022003
shu

不同植物纤维的热解和燃烧特性研究

Study on pyrolysis and combustion characteristics of different plant fibers

    摘要
  • 摘要: 本研究采用不等温热重法研究六种纤维（针叶、阔叶、竹、亚麻、草和棉）在N2和空气气氛下的热解和燃烧特性，并采用Friedman法对其进行动力学分析。结果表明，纤维不同的热解和燃烧特性参数与其自身结构组成有关。纤维在热解和燃烧过程中，其挥发分析出温度Ts、终止温度Th、DTG峰温Tmax、固定碳燃烧峰温、最大质量损失速率、热解指数P和燃烧指数S均随着升温速率的增加而增加；在N2气氛下，亚麻纤维Tmax最大，竹纤维Tmax最小，棉纤维的Ts最大，草纤维的最大热解质量损失速率−(dm/dt)max、热解指数P和燃烧指数S均最小；在转化率为0.05−0.85条件下，阔叶纤维平均表观活化能最小(173.3 kJ/mol)，竹纤的最大(201.10 kJ/mol)。在空气气氛下，所有纤维的热解过程的Tmax均低于N2条件下，在转化率为0.05−0.65时，纤维在空气中热解的表观活化能Eα低于其在N2条件下的表观活化能。

     

    Abstract: In order to study the pyrolysis and combustion characteristics of different fibers, the kinetics of six kinds of plant fibers (coniferous, broadleaf, bamboo, flax, grass and cotton) in N2 and air atmosphere were studied by non-isothermal thermogravimetric (TG) method using Friedman method. The results showed that the fibers had different pyrolysis and combustion characteristic parameters, which were related to their own structural compositions. In the process of pyrolysis and combustion of fibers, the initial volatilization temperature (Ts), terminal decomposition temperature (Th), DTG peak temperature (Tmax), fixed carbon combustion peak temperature, maximum mass loss rate, pyrolysis character index (P) and combustion character index (S) increased with the increase of heating rates; In N2 atmosphere, the flax fiber Tmax and bamboo fiber Tmax were shown to be the highest and lowest among all fibers, respectively, and Ts of cotton fiber was the largest; Grass fiber had the smallest maximum pyrolysis mass loss rate (−(dm/dt)max), pyrolysis index (P), and combustion index (S); Between the conversion of 0.05−0.85, the average apparent activation energies (E) of broadleaf fiber and bamboo fiber were the smallest (173.30 kJ/mol) and highest (201.10 kJ/mol), respectively. In air atmosphere, Tmax of all fibers in the pyrolysis process was lower than that in N2. The apparent activation energy (Eα) of fiber pyrolysis in air atmosphere was shown to be lower than that in N2 when the conversion was between 5% and 65%.

     

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