【摘要】 为研究煤粉热解各组分的析出特性,在TGA-FTIR联用实验台上对宝日希勒褐煤和包头烟煤进行了热解实验研究,对CH4、CO2、CO和HCN进行了测量,并对采用分布活化能模型(DAEM)模拟总体挥发分和各组分的析出进行了分析。结果表明,CH4的析出浓度曲线呈对称的单峰分布,而CO、CO2和HCN的析出浓度曲线不规则,DAEM模型可适用于整体挥发分的模拟,也可对CH4的析出进行较准确的模拟和预测,但不适用于CO、CO2和HCN的模拟。CH4、CO2、CO和HCN析出温度主要由各自官能团分解键能决定。宝日希勒褐煤总体挥发分含量高于包头褐煤,然而挥发分中CH4和HCN的含量低于包头烟煤。更多还原

【Abstract】 To study the precipitation characteristics of various pulverized-coal pyrolyzed constituents,a pyrolysis experimental study has been conducted of Baorixile-origin lignite and Baotou-origin bitumite on a TGA-FTIR (Thermogravimetric Analyzer-Fourier Transform Infrared Spectrum) dual-purpose test rig.CH4,CO,CO2 and HCN were measured along with an analysis of the precipitation of total volatile content and various constituents being simulated by using DAEM (Distributed Activation Energy Model).The results indicate that the curves of CH4 precipitation concentration assume a symmetric single-peak distribution and those of CO,CO2 and HCN precipitation concentration are irregular.The DAEM is applicable for the simulation of integrated volatile contents and can also perform a relatively accurate simulation and prediction of CH4 precipitation,but not suitable for the simulation of CO,CO2 and HCN.The precipitation temperature of CH4,CO,CO2 and HCN is mainly determined by various functional group’s decomposition bond energy.Baorixile-origin lignite has a total volatile content higher than that of Baotou-origin lignite,but the content of CH4 and HCN in the volatile matter,however,is lower than that of Baotou-origin bitumite.更多还原