对某高压炉使用后的2批Pt-10Rh催化网取样观察.用化学分析、光谱定量、X-射线衍射、电子探针、扫描电镜等方法分析了样品的组成及状态.结果表明,催化网的Pt、Rh体浓度降低,表面Rh富集强度高并氧化为Rh2O3,"菜花状"凸起表面大,丝裂、裂纹明显,样品已完全处于碎裂失活状态.分析了失活成因,并对催化网的使用提出合理化建议.
参考文献
| [1] | 李承烈;李贤均;张国泰.催化剂失活[M].北京:化学工业出版社,1989:149-150. |
| [2] | Harberd N H .Ammonid oxidation catalysts: deposits on some rhodium-platinum gauzes[J].Platinum Metals Review,1974,18(03):97-101. |
| [3] | Mecade A R;Smith G D W .The oxidation of rhodium-platinum :a study by field ion microscopy and imaging probe techniques[J].Platinum Metals Review,1983,27(01):19-25. |
| [4] | Pielaszek J .The catalytic etching of platinum and rhodium-platinum gauzes: crystallographic changes during ammonia oxidation[J].Platinum Metals Review,1984,28(03):109-113. |
| [5] | Mecade A R;Smith G D W;Pratt A S .The mechanism of reconstruction of rhodium-platinum catalyst gauzes[J].Platinum Metals Review,1986,30(02):54-62. |
| [6] | Mecade A R;Smith G D W;Pratt A S .The chemical characterization of rhodium-platinum surfaces: changes produced on catalyst gauzes during pretreatment and ammonia oxidation[J].Platinum Metals Review,1988,32(01):11-18. |
| [7] | 宁远涛,杨正芬,赵怀志,胡新.硝酸生产用的Pt-Pd-Rh催化剂表面状态研究[J].贵金属,1999(01):1-9. |
| [8] | 赛兴鹏;戴懿;张婕.氨氧化用铂合金催化网技术进展[J].贵金属,1997(z1):515-517. |
| [9] | 赛兴鹏 .铂合金催化网在氨氧化过程中的损耗研究[J].中国锡镍及小金属,2001,10:30-34. |
| [10] | HG2271.1-1992.HG2271.1-1992.型硝酸生产用铂催化剂及其试验方法[S]. |
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