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钙钛矿型催化剂La_(0.2)Ca_(0.8)MnO_3在氨氧化制硝酸反应中具有良好的催化活性和稳定性,但在使用中发现容易被空气中的微量硫化物毒化。一些作者曾研究过这类催化剂在烯烃和CO氧化以及NO还原反应中的硫中毒问题,但关于这类催化剂在氨氧化反应中的硫中毒问题尚未见有报道。为了解氨氧化反应中催化剂的中毒规律以及对进一步
The perovskite-type catalyst La_ (0.2) Ca_ (0.8) MnO_3 has good catalytic activity and stability in the ammonia oxidation of nitric acid. However, it is found that it is easily poisoned by trace sulphide in air. Some authors have studied the sulfur poisoning of such catalysts in the oxidation of olefins and CO and in the reduction of NO, but there has been no report about the sulfur poisoning of such catalysts in ammoxidation. In order to understand the ammonia oxidation catalyst poisoning law as well as further