| abstract |
Exhaust from an NG fired stationary or non-stationary RICE, such as, for example, a lean burn RICE, is directed to a first oxidation catalyst, then to a second oxidation catalyst. The second oxidation catalyst is operated at a temperature higher than a minimum temperature required to oxidize formaldehyde (to CO 2 and H 2 O) and lower than a minimum temperature required to form formaldehyde, e.g., from CH 4 and O 2 . |