Expanded flue gas analysis in connection with catalytic reduction of formaldehyde from gas engines

Direct use of oxidation catalysts for removal of formaldehyde from gas engine flue gas seems to be the most promising technology considering the emission reductions achieved and the plant costs. Environmental documentation was provided for field tests of direct catalysts at four gas engine plants in Denmark. The catalysts were tested during approx. two years of normal plant operations. The project results are included directly as background material for the work currently performed by the Danish Environmental Protection Agency to determine a revised emission threshold for gas engine formaldehyde.