富氧气氛下升温速率对煤燃烧及动力学的研究  

STUDY ON THE EFFECT OF HEATING RATE ON COMBUSTION AND KINETICS OF PULVERIZED COAL IN MIXED O_2/CO_2 ATMOSPHERE

作　　者：杨妮[1] 卿山[1] 王华[1] 张爱敏[1] 李文滔[2] 王俊勇[2] 

机构地区：[1]昆明贵金属研究所 [2]昆明理工大学冶金与能源工程学院,省部共建复杂有色金属资源清洁利用国家重点实验室

出　　处：《煤炭转化》2014年第4期50-54,共5页Coal Conversion

基　　金：国家自然科学基金资助项目(51064015)

摘　　要：在同步热分析仪上对小龙潭褐煤进行了不同升温速率(5K/min,10K/min和20K/min)下的O2/CO2燃烧特性实验,确定不同升温速率下煤粉的燃烧特性参数及动力学参数.实验结果表明,随着升温速率的增大,煤粉的TG曲线和DTG曲线均向低温区偏移,煤样的着火温度和燃尽温度升高,燃烧时间延长,可燃性指数和综合燃烧特性指数增大,同时,反应动力学参数随升温速率的变化而不同,频率因子呈上升趋势.The experiment of combustion characteristics of Xiaolongtan lignite was carried out by a simultaneous thermal analyzer. It was at the different heating rate （5 K/min, 10 K/min, 20 K/min） which under the mixed O2/CO2 atmospheres that make the experiment feasible. The combustion parameters and kinetic parameters of the Xiaolongtan lignite were determined based on experimental results. The results showed that the TG and DTG curves of coal would move to lower temperature area, the ignition and combustion temperature would be higher, the burning time would be longer. Both the flammability index and composite combustion characteristic pa- rameters would increase while the heating rate increasing. In addition, the activity energy changed with the variation of heating rate, there was an upward trend of the frequency factor of the Xiaolongtan lignite.

关 键 词：O2/CO2气氛 热重分析 升温速率 燃烧特性 动力学 

分 类 号：TQ534[化学工程—煤化学工程] O643[理学—物理化学]