| Title: | Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd-Ce/ZSM-5 catalysts |
| Author(s): | Yue L; He C; Zhang X; Li P; Wang Z; Wang H; Hao Z; |
| Address: | "Department of Environmental Nano-materials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China" |
| DOI: | 10.1016/j.jhazmat.2012.10.048 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Catalytic oxidation is a widely used pollution control technology for removing volatile organic compounds. Pd-Ce/ZSM-5 catalysts with different Ce contents were prepared by a co-impregnation method, and their catalytic performance was investigated for the oxidation of methyl ethyl ketone (MEK). The by-products of the reaction were monitored using gas chromatography and collected in thermal desorption tubes, which were further analyzed by gas chromatography/mass spectrometry. The PdCe(9.6)/ZSM-5 catalyst displayed the highest catalytic efficiency, as a consequence of a higher amount of strong acid sites and a superior PdO-Pd redox cycle in the presence of a CeO(2) additive. The introduction of CeO(2) enriched the by-product species. The formation mechanisms and oxidation routes of typical by-products, such as methyl acetate, 1-penten-3-one and 3-buten-2-one, 3-methyl, during MEK oxidation over Pd-Ce/ZSM-5 catalysts was also analyzed. CH(3)* species that formed on the catalyst were identified as reaction intermediaries. Trace amounts of acetic acid and methyl vinyl ketone were also detected and were further oxidized to methyl acetate, 1-penten-3-one and 3-buten-2-one, 3-methyl" |
| Keywords: | Air Pollutants/*chemistry Air Pollution/prevention & control Butanones/*chemistry Catalysis Cerium/*chemistry Oxidation-Reduction Palladium/*chemistry Solvents/chemistry Temperature X-Ray Diffraction Zeolites/*chemistry; |
| Notes: | "MedlineYue, Lin He, Chi Zhang, Xinyan Li, Peng Wang, Zhuo Wang, Hailin Hao, Zhengping eng Research Support, Non-U.S. Gov't Netherlands 2012/11/28 J Hazard Mater. 2013 Jan 15; 244-245:613-20. doi: 10.1016/j.jhazmat.2012.10.048. Epub 2012 Nov 3" |
