O_2/CO_2气氛下烟煤燃烧过程中S的析出特性  

Investigation on Sulfur Release From Bituminous Coal Combustion in O_2/CO_2 Atmosphere

作　　者：段伦博[1] 赵长遂[1] 李英杰[1] 卢骏营[1] 周骛[1] 陈晓平[1] 

机构地区：[1]东南大学能源与环境学院,江苏省南京市210096

出　　处：《中国电机工程学报》2008年第35期9-13,共5页Proceedings of the CSEE

基　　金：国家重点基础研究发展规划基金项目(2006CB705806)~~

摘　　要：通过X射线光电子能谱仪对徐州烟煤中S的存在形态进行分析,在常压热重分析仪上进行了烟煤在模拟空气和不同O2/CO2浓度下的燃烧试验,并通过傅里叶变换红外光谱仪对其中S的释放进行测量。结果发现,在模拟空气气氛和30%O2/70%CO2气氛下,煤燃烧过程中SO2的排放浓度随时间呈双峰析出;在21%O2/79%CO2气氛下,SO2浓度随时间变化出现3个峰值;在高O2浓度下(不小于40%)时,SO2随时间呈单峰析出。在空气气氛下,烟煤燃烧的SO2总生成量比在同等O2浓度的O2/CO2气氛下小;随着O2浓度的提高,O2/CO2气氛下烟煤燃烧的SO2总生成量先升高后减小。The X-ray photoelectron spectroscopy （XPS） was used to study sulfur functionality in the bituminous coal and a thermogravirnetric analyzer （TGA） was used to evaluate its combustion behavior in O2/N2 and O2/CO2 atmosphere by changing 02 fraction in the mixture. The Fourier Transform Infrared （FTIR） spectrometer was employed to detect the gas evolved from bituminous coal during the combustion process. Results show that in 21%O2/79%N2 or 30%O2/70%CO2 atmosphere, there are two SO2 absorbance peaks appearing; in 21%O2/79%CO2 atmosphere, a third peak appears; in higher O2 concentration （no less than 40%） atmosphere, there is only one peak left. The integrals of the SO2 absorbance unit show that total SO2 emission from coal combustion in air is less than that in O2/CO2 mixture with the same O2 fraction, and SO2 emission in O2/CO2 mixture goes up first and declines then as O2 concentration increases.

关 键 词：O2/CO2燃烧 O2浓度 S析出 X射线光电子能谱 热重红外联用 

分 类 号：TQ534[化学工程—煤化学工程]