果木枝水热炭组成及燃烧特性  

Characterization and Kinetic Analysis of Hydrothermal Charcoal Fuel from Fruitwood Branches

作　　者：汪远 WANG Yuan(School of Energy and Power,Shenyang Institute of Engineering,Shenyang 110136,Liaoning Province)

机构地区：[1]沈阳工程学院能源与动力学院,辽宁沈阳110136

出　　处：《沈阳工程学院学报（自然科学版）》2024年第4期37-42,共6页Journal of Shenyang Institute of Engineering:Natural Science

基　　金：辽宁省高等学校基本科研项目(LJKMZ20221715)。

摘　　要：以果木枝为原料,利用水热碳化技术制备水热炭,研究不同反应强度下水热炭的组成及燃烧特性并进行动力学分析。结果表明:随反应强度的增加,水热炭的挥发分和H、O元素的含量均降低,固定碳和C元素的含量升高;在反应强度参数lgR_0为6.49时,水热炭的O、C原子比和H、C原子比与褐煤相似,高位热值达到最高,为21.02 MJ/kg;水热碳化提高了水热炭的着火温度和燃尽温度,当lgR_0为4.90时,具有最高的综合燃烧指数和燃烧稳定性指数;采用一级反应动力学模型进行动力学分析,所得结果可靠,相关系数R~2均大于0.93,水热炭各阶段活化能随着反应强度的增加均呈先增后减的趋势。Hydrothermal carbon is prepared by hydrothermal carbonization technology using fruitwood branches as raw materials,and the composition and combustion characteristics of hydrothermal carbon under different reaction intensities are investigated and analyzed kinetically.The results show that with the increase of reaction intensity,the content of volatile matter and H and O elements of hydrothermal carbon decrease,and the content of fixed carbon and C elements increase.At the reaction intensity parameter lgR0 of 6.49,the ratio of oxygen to carbon atoms and hydrogen to carbon atoms of hydrothermal carbon is similar to that of lignite,and the high-level calorific value reaches the highest 21.02 MJ/kg.Hydrothermal carbonization increases the ignition temperature and burnout temperature of hydrothermal carbon,and has the highest combined combustion index and combustion stability index when lgR0is 4.90.The results of kinetic analysis using the first order reaction kinetic model are reliable,and the correlation coefficients R2are all greater than 0.93,and the activation energies of hydrothermal carbon at each stage show a tendency of increasing and then decreasing with the increase of reaction intensity.

关 键 词：生物质 水热碳化 水热炭 燃烧 动力学分析 

分 类 号：TK16[动力工程及工程热物理—热能工程]