Influence of Ag-based Supported Catalyst via Hydrothermal Synthesis on the Catalytic Treatment Efficiency of Formaldehyde Gas. Issue 4 (August 2020)

• Record Type: Journal Article
• Authors: Yang, Yue; Chen, Shanyuan; Wu, Taotao; Wang, Runmin; Guan, Chengli
• Is Part Of: IOP conference series. Volume 558:Issue 4(2020)
• Publication Date: 2020-08
• Subjects: hydrothermal synthesis -- CeO2 nanorods -- Ag -- formaldehyde -- catalytic oxidation; Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/558/4/042016
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: This study aims to explore the influencing factors of the Ag-based supported catalyst synthesized via hydrothermal synthesis method in formaldehyde catalytic oxidation treatment. CeO2 nanorods (CeO2 -r) is prepared by hydrothermal synthesis method, and a series catalyst of Ag-K/CeO2 -r with different concentrations of active components are prepared by adding active components to the nanorods by maceration method. The best weight hourly space velocity (WHSV), the best concentration of formaldehyde, and the best concentration of active components are studied with the prepared catalysts. When the WHSV is between 26000cm3(g h)-1 and 42000cm3(g h)-1, the maximum conversion rate is at the WHSV of 360003(g h)-1. The different formaldehyde concentrations are set, it is found that when the formaldehyde concentration is 300ppm, the conversion rate of formaldehyde through the catalyst can reach 100%. Under the condition of 300ppm, 360003(g h)-1, the optimal conversion rate of 4%Ag-K/CeO2 -r catalyst is found to be the best at all temperatures. Moreover, the physical adsorption of the catalyst is related to whether the catalyst is loaded with auxiliary agent K. In this study, the Ag-based supported catalyst is prepared via hydrothermal synthesis method and the influencing factors of formaldehyde gas treatment are successfully investigated, which lay a solid foundation for further experiments.