贵金属
貴金屬
귀금속
PRECIOUS METALS
2011年
1期
7-15
,共9页
金属材料%铂基合金%氨氧化催化剂%氨转化速率%铂耗率
金屬材料%鉑基閤金%氨氧化催化劑%氨轉化速率%鉑耗率
금속재료%박기합금%안양화최화제%안전화속솔%박모솔
metal material%platinum-based alloys%ammonia oxidation catalysts%conversion rate of ammonia to oxides of nitrogen%platinum-loss rate
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.
採用平行比較法研究瞭Pt-10Rh、Pt-4Pd-3.5Rh和Pt-12Pd-3.5Rh-RE閤金以及其氨氧化催化劑的結構與性能.與傳統的Pt-10Rh和Pt-4Pd-3.5Rh閤金及其催化劑比較,以稀土改性的閤金,即Pt-12Pd-3.5Rh-RE閤金及其催化劑,具有更高的力學性能(包括室溫和高溫拉伸彊度、持久彊度和抗蠕變能力)和更低的揮髮速率;在常壓和中壓硝痠生產過程中,該新捨金催化劑具有更高的氨氧化轉化率、更低的鉑耗率和氨耗率、更高的抗腐蝕、抗中毒和抗粘連能力以及更長的使用壽命.
채용평행비교법연구료Pt-10Rh、Pt-4Pd-3.5Rh화Pt-12Pd-3.5Rh-RE합금이급기안양화최화제적결구여성능.여전통적Pt-10Rh화Pt-4Pd-3.5Rh합금급기최화제비교,이희토개성적합금,즉Pt-12Pd-3.5Rh-RE합금급기최화제,구유경고적역학성능(포괄실온화고온랍신강도、지구강도화항연변능력)화경저적휘발속솔;재상압화중압초산생산과정중,해신사금최화제구유경고적안양화전화솔、경저적박모솔화안모솔、경고적항부식、항중독화항점련능력이급경장적사용수명.
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.
