NOVELTY - Method for removing volatile organic compound from a gas, involves: (A) adding ozone to a gas comprising greater than or equal to 1 volatile organic compound forming a gas flow (505) containing greater than or equal to 1 volatile organic compound and ozone; and (B) passing the gas flow over a filter comprising an ozone oxidation catalyst (502) including a porous body having a surface and a catalytic noble metal composition (514) deposited on the surface of the porous body, where the catalytic noble metal composition comprises a mesoporous molecular sieve support (518) and a noble metal.    USE - For removing volatile organic compound from gas, where volatile organic compound(s) is/are selected from benzene, toluene, ethylbenzene, xylenes, 1,2,4-trimethylbenzene, acetone, ethyl alcohol, isopropyl alcohol, methacrylates ethyl acetate, tetrachloroethene, perchloroethene, trichloroethene, d-limonene, a-pinene, isoprene, tetrahydrofuran, cyclohexane, hexane, butane, heptane, pentane, 1,1,1-trichloroethane, methyl-iso-butyl ketone, methylene chloride, carbon tetrachloride, methyl ethyl ketone, 1,4-dichlorobenzene, naphthalene, trichlorofluoromethane, dichlorodifluoromethane, and formaldehyde (all claimed).    ADVANTAGE - The ozone oxidation performed using ozone oxidation catalyst for removal of gas-phase pollutants as volatile organic compound, shows increased efficiency while exhibiting low pressure drop across ozone oxidation catalyst. In ozone oxidation catalyst catalytic noble metal composition is applied to surface of porous body. The catalytic composition is formed from noble metal supported on mesoporous molecular sieve. Efficiency of ozone oxidation catalyst is enhanced by high hydrophobicity and absorption of pollutants by molecular sieve material. Further, porous body provides high surface area for distribution of catalytic noble metal composition, and provides large catalytic surface per unit volume over which gas flow can pass allowing for more efficient mixing of oxygen radicals and pollutants. Thus efficient catalyst for removal of pollutants from gas can be made in smaller packaging volume. High porosity decreases pressure drop across ozone oxidation catalyst, in gas flow moving across ozone oxidation catalyst, and provides smaller resistance to diffusion of pollutants across catalyst and higher space velocities of air flow through ozone oxidation catalyst. The ozone oxidation catalyst is capable of effectively catalyzing ozone oxidation at ambient temperatures.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an apparatus, comprising: a mixing component configured to add ozone to a gas comprising greater than or equal to 1 volatile organic compound forming a gas flow comprising greater than or equal to 1 volatile organic compound and the ozone; and a filtration component configured to direct the gas flow in a direction of a filter comprising an ozone oxidation catalyst comprising a porous body having a surface and a catalytic noble metal composition deposited on the surface of the porous body, where the catalytic noble metal composition comprises a mesoporous molecular sieve support and a noble metal; and    (2) a system, comprising: device for adding ozone to a gas comprising greater than or equal to 1 volatile organic compound forming a gas flow comprising greater than or equal to 1 volatile organic compound and the ozone; and device for passing the gas flow toward a filter comprising an ozone oxidation catalyst including a porous body having a surface and a catalytic noble metal composition deposited on the surface of the porous body, where the catalytic noble metal composition comprises a mesoporous molecular sieve support and a noble metal.    DESCRIPTION OF DRAWING(S) - The figures show schematics of ozone oxidation catalyst employed as filter inside of reactor.    Reactor chamber (501)    Ozone oxidation catalyst (502)    Inlet (503)    Outlet (504)    Direction of gas flow (505)    Ni metal foam (510)    Void spaces (512)    Catalytic composition (514)    Noble metal particles (516)    Mesoporous molecular sieve material (518)