Synergistic Catalytic Effects of Fe-Based Bimetallic Nanocatalyst and Non-thermal Plasma on Removal of Acetaldehyde

Abstract

Acetaldehyde is a typical volatile organic compound (VOC) releasing from food waste. Fe-based bimetallic nanocatalyst combined with non-thermal plasma (NTP) for acetaldehyde catalytic oxidation is an high efficient and energy-saving method. The pore structure parameters of FeCoO x TiO2, FeCeO x TiO2 and FeMnO x TiO2 bimetal nanocatalysts were analyzed quantitatively by N2 adsorption-desorption test. The phase composition and active element valence of three Fe-based bimetallic nanocatalysts were analyzed and compared by XRD. The experimental data showed the microporous and mesoporous structures of FeCoO x bimetal oxides were more complete, and the elemental dispersibility was better. In the non-thermal plasma-catalyst (NTPC) system, the introduction of Fe-based bimetallic nanocatalyst significantly improved the catalytic efficiency of acetaldehyde and catalytic selectivity of CO2. FeCoO x TiO2 had the best performance among these three nanocatalysts with acetaldehyde catalytic conversion rate reaching 87.5% and CO2.selectivity higher than 90%, under the specific energy density (SPD) of 180 J. L-1, which was less than half of the energy consumption in a single non-thermal plasma catalytic reaction. By optimizing the microstructure and elemental composition of Fe-based bimetallic nanocatalyst, it is expected to be an effective method to improve catalytic performance, which is also a promising approach for improving VOCs removal efficiency and reducing energy consumption.