Process for microwave air purification
OwnerChang Yul Chainventor
Life of this patent
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Abstract
A process of air purification occurs in the presence of activated carbon or its equivalent by decomposing adsorbed hazardous materials, such as volatile organic compounds, on the carbon surface by radiofrequency energy in the microwave range at near ambient conditions of temperature and pressure. Further microwave oxidation to nonhazardous gases occurs in the presence of an oxidation catalyst.
Claims20
A process for microwave purification of a gaseous stream with nonhazardous releases comprising:
- adsorbing impurities from said gaseous stream with an unsaturated bed of carbonaceous material until a substantially saturated bed occurs while producing a clean release gas;
- irradiating said substantially saturated bed with microwaves while a simultaneous sweep gas removes desorbed vapors;
- passing said sweep gas through an oxidation catalyst bed irradiated by microwaves, wherein said oxidation catalyst is deposited upon a microwave absorbing substrate, and wherein sufficient oxygen is added to obtain substantially complete oxidation of remaining vapors;
- passing said sweep gas through an alkaline solution scrubber to remove halide acids;
- and
- releasing the non-hazardous sweep gas.
A process for microwave air purification with environmentally acceptable releases comprising:
- adsorbing impurities from said air with an unsaturated bed of activated carbon until a substantially saturated bed occurs while producing clean air;
- irradiating said substantially saturated bed with microwaves while a simultaneous sweep gas removes desorbed vapors, where said sweep gas is selected from the group consisting of nitrogen, helium, and carbon dioxide;
- passing said sweep gas through an oxidation catalyst bed irradiated by microwaves, wherein said oxidation catalyst is deposited upon a substrate impregnated with silicon carbide, and wherein sufficient oxygen is added to obtain substantially complete oxidation of remaining vapors;
- passing said sweep gas through an alkaline solution scrubber to remove halide acids, and
- releasing the environmentally acceptable sweep gas.
A process for microwave halide-free air purification with environmentally acceptable releases comprising:
- adsorbing impurities from said air with an unsaturated bed of activated carbon until a substantially saturated bed occurs while producing clean air;
- irradiating said substantially saturated bed with microwaves while a simultaneous sweep gas removes desorbed vapors, where said sweep gas is selected from the group consisting of nitrogen, helium, and carbon dioxide;
- passing said sweep gas through an oxidation catalyst bed irradiated by microwaves, wherein said oxidation catalyst is deposited upon a substrate impregnated with silicon carbide, and wherein sufficient oxygen is added to obtain substantially complete oxidation of remaining vapors;
- and
- releasing the environmentally acceptable sweep gas.
Dependencies are inferred from the claim text.