REGENERATION METHOD OF CATALYST FOR EXHAUST GAS PURIFICATION

摘要

PROBLEM TO BE SOLVED: To recover NOxstorage capacity by positively regenerating a sulfur-poisoned catalyst of NOxstorage reduction type for gas-engine exhaust emission control to recover NOxstorage power, and suppress CO-discharge at the time of regeneration treatment.

SOLUTION: The catalyst is treated at 550°C or higher in atmospheric exhaust-gas of excess-air ratio (λ) of 0.95-1.0. The treatment is performed by limiting the λ value in that range to attain the regeneration, and suppress the CO-discharge at the time of regeneration treatment.

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