摘要
用流化床反应器对沥青球进行了氧化不熔化处理,考察了不同温度下沥青球的氧化行为及其后续炭化行为。采用热重分析仪、傅里叶变换红外光谱仪、元素分析仪及扫描显微镜对氧化沥青球和炭化球进行了表征。结果表明:流化床反应器强化了沥青球氧化不熔化的传热和传质过程,在0.21 m/s的临界流态化气速下,以0.5℃/min快速升温至300℃进行沥青球的不熔化处理,得到具有良好表面形貌和球形度的氧化沥青球及其炭化球,极大改善了沥青球制备过程中氧化不熔化的耗时、耗能问题。
The pitch spheres were oxidized at different temperatures in a fluidized bed.The chemical structure and morphology of the oxidized and carbonized pitch spheres samples were investigated by TG,FT-IR,SEM and elemental analysis.The results showed that the fluidized bed reactors has strengthened the heat and mass transfer in oxidative stabilization,and decreased the time and energy consumption of oxidation process.When the oxidation was operated at the critical fluidization velocity of 0.21 m/s and the heating rate of 0.5 ℃/min to 300 ℃,pitch spheres were oxidative stabilization completely,and carbonized pitch spheres with smooth-surfaced morphologies were obtained.
出处
《炭素技术》
CAS
CSCD
2010年第6期5-8,12,共5页
Carbon Techniques
基金
上海市科学技术委员会资助项目(09495801200)
关键词
沥青
氧化不熔化
流化床
Pitch
oxidation stabilization
fluidized bed