A COMPARISON OF THE CATALYTIC OXIDATION OF FORMALDEHYDE OVER THREE TYPES OF CATALYSTS AT AMBIENT TEMPERATURE: THE EFFECT OF SUPERFICIAL VELOCITY

作者：Miao, H.; He, J.^*; Liu, T.^*; Cao, Y.

来源：Applied Ecology and Environmental Research, 2018, 16(4): 5059-5069.

DOI：10.15666/aeer/1604_50595069

• Pt/GAC catalyst
• MnOx/GAC catalyst
• commercial HCHO catalyst
• HCHO removal
• reaction bed height
• room temperature

Catalytic oxidation of formaldehyde (HCHO) at ambient temperature is regarded as a promising technology for removal and destruction of HCHO contaminated air. In this study, three types of catalyst which are commercial HCHO catalyst, the catalyst of granular activated carbon supported Pt (Pt/GAC catalyst) and the catalyst of granular activated carbon supported MnOx (MnOx/GAC catalyst) were chosen for oxidizing HCHO. The impact of superficial velocity, reaction bed height and the type of catalyst to the removal efficiency of HCHO was investigated. The fact that removal efficiency of HCHO increased firstly and then decreased with the decrease of superficial velocity illustrates its effect on the catalytic oxidation existed at an optimum value, depending on the nature of different catalysts, design of the reaction bed and the operation conditions. The steady state removal efficiencies of HCHO were all above 99% when the superficial velocity was 0.5, 1.0 and 1.5 m/s respectively, yet the needed height shortened with decreasing the superficial velocity. Among the three types of catalysts, Pt/GAC catalyst shows the effective and stable catalytic activity, whose removal efficiencies reached over 90% and the conversion did not change too much with the time increasing.

• 出版日期2018
• 单位同济大学