Removal of ozone from electrokinetic devices

An electrokinetic air propulsion device, comprising:

• a housing having an inlet and an outlet;
• a high voltage electrode and a propulsion electrode in said housing, wherein the high voltage electrode and the propulsion electrode are positioned between the inlet and the outlet and
• wherein the high voltage electrode and the propulsion electrode are configured to be at different potentials to generate air flow in the housing from the inlet to the outlet;
• and
• a shell secured to the housing and overlaying the outlet, wherein a porous support medium coated with ozone-destroying catalyst is disposed in the shell, the porous support medium having a cell density in the range 10 to 1000 cells/inch and having a size at least as large as size of the housing outlet such that the air flow from the outlet is forced through said porous support medium.