In this section, you can access to the latest technical information related to the FUTURE project topic.

A novel process of ozone catalytic oxidation for low concentration formaldehyde removal

Abstract To reduce energy costs, minimize secondary pollution from undecomposed ozone, and improve the efficiency of ozone use, a novel process of cycled storage-ozone catalytic oxidation (OZCO) was employed to remove formaldehyde (HCHO) at low concentrations in air. We applied Al2O3-supported manganese oxide (MnO x ) catalysts to this process, and examined the HCHO adsorption capacity and OZCO performance over the MnO x catalysts. Owing to the high dispersion of MnO x and low oxidation state of manganese, the MnO x /Al2O3 catalysts with a manganese acetate precursor and 10%-Mn loading showed good performance in both storage and OZCO stages. The presence of H2O led to a decrease of the HCHO adsorption capacity owing to competitive adsorption between moisture and HCHO at the storage stage; however, high relative humidity (RH) favored complete conversion of stored HCHO to CO2 at the OZCO stage and contributed to an excellent carbon balance. Four low concentration HCHO storage-OZCO cycles with a long HCHO storage period and relatively short OZCO period were successfully performed over the selected MnO x /Al2O3 catalyst at room temperature and a RH of 50%, demonstrating that the proposed storage-OZCO process is an economical, reliable, and promising technique for indoor air purification.

» Author: Bin Zhu, Xiao-Song Li, Peng Sun, Jing-Lin Liu, Xiao-Yuan Ma, Xiaobing Zhu, Ai-Min Zhu

» Reference: Chinese Journal of Catalysis, Volume 38, Issue 10

» Publication Date: 01/10/2017

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