Kim, Minsu Park, Eunseuk Jurng, Jongsoo 2024-01-19T23:31:33Z 2024-01-19T23:31:33Z 2021-09-03 2018-02-01 0032-5910 https://pubs.kist.re.kr/handle/201004/121721 The TiO2 support materials were synthesized by a chemical vapor condensation (CVC) method and the subsequent MnOx/TiO2 catalysts were prepared by an impregnation method in our previous studies. Catalytic oxidation of formaldehyde on the MnOx/TiO2 catalysts was examined with ozone. Formaldehyde (HCHO) is a specific volatile organic compound (VOC) found in indoor air of both residential places and workshops and must be removed to improve air quality. Catalytic oxidative decomposition of HCHO at room temperature (25 degrees C) is considered one of the most promising strategies for this. In this study, MnOx/TiO2 was prepared using chemical vapor condensation (CVC) as a HCHO ozone (O-3) catalyst that operates at 25 degrees C. In this catalytic oxidation experiment, the HCHO of the gas stream on the MnOx/CVC-TiO2 catalyst was completely oxidized to CO2 with the addition of O-3. The removal efficiency of HCHO increased from 35.3% to 100% as the O-3:HCHO ratio increased from 1 to 5. COX selectivity also increased significantly with the increasing O-3:HCHO ratio. As the relative humidity (RH) increased, HCHO removal efficiency and mineralization to CO2 increased. The HCHO removal efficiency increased to 100% at RH = 50%, whereas it was 85% at RH = 10%. The mineralization to CO2 increased to 100% at RH = 80%, and was 15% at RH = 10%. (C) 2017 Elsevier B.V. All rights reserved. English ELSEVIER CHEMICAL-VAPOR CONDENSATION BENZENE OXIDATION WATER-VAPOR VOC REMOVAL OXIDE SUPPORT HCHO MNOX CVC AIR Oxidation of gaseous formaldehyde with ozone over MnOx/TiO2 catalysts at room temperature (25 degrees C) Article 10.1016/j.powtec.2017.10.031 1 POWDER TECHNOLOGY, v.325, pp.368 - 372 POWDER TECHNOLOGY 325 368 372 scie scopus 000425476700040 2-s2.0-85034622214 Engineering, Chemical Engineering Article CHEMICAL-VAPOR CONDENSATION BENZENE OXIDATION WATER-VAPOR VOC REMOVAL OXIDE SUPPORT HCHO MNOX CVC AIR Formaldehyde Chemical vapor condensation (CVC) Impregnation Manganese oxide Room temperature Ozone(O3)