摘要
采用急冷技术制备铜 -铝合金 ,然后用氢氧化钠溶液将合金展开制得骨架铜催化剂。研讨了碱浓度、展开温度、展开时间及合金制备方法对骨架铜催化剂的脱氢活性和选择性的影响 ,并用XRD。
In this paper,Raney copper catalysts were prepared from Cu-Al alloy precursors by sodium hydroxide leaching at 363K. Two types of Cu-Al alloy precursors were adopted in this work, one is the traditional crystalline Cu-Al alloy(c-Cu 50 Al 50 ) and another is the rapidly quenched Cu-Al ribbon(γ-Cu 50 Al 50 ). The effects of the alkalinity, leach temperature, leach time and the method of making Cu-Al alloy on the dehydrogenating activity and selectivity of Raney copper catalyst. Temperature-programmed reduction(TPR) experimental results showed that the catalysts could be reduced at 623K to produce clean surfaces. The mircrocalorimetic adsorption measurement indicated that the Raney copper catalyst is more and stronger sites for the adsorption of H 2 than the conventional Raney copper catalyst.
出处
《常熟高专学报》
2000年第4期49-52,共4页
Journal of Changshu College
关键词
骨架铜
急冷技术
催化剂
非晶态合金
Raney copper catalyst
Copper-aluminum alloy
Rapid quench
