REGENERATING AND ACTIVATING METHOD OF CATALYST FOR PURIFYING EXHAUST GAS FROM INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To regenerate easily a deactivated catalyst by stopping the ignition of one cylinder, diluting the gas having the proper fuel-air ratio flowing through the cylinder by mixing with the exhaust combustion gas from other cylinders, introducing the gas into the catalyst, and exposing to the reaction heat. CONSTITUTION:The deactivated catalyst for purifying the exhaust gas from an internal-combustion engine is charged into an exhaust gas line of the internal- combustion engine, and the ignition of at least one cylinder is stopped while keeping the gas temp. at the inlet of the catalyst at 500-800 deg.C. The gaseous mixture of unburnt fuel and air of the cylinder is then introduced into said catalyst along with the combustion gas of other cylinders to regulate the gas temp. at the outlet of the catalyst to 800-1,100 deg.C. Said conditions are kept for 3min- 2hr continuously or intermittently. Consequently the activity of the deactivated titled catalyst can be regenerated effectively and easily.