CAJ | 학술논문

利用热分析法研究了过氧化钙（CaO2）的分解及其对煤化程度不同的煤粉燃烧效率的影响,分析了CaO2的助燃催化作用机制。结果表明,CaO2分解温度区间与煤粉的挥发分析出温度区间较为吻合,CaO2分解释放的氧气可促进热解气体的氧化反应和固定碳的燃烧反应,催化煤的燃烧释热。动力学计算表明,CaO2可降低燃烧各阶段反应活化能,提高燃烧过程的反应速率。比较分析发现,煤的热分解过程与CaO2的分解过程的协同程度和煤的着火方式对此助燃催化有重要的影响。
이용열분석법연구료과양화개（CaO2）적분해급기대매화정도불동적매분연소효솔적영향,분석료CaO2적조연최화작용궤제。결과표명,CaO2분해온도구간여매분적휘발분석출온도구간교위문합,CaO2분해석방적양기가촉진열해기체적양화반응화고정탄적연소반응,최화매적연소석열。동역학계산표명,CaO2가강저연소각계단반응활화능,제고연소과정적반응속솔。비교분석발현,매적열분해과정여CaO2적분해과정적협동정도화매적착화방식대차조연최화유중요적영향。
The decomposition reaction of CaO2 and its catalytic effect on combustion efficiency of different ranks of pulverized coal were investigated by employing the thermal analysis,and the mechanism of catalytic combustion was proposed.The results indicated that the temperature region of CaO2 decomposition reaction approached coal pyrolysis,and the active oxygen prepared by the decomposition of CaO2 can improve oxidation reaction of pyrolysis gas and combustion reaction of fixed carbon,which resulted in enhancement of heat release of three pulverized coals.The kinetic study was carried out and the results were presented.Activation energy of samples will decrease with CaO2 addition.By analyzing the results,the synergy between the decomposition temperature of CaO2 and the pyrolysis temperature,as well as the ignition mode,are very important to the catalytic effect of coal samples.