Organic Chemistry: Current Research
Open Access
ISSN: 2161-0401
ISSN: 2161-0401
Tingyu Zhu
Institute of Process Engineering-CAS, China
Posters & Accepted Abstracts: Organic Chem Curr Res
Volatile organic compounds (VOCs) are regarded as great contributors to air pollution and dangerous to human health. Among the VOCs pollutants, oxygenated volatile organic compounds (OVOCs), including acids, alcohols, esters, ethers and ketones, are classified as an important group of VOC pollutants. In comparison to other techniques, catalytic oxidation is recognized as the most promising method for VOC removal due to its advantages of higher efficiency, lower operation temperature and generation of less secondary pollution. Ruthenium catalysts have gained increasing importance due to their remarkable catalytic performance in the catalytic oxidation of alkanes, alkenes, aromatics, and some halogenated volatile organic compounds. In order to explore a practical catalyst for OVOC abatements, ruthenium-based bimetallic catalysts of Ru-5M/TiO2 (M=Co, Ce, Fe, Mn, Cu, Ni) were prepared, and compared in the oxidation ethyl acetate. It was found that Ru-5Cu/TiO2 contributed the highest catalytic activity and stability, demonstrating CuO as the best dopant. The influence of the Ru and CuO contents on the catalytic activity was also studied, and 1wt. % Ru and 5wt. % CuO were confirmed. Ru-5Cu/TiO2 was also employed in the catalytic oxidation of other OVOCs, including diethyl ether, acetaldehyde, and acetone as typical compounds for ethers, aldehydes and ketones and the catalyst showed excellent catalytic performance. TEM images presented that the Ru and Cu species showed similar distributions on the catalyst surface. H2-TPR results revealed that the reducibility of ruthenium oxide and cobalt oxides were apparently enhanced, suggesting a synergistic effect between Ru and Cu in the 1Ru-5Cu/TiO2 bimetallic catalyst. Additionally, systematic in-situ FTIR studies were conducted, and the reaction mechanism for the oxidation of ethyl acetate over Ru-Cu bimetallic catalyst was proposed.