甲醛低温催化氧化动力学研究 Ⅰ本征动力学

Kinetic study on catalytic oxidation of formaldehyde at low temperature Ⅰ Intrinsic kinetics

Formaldehyde as an indoor pollutant is harmful to human health even with a very low content in the atmosphere.It can be removed through catalytic oxidation,and Pt/TiO2 proved to be a potential catalyst and can be operated at low temperature and high space velocity.To understand the mechanism of catalytic oxidation of formaldehyde over Pt/TiO2,the intrinsic kinetics of reaction was investigated in a fixed-bed plug flow differential reactor at atmospheric pressure.A power law rate equation was established as r=1.87×107 exp（-47.50×103/（R×T））×c1.27HCHO,which gave a good correlation to the experimental results.

Formaldehyde as an indoor pollutant is harmful to human health even with a very low content in the atmosphere. It can be removed through catalytic oxidation, and Pt/TiO2 proved to be a potential catalyst and can be operated at low temperature and high space velocity. To understand the mechanism of catalytic oxidation of formaldehyde over Pt/TiO2, the intrinsic kinetics of reaction was investigated in a fixed-bed plug flow differential reactor at atmospheric pressure. A power law rate equation was established as r = 1.87 × 10^7 exp（ -47.50 × 10^3/（R×T）×cHCHO^1.27, which gave a good correlation to the experimental results.