| Title: | Effects of metal and acidic sites on the reaction by-products of butyl acetate oxidation over palladium-based catalysts |
| Author(s): | Yue L; He C; Hao Z; Wang S; Wang H; |
| Address: | "Department of Environmental Nano-materials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. The Administrative Center for China's Agenda 21, Beijing 100038, China. National Urban Environmental Pollution Control Engineering Techniques Research Center, Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China. Electronic address: wanghailin@cee.cn" |
| DOI: | 10.1016/S1001-0742(13)60439-8 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "Catalytic oxidation is widely used in pollution control technology to remove volatile organic compounds. In this study, Pd/ZSM-5 catalysts with different Pd contents and acidic sites were prepared via the impregnation method. All the catalysts were characterized by means of N2 adsorption-desorption, X-ray fluorescence (XRF), H2 temperature programmed reduction (H2-TPR), and NH3 temperature programmed desorption (NH3-TPD). Their catalytic performance was investigated in the oxidation of butyl acetate experiments. The by-products of the reaction were collected in thermal desorption tubes and identified by gas chromatography/mass spectrometry. It was found that the increase of Pd content slightly changed the catalytic activity of butyl acetate oxidation according to the yield of CO2 achieved at 90%, but decreased the cracking by-products, whereas the enhancement of strong acidity over Pd-based catalysts enriched the by-product species. The butyl acetate oxidation process involves a series of reaction steps including protolysis, dehydrogenation, dehydration, cracking, and isomerization. Generally, butyl acetate was cracked to acetic acid and 2-methylpropene and the latter was an intermediate of the other by-products, and the oxidation routes of typical by-products were proposed. Trace amounts of 3-methylpentane, hexane, 2-methylpentane, pentane, and 2-methylbutane originated from isomerization and protolysis reactions" |
| Keywords: | Acetates/*chemistry Air Pollution/prevention & control Gas Chromatography-Mass Spectrometry Metals/chemistry Oxidation-Reduction Palladium/*chemistry Pd/ZSM-5 VOCs butyl acetate catalytic oxidation reaction by-product; |
| Notes: | "MedlineYue, Lin He, Chi Hao, Zhengping Wang, Shunbing Wang, Hailin eng Research Support, Non-U.S. Gov't Netherlands 2014/08/01 J Environ Sci (China). 2014 Mar 1; 26(3):702-7. doi: 10.1016/S1001-0742(13)60439-8" |
