【作者】 郑照强； 夏洪应； 张利波； 彭金辉； 刘秉国；

【Author】 Zheng Zhao-qiang~(1,2,3)),Xia Hong-ying~(1,2,3)),Zhang Li-bo~(1,2,3)),Peng Jin-hui~(1,2,3)),Liu Binguo~(1,2,3)) 1) Yunnan Provincial Key Laboratory of Intensification Metallurgy,Kunming 650093,Yunnan,China 2) Key Laboratory of Unconventional Metallurgy,Ministry of Education,Kunming University of Science and Technology,Kunming,Yunnan 650093,China 3) Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650093,China

【机构】 云南省特种冶金重点实验室； 非常规冶金教育部重点实室； 昆明理工大学冶金与能源工程学院；

【摘要】 随着冶金行业的发展,活性炭在冶金环保行业的作用日益凸显。利用热重分析技术在高纯N₂条件下,在295-823K范围内对磷酸/烟杆制备活性炭的炭化过程进行了非等温热解分析。研究了不同升温速率（5、15和30K/min）对热解过程的影响,分析热解机理。结果表明,磷酸/烟杆非等温热解过程可分为脱水、炭化及炭结构有序化三个阶段,其中炭化阶段分解出大量挥发物造成大量失重。采用Coats-Redfern模型对实验数据进行处理,得出了磷酸/烟杆的热解表观活化能和指前因子,发现热解的主要阶段可由2.5级反应过程描述,动力学参数存在补偿效应。更多还原

【Abstract】 The role of activated carbon in the metallurgy environmental protection industry is increasingly highlighted with the development of metallurgical industry.The non-isothermal kinetics thermal degradation of H3PO4/tobacco stems was carried out in high pure N₂ atmosphere from 295 to 823K.The influence of different heating rates（5、15 and 30K/min）on the pyrolysis was investigated,the mechanism of the thermal degradation was discussed.The results indicate that the non-isothermal thermal degradation process of H₃PO₄/tobacco stems has three distinct stage:dehydration,carbonization and the ordering of carbon structure. The second stage plays an important role in the whole process as a mount of released volatile caused the distinct weight loss. Coats-Redfern model was used to determine the kinetic parameters for H₃PO₄/tobacco stems,including frequency factors and activation energies.The main pyrolytic stages can be described by 2.5 order global mode.The results indicated that the kinetic parameters exhibit compensation effects.更多还原