Study on the gas evolution and char structural change during pyrolysis of cotton stalk
Study on the gas evolution and char structural change during pyrolysis of cotton stalk
复制标题
棉秆热解过程气体逸出及炭结构变化研究
DOI：
10.1016/j.jaap.2012.05.012
复制
发表时间：
2012-09-01
影响因子：
6
通讯作者：
An, Senmeng
中科院分区：
文献类型：
--
作者：
Fu, Peng;Hu, Song;An, Senmeng
研究了棉秆热解过程中的气体释放特性和炭结构演化。通过热解-傅里叶变换红外光谱（FTIR）/热导检测（TCD）分析（Py-FTIR/TCD）检查挥发性产物的演化特征。通过FTIR和N-2物理吸附技术研究了炭的化学结构和物理特性。给出了主要挥发性产物的演化特征。 CO2 的释放比 CO 早约 26°C。CH4 的释放涵盖了 300-600°C 的更宽温度范围，最高温度为 394°C。炭中羟基、脂肪族 C-H 和烯属 C = C 键的数量在 250°C 以上显着减少。芳构化过程在大约 350°C 开始，并持续到更高的温度，使炭中富含缩合芳香族化合物。环系统。 BET 表面积随着温度的升高而不断增加，在 500 ℃ 时达到最大值 4.68 m(2)/g，并在较高温度下减小。微孔体积表现出与表面积相似的行为，而中孔体积和总孔体积始终增加。 (C) 2012 Elsevier B.V. 保留所有权利。
The gas release properties and char structural evolution during the pyrolysis of cotton stalk were investigated. The evolution characteristics of volatile products were examined by pyrolysis-Fourier transform infrared spectroscopy (FTIR)/thermal conductivity detection (TCD) analysis (Py-FTIR/TCD). The char chemical structure and physical characteristics were investigated by means of FTIR and N-2 physisorption techniques. Evolution characteristics of the main volatile products were given. The evolution of CO2 was approximately 26 degrees C earlier than that of CO. CH4 evolution covered over a wider temperature range of 300-600 degrees C, with a maximum at 394 degrees C. The amount of hydroxyl, aliphatic C-H and olefinic C = C bonds in the char decreased significantly above 250 degrees C. The aromatization process started at approximate to 350 degrees C and continued to higher temperatures, leaving the char enriched with condensed aromatic ring systems. The BET surface area increased continually with increasing temperature to reach a maximum value of 4.68 m(2)/g at 500 degrees C and decreased at higher temperatures. The micropore volume showed a similar behavior to the surface area, while the mesopore volume and total pore volume always increased. (C) 2012 Elsevier B.V. All rights reserved.