頁籤選單縮合
題名 | 肉桂醛於銀-鈷觸媒之液相選擇性氫化反應=Selective Hydrogention of Cinnamaldehyde in Liquid-phase Over Ag-Co Catalysts |
---|---|
作者 | 廖炳傑; 游汶玟; | 書刊名 | 桃園創新學報 |
卷期 | 33 2013.12[民102.12] |
頁次 | 頁373-388 |
分類號 | 341.393 |
關鍵詞 | 肉桂醛; 銀-鈷觸媒; 化學還原; 氫化; 不飽和醇; Cinnamaldehyde; Ag-Co catalyst; Chemical reduction; Hydrogenation; Unsaturated alcohol; |
語文 | 中文(Chinese) |
中文摘要 | 本研究採用硼氫化鈉化學還原法製備Ag-Co觸媒,以BET、XRD、TEM及DSC等技術分析觸媒之物理性質,以液相肉桂醛選擇性氫化反應探討觸媒之催化行為,進行系列的探討包括觸媒製備條件、反應條件、全氫化現象、促進劑效應等因素對反應活性及不飽和醇選擇率之影響。相同金屬含量2 mmol條件下,Ag觸媒活性遠低於CoB觸媒,製備過程以Co替代部分Ag,少量Co即能顯著降低銀金屬粒徑,促進Ag觸媒活性,最佳Ag-Co觸媒之Ag/Co比例為6/4。Ag-Co(6/4)觸媒不僅活性媲美CoB觸媒,相同轉化率下之肉桂醇選擇率更優於CoB觸媒。 |
英文摘要 | The Ag-Co catalysts were prepared by chemical reduction with sodium borohydride. Physical properties of catalysts were characterized by techniques of BET, XRD, TEM and DSC. The catalytic behaviors of catalysts were explored by the selective hydrogenation of cinnamaldehyde in liquid phase. The factors affecting the activity and selectivity of catalysts included the preparation conditions of catalysts, reaction conditions, phenomena of overall hydrogenation and promoter effect. The Ag catalyst was much less active than CoB under the basis of same metal content. Replacing a part of Ag by Co during the preparation could significantly reduce the particle size of silver metal, promoting the activity of Ag catalyst. The optimal molar ratio of Ag/Co in Ag-Co catalysts was 6/4. Ag-Co(6/4) catalyst was not only as active as CoB catalyst, but also the selectivity to cinnamyl alcohol (unsaturated alcohol) was higher under the same conversion. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。