【摘要】 采用TG/FTIR/MS三联机在线检测CaC₂O₄分解过程中逸出气的红外和质谱信息,并改变试样量及气氛气体的氧浓度进行定性定量分析。发现在惰性气氛下CaC₂O₄的两个分解过程中均存在CO和CO₂共逸出现象。其中与CO共逸出的CO₂,由CO的歧化反应和氧化反应共同贡献;与CO₂共逸出的CO,则是由歧化反应产物C与逸出气CO₂发生碳气化反应而生成。系统内氧气浓度对CO歧化反应和碳气化反应有很大影响,当氧气体积浓度达到38×10-6时,已检测不到这两个反应的存在,此时质谱中O₂（质荷比32）的离子流曲线出现负峰。更多还原

【Abstract】 The decomposition of CaC₂O₄ was investigated by means of thermogravimetry/Fourier transform infrared spectrometry/mass spectrometry（TG/FTIR/MS）.The evolved gas was studied qualitatively and quantitatively by changing the sample weight and the oxygen content of atmosphere.The co-evolution of CO and CO₂ was observed during both decomposition processes of CaC₂O₄ under inert atmosphere.The CO₂ gas co-evolved with CO derives from the disproportion and oxidation of CO,while the CO gas coevolved with CO₂ from the gasification of carbon,produced by the disproportion of CO,with CO₂.Both disproportion and gasification are remarkably influenced by the content of the residue oxygen in the system.These two reactions cannot be detected when the concentration of oxygen is above 38×10^-6 and a negative peak on MS signal with m/z 32 appears.更多还原