摘要
采用热重分析,结合机理分析的方法,探讨了不同催化剂对垃圾焚烧过程中着火性能和燃尽性能的影响。结果表明,催化剂对垃圾着火性能的提高主要是催化剂促进了垃圾中挥发性有机物的释放,使着火点提前;催化剂对垃圾燃尽性能的提高,主要作用机理是催化剂充当氧的载体,促进氧转移。提出了表征着火性能和燃尽性能的两个物理参数,并根据两个参数对催化剂进行排序和比较。催化剂影响着火性能大小进行排序:K2CO3 >MnO2 >Na2CO3 >CuO>MgO>TiO2 >Al2O3 >Fe2O3 >BaCO3 >CaO;催化剂影响垃圾燃尽性能大小排序:Na2CO3 >MgO>MnO2 >K2CO3 >BaCO3 >CaO>Al2O3 >CuO>Fe2O3 >TiO2。
By means of thermogravimertric analysis (TGA), the influences of different catalysts on the ignition and burn off of municipal solid waste (MSW) combustion were examined in this paper. It shows that the catalysis of the catalysts to the MSW combustion is embodied in the enhancement of the emission of volatile matters (VM) from MSW, which reduces the ignition temperature. Another role of the catalysts to the combustion of MSW may be a carrier of oxygen that impromotes the oxygen transfer to the char of MSW. Two indexes have been put forward to describe the character of ignition and burnout of MSW. One is the temperature when the weight loss of MSW is 5%, the other is the burnout extent when the temperature is 850°C. By comparing the two indexes, different influences of catalysts to the ignition and burnout of MSW have been obtained. The relative active sequence of catalysts to the ignition of MSW is described as follows: K2CO3 > MnO2 > Na2CO3 > CuO > MgO > TiO2 > Al2O3 > Fe2O3 > BaCO3 > CaO; The relative active sequence of catalysts to burnout of MSW is described as follows: Na2CO3 > MgO > MnO2 > K2CO3 > BaCO3 > CaO > Al2O3 > CuO > Fe2O3 > TiO2.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2005年第2期189-193,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(20347002)
南开大学校创新基金。~~
