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›› 2014, Vol. 14 ›› Issue (6): 989-993.

• 过程与工艺 • 上一篇    下一篇

碳粉在O2-CO2气氛下的燃烧行为

张昭亮 胡晓军 严红燕 朱荣 周国治   

  1. 北京科技大学钢铁冶金新技术国家重点实验室 北京科技大学理化系 北京科技大学钢铁冶金新技术国家重点实验室 北京科技大学冶金与生态工程学院 上海大学材料学院
  • 收稿日期:2014-12-26 修回日期:1900-01-01 出版日期:2014-12-20 发布日期:2014-12-20
  • 通讯作者: 胡晓军

Combustion Behavior of Carbon Powder in O2-CO2 Mixture

ZHANG Zhao-liang YAN Hong-yan ZHU Rong ZHOU Guo-zhi   

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing Metallurgical and Ecological Engineering School, University of Science and Technology Beijing College of Materials Science and Engineering, Shanghai University
  • Received:2014-12-26 Revised:1900-01-01 Online:2014-12-20 Published:2014-12-20

摘要: 采用综合热分析技术研究了碳粉在不同O2-CO2气氛下的燃烧行为. 结果表明,碳粉在升温燃烧过程中,随CO2浓度增加,TG和DTG曲线向高温区偏移,着火点温度和燃尽温度均呈上升趋势,较高温度才能满足碳粉与CO2反应的条件. 1100℃恒温条件下,TG, DTG和DTA曲线均随CO2浓度的增加向高温区偏移,CO2浓度高于20%时,TG曲线出现平台,相对应的DTG曲线出现波谷,DTA曲线出现波峰,且CO2浓度越高,平台出现得越早. 随CO2浓度的增加明显降低反应产生的热量. CO2含量小于80%时,CO2基本不参与反应,实际的热效应仅与O2含量有关,且符合平方根关系.

关键词: O2-CO2混合气体, 燃烧, 动力学, 着火点温度, 燃尽温度, 热效应

Abstract: The combustion behavior of carbon powder in O2-CO2 mixture was experimentally studied by TG-DTA technique. The results showed that in the non-isothermal combustion process of carbon powder, TG and DTG curves moved to high temperature zone, and the ignition and burnout temperatures increased with increasing of CO2 content. In the isothermal combustion process at 1100℃, TG, DTG and DTA curves also moved to high temperature zone with increasing of CO2 content. When CO2 content is higher than 20%, TG curve showed a platform, and correspondingly DTG and DTA curves appeared a crest and a peak, respectively. Moreover, the higher the CO2 content was, the sooner the platform appeared. The increase of CO2 content obviously reduced the combustion heat. When the CO2 content was less than 80%, CO2 did not participate in the reaction with carbon apparently, the actual thermal effect was associated with O2 content only, being in accordance with the square root relationship.

Key words: O2-CO2 mixture, combustion, kinetics, ignition temperature, burnout temperature, thermal effect

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