The Influence of Water Vapor and Sulfur Dioxide on the Catalytic Decomposition of Nitrous Oxide

摘要

In a catalysts screening for the nitrous oxide decomposition,three groups of catalysts (metals on supports, hydrotalcites, and perovskites) were studied relating to their activity in the presence of vapor or sulfur dioxide, in the temperature range from 200 to 500deg C.It was found that the water vapor strongly inhibiates the nitrous oxide decomposition at T=200-400 deg C. The sulfur dioxide poisons the catalysts, in particular the perovskites. The catalysts Rh-ZrO_2 and Ex-Co,Rh-Al-HTlc are potentially suitable for the nitrous oxide decomposition in exchaust gas at around T=500deg C.