摘要
以不含贵金属的稀土 过渡族金属四元复合氧化物为催化剂 ,模拟汽车尾气的组成含量 ,运用连续流动式反应器 ,研究了四元复合氧化物La0 5Sr0 5Ni1 -xCuxO3系列 (x =0—1 0 )对CO和NOx 的催化氧化还原消除活性及其在消除反应条件的抗硫中毒能力 .实验结果表明 ,钙钛矿型四元复合氧化物催化剂La0 5Sr0 5Ni0 5Cu0 5O3对CO和NOx 的氧化还原消除都具有较高的活性 ;脉冲中毒实验指出 ,当反应温度≥ 3 0 0℃ ,SO2 在催化剂中的脉冲积累含量为 1 2 2× 1 0 - 2 mmol时 ,该复合氧化物仍表现出良好的抗硫毒性能 ,它对CO的氧化消除活性并未因体系中SO2
The catalytic oxidation-reduction elimination activity and the anti-sulfur properties for CO,NO x on series of catalysts La 0.5Sr 0.5Ni 1-xCu xO 3(x=0—1.0)were investigated with continuous flowing reactor by means of simulating component of CO+NO x in the exhaust gas.Results show that the catalyst La 0.5Sr 0.5Ni 0.5Cu 0.5O 3 has better activity for oxidation-reduction elimination of CO and NO x From pulse-poison test we can find that it still show better anti-sulfur properties at higher reaction temperature(>300℃)when the component of SO 2 in the catalyst reached 1.22×10 -2 mmol.Oxidation elimination activity for CO of this catalyst is not influenced by SO 2 of the system.
出处
《环境化学》
CAS
CSCD
北大核心
2003年第2期177-181,共5页
Environmental Chemistry
