| 倪军.共浸渍制备高效的Ru/AC氨合成催化剂[J].分子催化,2013,(6):530-538 |
| 共浸渍制备高效的Ru/AC氨合成催化剂 |
| Efficient Ru/AC Catalysts Prepared by Co-impregnation for Ammonia Synthesis |
| 投稿时间：2013-10-07 修订日期：2013-12-05 |
| DOI： |
| 中文关键词: 钌 负载型催化剂 多相催化 共浸渍 转化频率 |
| 英文关键词:Ruthenium supported catalysts heterogeneous catalysis co-impregnation turnover frequency |
| 基金项目:国家科技攻关计划 |
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| 摘要点击次数: 1634 |
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| 中文摘要: |
| 通过钌的络合物前驱体和硝酸钡的共浸渍制备的Ru Ba K/AC催化剂氨合成转化效率高，其氨合成转化频率在0.87～1.30 s-1之间，与氯化钌制备的Ru/AC催化剂相比，其转化频率提高幅度在26%～88%。共浸渍法制备的催化剂氨合成转化效率高，其主要原因可能是共浸渍法制备的催化剂钌粒子粒径分布区间较窄,易形成更多的活性位；钌表面氢的吸附受到抑制，氮更易活化，因而催化效率更高。 |
| 英文摘要: |
| Ru+Ba+K/AC catalysts with high turnover frequency were synthesized by co-impregnation with Ba(NO3)2 and the complex compound of glycerol and K2RuO4. The turnover frequency of the prepared catalysts is between 0.87 and 1.30 s−1, which is 1.26 to 1.88 times higher than that of the Ru/AC catalyst with RuCl3¬¬ as a precursor for ammonia synthesis. The higher turnover frequency of the Ru+Ba+K/AC catalysts than the Ru/AC catalyst could be attributed to the higher absorption and lower activation energy of nitrogen on the Ru surface and the narrow-sized distribution of Ru nanocrystals at the reaction temperature. |
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