中山大学学报自然科学版 ›› 2011, Vol. 50 ›› Issue (6): 78-81.

• 研究论文 • 上一篇    下一篇

Cu-Ni/C催化剂的低温制备及其催化合成碳酸二甲酯的研究

阮镜棠,肖 敏,王拴紧,孟跃中
  

  1. (中山大学低碳化学与过程节能广东省重点实验室,广东 广州 510275)
  • 收稿日期:2011-03-15 修回日期:1900-01-01 出版日期:2011-11-25 发布日期:2011-11-25
  • 通讯作者: 肖敏

Preparation of Cu-Ni/C Catalyst at Low Temperature for Synthesis of Dimethyl Carbonate (DMC)

RUAN Jingtang, XIAO Min, WANG Shuanjin, MENG Yuezhong   

  1. (The Key Laboratory of Lowcarbon Chemistry& Energy Conservation of Guangdong Provice,Sun Yatsen University, Guangzhou 510275, China)
  • Received:2011-03-15 Revised:1900-01-01 Online:2011-11-25 Published:2011-11-25

摘要: 采用氧化石墨(GO)作为碳素载体前驱体,金属氨配合物作为金属前驱体,用水合肼以低温液相还原的方式制备了碳负载铜镍合金催化剂(Cu-Ni/C)。通过FTIR、XRD、SEM、TEM和微反技术来研究催化剂的微观结构和反应性能。结果表明,90 ℃下还原得到碳负载的铜镍合金催化剂的合金粒径小于50 nm,能很好的分散于载体表面。在140 ℃,0.6 MPa的条件下,CH3OH和CO2在催化剂的金属活性位上发生反应,生成碳酸二甲酯(DMC),甲醇的最高转化率为4.2%,DMC的选择性达到84.5%。

关键词: 甲醇, 二氧化碳, 碳酸二甲酯, 氧化石墨, 低温还原

Abstract: Carbon supported copper-nickel alloy catalysts (Cu-Ni/C) were prepared by the low temperature hydrothermal reduction method. The Cu-Ni/C catalysts were characterized by FTIR, XRD,SEM and TEM analyses. The results indicated that the graphite oxide (GO) and metal precursors could be reduced at the same time. The TEM images showed that the alloy particles were well dispersed at the carrier surface with the size less than 50 nm for the catalyst synthesized at 90 ℃. The catalysis performances for direct syntheses of DMC form CO2and CH3OH were investigated and the highest CH3OH conversion of 4.2% and the DMC selectivity of 84.5% could be achieved.

Key words: CH3OH, CO2, DMC, Graphite oxide, hydrothermal reduction

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