Abstract
To remove ammonia slip during in-use commercial vehicles lifetime, there is an increasing need to accurately evaluate the aging of ammonia slip catalysts. In this study, modeling of the hydrothermal aging effect for platinum group metal catalyst was investigated. The model was developed by correlation between the hydrothermal treatment temperature, hydrothermal treatment time and ammonia oxidation reaction parameters. As for experiment and simulation results of developed model, the change of ammonia oxidation reactivity and selectivity by hydrothermal aging could be calculated accurately. In addition to this, reaction path analysis revealed selectivity at low temperature are more sensitive compared to one at high temperature.
