In this work a microwave source has been employed for the regeneration of a ceramic foam used as a filter for soot trapping in the exhaust of a gas-oil burner. A specially designed single mode microwave cavity with a parabolie-like profile of the electromagnetic field has been constructed. We have found that a combined system of catalytic filter and microwave heating is able to perform filter regeneration at the temperature typical of diesel exhaust. In particular, the presence of catalyst assures lower soot ignition temperature, higher selectivity to CO_2, higher soot combustion rate and higher microwave energy saving.
展开▼
