| 制备方法对Ru/CeO2催化剂结构和性能的影响 |
| Effect of Preparation Method on Structure and Catalytic Activity of Ru/CeO2 Catalyst for Ammonia Synthesis |
|
| 摘要: 以K2RuO4和Ce(NO3)3为原料，利用物质的氧化还原特性制备了Ru/CeO2氨合成催化剂，并运用N2物理吸附、X射线衍射(XRD)、FE-SEM、CO吸附和H2程序升温还原(H2-TPR)等技术对其进行了表征，考察了还原剂和制备方法对所制备的Ru/CeO2氨合成催化剂结构和性能的影响。结果表明由自身氧化还原法制备的催化剂，其比表面积最大，达到了120 m2·g-1，钌分散度最高，为45.6%，且催化剂活性最高，在10 MPa，10 000 h-1，425 ℃反应时,出口氨浓度达到了12.6%。 |
| 关键词: 氧化还原 钌 氨合成 二氧化铈 |
| 基金项目: |
| Abstract: Ru/CeO2 catalysts were prepared using K2RuO4 and Ce(NO3)3 as the raw materials by redox methods. The obtained catalysts were characterized by N2 physisorption, X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), CO chemisorption and temperature-programmed reduction (H2-TPR). The Ru/CeO2 catalyst prepared by self redox co-precipitation has the largest surface area of 120 m2·g-1 and the highest dispersion of 45.6%. The Ru/CeO2 catalyst prepared by self redox co-precipitation shows the best activity, the ammonia concentration in the exit gas reaches 12.6% under the conditions of 10.0 MPa, 425 ℃,and 10 000 h-1. |
| Keywords: redox ruthenium ammonia synthesis ceria |
| |
| 摘要点击次数: 1360 |
| 全文下载次数: 2347 |
| 林建新,张留明,王 榕,倪 军,魏可镁.制备方法对Ru/CeO2催化剂结构和性能的影响[J].无机化学学报,2012,28(7):1377-1382. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
