利用热分析法研究CO2对褐煤富氧燃烧特性的影响Thermogravimetry based analysis on the influence of CO2 on oxy-fuel combustion characteristics of lignite
胡昕,周志军,王智化,游卓,周俊虎,岑可法
摘要(Abstract):
利用热分析法研究了准东褐煤和伊敏褐煤在21%O2浓度的O2/N2和O2/CO2气氛下的燃烧反应过程,得到其在不同气氛下的着火温度、燃尽温度、最大反应速率和最大反应速率温度等特征参数,同时计算各反应过程的综合燃烧特性指数,并基于Coats-Redfern法得出了各反应的动力学参数。试验结果表明:O2/CO2气氛下两煤种的燃烧反应均受到抑制,反应速率降低,反应时间延长;CO2对煤化程度更低的褐煤燃烧反应抑制作用更为明显。综合燃烧特性指数和动力学参数的计算结果与试验结果相符。
关键词(KeyWords): 褐煤;O2/N2;O2/CO2;燃烧特性;热分析;反应动力学
基金项目(Foundation):
作者(Author): 胡昕,周志军,王智化,游卓,周俊虎,岑可法
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