方嘉，蒋渊，李健，秦源，李鉴松，孟忠伟.热老化对炭黑颗粒氧化特性影响的试验研究[J].内燃机工程,2018,39(6):52-58.
热老化对炭黑颗粒氧化特性影响的试验研究
Experimental Investigation on the Influence of Thermal Aging on Oxidation Characteristics of Carbon Black Particles
DOI：10.13949/j.cnki.nrjgc.2018.06.007
关键词:热老化  氧化特性  活化能  炭黑
Key Words:thermal aging  oxidation performance  activation energy  carbon black
基金项目:国家自然科学基金项目(51676167)；四川省科技厅青年科技创新研究团队项目(2017TD0026);四川省教育厅科研创新团队项目(17TD0035);西华大学校重点科研项目（Z17101）
作者单位
方嘉，蒋渊，李健，秦源，李鉴松，孟忠伟 1.西华大学 汽车与交通学院，成都 610039；2.西华大学 流体及动力机械教育部重点试验室，成都 610039 
摘要点击次数: 2390
全文下载次数: 1481
摘要:基于热重分析仪，首先开展不同热老化温度、时间、氧气质量分数的热重试验，并分别采用微分法（Achar Brindley Sharp Wendworth，ABSW）和阿仑尼乌斯法（Arrhenius）进行氧化动力学分析。结果表明：当老化温度区间在325~400℃时，随着老化温度的增加，活化能从181kJ/mol降低到170kJ/mol。随着老化时间的增加，颗粒的活化能从180kJ/mol降低到172kJ/mol之后在172kJ/mol保持不变。当老化氧气质量分数低于5%时，随着老化氧气质量分数的增加，活化能逐渐升高到188kJ/mol；而高于5%时，活化能从188kJ/mol降低170kJ/mol。此外，基于高分辨透射电镜对炭黑颗粒的微观结构分析发现，随着老化温度、时间及氧气质量分数的降低，基本碳粒的壳结构更加趋于有序化，石墨化程度相对较高，氧化活性较低。
Abstract:The thermogravimetric experiments of different thermal aging temperatures, times and oxygen concentrations were carried out by a thermogravimetric analyzer, and then the oxidation kinetics of carbon black particles was analyzed by the differential(ABSW) and Arrhenius methods, respectively. Results show that when the aging temperature is within the range of 325℃ to 400℃, the activation energy of carbon black particles decreases from 181kJ/mol to 170kJ/mol with the thermal temperature increases. As the aging time increases, the activation energy of the particles decreases from 180kJ/mol to 172kJ/mol and remains unchanged. When the aged oxygen concentration is less than 5%, the activation energy gradually increases to 188kJ/mol with the aged oxygen concentration increases, and when the aged oxygen concentration is higher than 5%, the activation energy decreases from 188kJ/mol to 170kJ/mol. In addition, based on the analysis of microstructure of carbon black particles by a high-resolution transmission electron microscopy, it is found that as the aging temperature, time and oxygen concentration decrease, the shell structure of basic carbon particulates tends to be more ordered, which leads to a higher degree of graphitization and lower oxidation activity.
查看全文  HTML   查看/发表评论