Enhancement of Tolerance to the Humidity by Chemical Vapor Deposition of Silicon Alkoxide on Pd-Mordenite Catalyst in the Reaction of NO, Methane and Oxygen

In order to enhance the tolerance of Pd loaded on zeolite catalyst to the humidity, chemical vapor deposition of silicon alkoxide has been studied in the reduction of NO by methane in the presence of oxygen. The suppression of activity by the added water vapor was able to be reduced or almost disregarded by the deposition of silica.