기체상태의 isobutyraldehyde에 의한 고체입자 MoO₃의 환원반응과 산소에 의한 MoO₂의 재산화반응을 반응온도 400∼600 ℃, isobutyraldehyde 분압 0.04∼0.17 atm 및 산소분압 0.3 atm에서 flow microbalance reactor를 사용하여 연구하였다.
Isobutyraldehyde에 의한 MoO₃의 환원반응의 경우, isobutyraldehyde는 산화탈수소되어 거의 methacrolein으로 되었고, MoO₃는 550 ℃ 이상에서는 완전히 MoO₂로 환원되었으며 그 이하의 온도에서는 반응온도에 따라 MoO₂로의 환원도에 차이가 있었다. 이러한 환원반응은 표면반응이 율속인 미반응각모델에 적용될 수 있었으며 활성화에너지는 15 Kcal/g mole이었다.
산소에 의한 MoO₂의 재산화반응은 온도 450∼487 ℃에서 MoO₂가 거의 MoO₃로 재산화되었으며 ash layer를 통한 확산이 율속인 미반응각 모델에 적용될 수 있었다. 이때의 활성화에너지는 47 Kcal/g mole이었다.

The kinetics of the reduction of MoO₃ with isobutyraldehyde and the reoxidation of reduced MoO₂ with oxygen were studied in a flow microbalance reactor over the temperature range of 400 ℃ to 600 ℃, isobutyraldehyde partial pressure of 0.04-0.17 atm and oxygen partial pressure of 0.3 atm.
On the reduction of MoO₃ with isobutyraldehyde, isobutyraldehyde was mainly dehydrogenated to methacrolein and MoO₃ was completely reduced to MoO₂ at higher temperature than 550 ℃. The degree of reduction of MoO₃ to MoO₂ was decreased with decrease in reaction temperature at lower temperatures. This reaction of MoO₃ reduction with isobutyraldehyde could be explained by chemical reaction control in the unreacted core model and the activation energy was 15 Kcal/g mole.
On the reoxidation of MoO₂ with oxygen over the temperature range of 450 ℃ to 487 ℃, MoO₂ was almost reoxidized to MoO₃ and its reaction model could be explained by diffusion control through ash layer. The activation energy of reoxidation of MoO₂ with O₂ was 47 Kcal/g mole.