四元复合氧化物La_(0.5)Sr_(0.5)Ni_(0.5)Cu_(0.5)O_3的抗硫性能

Study of the Sulfur-resistant Property of the Catalys t La_(0.5) Sr_(0.5) Ni_( 0.5) Cu_(0.5) O_3

以SO2 为毒物 ,采用脉冲中毒方法 ,再以CO氧化反应为探针 ,对三元复合氧化物催化剂La0 .5Sr0 .5NiO3 与La0 .5Sr0 .5CuO3 以及四元复合氧化物催化剂La0 .5Sr0 .5Ni0 .5Cu0 .5O3 等三种催化剂样品的抗硫毒能力、失活曲线、中毒催化剂的再生性能以及毒物残留形态等进行了全面考察和对比分析。实验结果表明四元复合氧化物催化剂La0 .5Sr0 .5Ni0 .5Cu0 .5O3 在SO2 毒物含量是 1 2 2×10 -2 mmol时 ,特别是在高温 (≥ 30 0℃ )条件下 。

The sulfur-resistant property,catalyst recovery , loss of activity and poison remaining form of ternary complex oxide catalyst La _ 0 .5 Sr_ 0.5 NiO_3,La_ 0.5 Sr_ 0.5 CuO_3 and quaternary complex oxide catalyst La_ 0.5 Sr_ 0.5 Ni_ 0.5 Cu_ 0.5 O_3 were studied v ia pulse-poisoning using SO_2 as poison and CO oxidation as probe.Results indica t ed that the quaternary catalyst possessed better sulfur-resistance in higher te mperature(≥300 ℃) compared with the ternary ones.