采用平行比较法研究了Pt-10Rh、Pt-4Pd-3.5Rh和Pt-12Pd-3.5Rh-RE合金以及其氨氧化催化剂的结构与性能.与传统的Pt-10Rh和Pt-4Pd-3.5Rh合金及其催化剂比较,以稀土改性的合金,即Pt-12Pd-3.5Rh-RE合金及其催化剂,具有更高的力学性能(包括室温和高温拉伸强度、持久强度和抗蠕变能力)和更低的挥发速率;在常压和中压硝酸生产过程中,该新舍金催化剂具有更高的氨氧化转化率、更低的铂耗率和氨耗率、更高的抗腐蚀、抗中毒和抗粘连能力以及更长的使用寿命.
A comparative study for the structure and performances of Pt-10Rh, Pt-4Pd-3.5Rh and Pt-12Pd-3.5Rh-RE alloys as the ammonia oxidation catalysts was carried out.Compared with the traditional Pt-10Rh and Pt-4Pd-3.5Rh catalytic alloys, the new alloy, Pt-12Pd-3.5Rh-RE, possesses higher mechanical properties, including the tensile strength at room and high temperatures, the lasting strength and the creep resistivity, and lower volatilization rate.The catalytic gauzes made of the new alloy show higher conversion rate of ammonia to oxides of nitrogen, lower platinum-loss rate and ammonia-consumption rate, greater corrosion-, adhesion-and poisoning-resistance, and longer service life in the industrial nitric acid production process in the atmospheric and medium pressure reactors.
参考文献
| [1] | Chernyshov V I;Kisil I M .Platinum metals catalytic systems in nitric acid plants[J].Platinum Metals Review,1993,37(03):136-143. |
| [2] | 宁远涛.贵金属-稀土合金的结构、性能和新材料研究[J].贵金属,1994(02):61-71. |
| [3] | He Huachun;Hu Changyi;Guo Jinxin et al.Effects of rare earth elements on high temperature tensile strength and plasticity of platinum[J].Precious Metals,1991,12(02):19-24. |
| [4] | Zhao Kunyu;Li Dingxin .The mechanisms to improve the high temperature tensile strength of platinum with rare earth elements[J].Precious Metals,1993,14(02):9-12. |
| [5] | 胡昌义,何华春,陈伏生.稀土和难熔金属元素对铂的高温蠕变激活能的影响[J].贵金属,1998(01):1-4. |
| [6] | Ning Yuantao;Hu Xin .Strengthening platinum-palladium-rhodium alloys by rithenium and cerium additions[J].Platinum Metals Review,2003,47(03):111-119. |
| [7] | Ning Yuantao;Wang Jianguo .Catalytic platinum alloys used for ammonia oxidation[P].Chinese patent,ZL92104729.0,1994-09. |
| [8] | 宁远涛,戴红,文飞.催化合金Pt-Pd-Rh-M四元系的结构与性能[J].贵金属,1997(02):1-7. |
| [9] | N.Yuantao;Y.Zhengfen .Platinum Loss from Alloy Catalyst Gauzes in Nitric Acid Plants[J].Platinum Metals Review,1999(2):62-69. |
| [10] | Rubel M;Pszonicka M;Palczewska W .The effects of oxygen interaction with Pt-Rh catalytic alloys[J].Journal of Materials Science,1985,20:3639-3648. |
| [11] | Rubel M;Pszonicka M .Oxygen Interaction with Pt-Pd-Rh catalytic alloys[J].Journal of Materials Science,1986,21:241-245. |
| [12] | 宁远涛,文飞,戴红.新型氨氧化催化合金的工业应用[J].贵金属,1997(03):1-7. |
| [13] | Benner L S;Suzuki T;Meguro K.Precious Metals Science and Technology[M].Austin U.SA; The International Precious Metals Institute,1991 |
| [14] | Yuantao Ning;Zhengfen Yang;Huaizhi Zhao .Platinum Recovery by Palladium Alloy Catchment Gauzes in Nitric Acid Plants[J].Platinum Metals Review,1996(2):80-87. |
| [15] | McCabe A R;Smith G D W .The chemical characterisation of rhodium-platinum surfaces[J].Platinum Metals Review,1988,32(01):11-18. |
| [16] | Ning Yuantao .Research on surface structure of catalyst and catchment alloys used in nitric acid industry[J].Science Foundation in China,1998,6(01):28-31. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%