摘要
采用热重法(TG)考察了六枝(LZ)、合肥(ZY)和吴家坪(WJP)原煤、脱灰煤及其脱黄铁矿煤的燃烧性能,并对其燃烧性能进行了动力学研究.研究表明:LZ,ZY和WJP脱灰煤的着火温度和燃烧峰温都较其原煤低,其燃烧特性指数较其原煤高,这是由于脱灰煤的燃烧活化能E较其原煤低的缘故.ZY和WJP脱黄铁矿煤的燃烧特性指数S与其脱灰煤相比基本没发生变化,这是由于脱黄铁矿煤的燃烧活化能E和指前因子A都较其脱灰煤大大增加,是二者相互影响的结果.对煤的燃烧行为进行动力学研究发现:LZ,ZY和WJP原煤、脱灰煤及其脱黄铁矿煤在燃烧区间的某一温度段满足一级反应模型,且线性相关性较好,相关系数大都在0.98以上.
In this study, the combustion behavior of coals and their treated coals, Liuzhi （LZ）, Zunyi （ZY） and Wujiaping （WJP） raw coals, their deashed coals and depyrited coals, was investigated by a thermogravimetric analyzer （TGA92）, and the kinetic model about coal combus- tion was also studied. For the deashed coals, the temperatures of kindling point and combustion peak all decrease compared to their raw coals, which may be related to lower activation energy in the deashed coals. For the ZY and WJP depytied coals, the combustion characteristic index is al- most same to that of their deashed coals, the reason should be that the activation energy and pre- exponential factor, which co-affect the temperature of kindling point, combustion peak, the average and maximum ratio of coal combustion, all increased intensely in those depyrited coals. It is found that the kinetic model of coals combustion is first order reaction in a definition region of whole combustion range, and the most of correlative linearity factors is higher than 0.98.
出处
《煤炭转化》
CAS
CSCD
北大核心
2011年第2期8-12,共5页
Coal Conversion
基金
国家自然科学基金青年基金资助项目(21006042)
内蒙古自然科学基金资助项目(2009BS0606)
内蒙古大学大学生创新基金资助项目
关键词
煤
燃烧特性
动力学模型
coal, combustion characteristic, kinetic model
