頁籤選單縮合
| 題 名 | Characterization of Ni-K Catalysts Supported on γ-Alumina and Reactivity for the Hydrogenation of 1,3-Butadiene |
|---|---|
| 作 者 | Song,Min Woo; Lee,Eun Ku; Kang,Min; Kim,Kyung Lim; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
| 卷 期 | 33:3 2002.05[民91.05] |
| 頁 次 | 頁217-224 |
| 分類號 | 468.8 |
| 關鍵詞 | 選擇性氫化反應; Selective hydrogenation; Ni; K; Electron density; 1-Butene selectivity; |
| 語 文 | 英文(English) |
| 英文摘要 | A series of γ-Al₂O₃ supported K added Ni catalysts were prepared in order to investigate the effect of K on the selective hydrogenation of 1,3-butadiene. The catalysts were prepared by impregnation, with loadings of 15 wt% Ni and varying amounts of K[(K/Ni+K)atomic = 0.2-0.6] followed by calcinations at 400℃. Reduction was performed at 450℃ for 5h. They were characterized by temperature-programmed reduction (TPR), 1, 3-butadient-temperare programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS)and X-ray absorbance near edge structure (XANES) spectroscopy. Activity and product selectivities were tested for hydrogenation of 1,3-butadiene in the temperature range of 100-300℃. The set of data indicate that the addition of K modified the electron density of Ni metal and weakened the adsorption strength of butadiene. It has been established by a shift of the Ni2p3/2 binding energy in XPS measurement, Ni absorption edge in XANES spectroscopy and 1,3-butadiene-TPD measurements. The catalysts exhibited a high activity and selectivity for 1-butene particularly the added Ni catalysts due to the promotion of K for Ni based catalysts. |
本系統中英文摘要資訊取自各篇刊載內容。