The regular reaction rate oscillations were observed by mass-spectrometry in the oxidation of propane over the Ni foil. CO, CO₂, H₂, and H₂O were detected as products. The oscillations of products and reactants in the gas phase were accompanied by the oscillations of the catalyst temperature. It was shown by using isotopic labeling ¹⁸O₂ that CO and CO₂ formed simultaneously by the propane oxidation when the catalyst was in the highly active state. The non-isothermal model of a continuous stirred-tank reactor based on a microkinetic scheme including 50 reaction steps was developed. The model takes into account periodic oxidation and reduction of nickel and formation of main products. Using the method of quasi-steady-state approximations, it was shown that the observed self-sustained oscillations are associated with periodic changes in the coverage of the Ni surface by adsorbed oxygen and carbon as well as nickel oxide species. It was shown that the microkinetic scheme coupled with a continuous stirred-tank reactor model qualitatively describes the experimental data if the model also considers the periodic processes of oxidation and reduction of the Ni bulk.

通过质谱法在丙烷在镍箔上的氧化中观察到规则的反应速率振荡。检测到CO，CO ₂，H ₂和H ₂ O为产物。气相中产物和反应物的振荡伴随着催化剂温度的振荡。通过同位素标记¹⁸ O ₂表明，CO和CO ₂当催化剂处于高活性状态时通过丙烷氧化同时形成。基于包括50个反应步骤的微动力学方案，建立了连续搅拌釜反应器的非等温模型。该模型考虑了镍的定期氧化和还原以及主要产物的形成。使用准稳态近似方法，表明观察到的自持振荡与吸附的氧和碳以及氧化镍物质对镍表面的覆盖率的周期性变化有关。结果表明，如果该模型还考虑了Ni块体的氧化和还原的周期性过程，则该微动力学方案与连续搅拌釜反应器模型相结合，定性地描述了实验数据。