Conversion of nitrogen oxides in the presence of a catalyst supported on a mesh-like structure

A process for removing at least one nitrogen oxide from a fluid, comprising:

• forming a mesh structure of a porous material having internal pores and opposing sides, the average pore size of the material being sufficiently small that normally fluid flow is not exhibited through the porous material in the presence of negligible pressure differential thereacross on opposite surfaces, said mesh structure having a porosity of greater than about 85%, the opposing sides forming channels, each channel having a fluid receiving inlet and a fluid outlet, the received fluid for flowing through the channels along the surfaces of the material to and through said outlets from the respective inlets, the pores being in fluid communication with each other and with the channels externally the material at each said side, said material including turbulence generator means one piece therewith for creating a pressure differential across the opposing sides in said flowing fluids, said pressure differential for causing the flowing fluids to flow through the pores transversely through the material from one side to the other side of the material to promote contact between the fluids flowing on the opposite sides of the material and to promote contact with the material in the pores over essentially the entire surface of the material;
• and
• supporting a nitrogen oxide conversion catalyst on the material on the opposing surfaces and in said pores for reacting with said fluids as the received fluids flow through the channels and through the pores from one side to the opposite side of the material over essentially the entire surface of the material.