Reduction of NO_x stored at low temperatures on a NO_x adsorbing catalyst

摘要

Isothermal storage and reduction of NO_2 with CO,C_3H_6 and H_2 as reducing agents on a lean NO_x adsorber was investigated by temperature programmed desorption (TPD) and temperature programmed reduction (TPR) studies.The reduction of NO_x was clearly favoured with H_2 as reducing agent.Carbon monoxide and C_3H_6 showed fairly low reduction of NO_x.The NO_x reduction at low temperatures with H_2 as reducing agent was found to be effective,clearly much more effective than for CO.