Selective Hydrogenation of Acetylene to Ethylene Over Nanosized Gold and Palladium Supported Catalysts
| Autor: | Gyeongmin Lee, Ho-Geun Ahn, Woon-Jo Jeong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Ethylene
Materials science Biomedical Engineering chemistry.chemical_element Bioengineering 02 engineering and technology General Chemistry Polyethylene 021001 nanoscience & nanotechnology Condensed Matter Physics Catalysis Metal chemistry.chemical_compound Acetylene chemistry Chemical engineering visual_art visual_art.visual_art_medium General Materials Science 0210 nano-technology Selectivity Naphtha Palladium |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 20:5800-5803 |
| ISSN: | 1533-4880 |
| Popis: | Ethylene, the main raw material for polyethylene production, is a by-product produced by thermally decomposing naphtha and it contains a small amount of acetylene. The acetylene reacts as a permanent catalyst poison for the ethylene polymerization catalyst. In this study, we wanted to improve the acetylene conversion and the ethylene selectivity by selective hydrogenation of acetylene for removing acetylene contained in ethylene. Catalyst was prepared by loading nanosized gold (Au) and palladium (Pd) particles on support (Al2O3, TiO2). Deposition order Au and Pd particles was changed. The activity of the catalyst was investigated using a flow-typed fixed bed reactor under atmospheric pressure. Au and Pd particles deposited on TiO2 were oxidized to Au2O3 and PdO due to strong metal support interaction (SMSI). It was considered that the Au/Pd/Al2O3 catalyst was more active than the Pd/Au/Al2O3 catalyst due to the formation of the interface between Au particles and Pd particles (or support). But Pd/Au/Al2O3 catalyst is considered to have poor activity because Pd particles cover part of the interface between Au and the support. Au/Pd/Al2O3 catalyst showed the best catalytic activity, and acetylene conversion and ethylene selectivity were 100% and about 80% at 40 °C, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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