Disclosed herein are a catalyst composition, catalyst devices, and methods for removing formaldehyde, volatile organic compounds, and other pollutants from an air flow stream. The catalyst composition including manganese oxide, optionally one or more of alkali metals, alkaline earth metals, zinc, iron, binder, an inorganic oxide, or carbon.

Ionization systems configured with a catalyst-bearing sleeve provide improved filtration while keeping ozone levels within acceptable limits. Modular configurations provide for serviceability and replaceability. System controls monitor particulates, temperature, humidity, and other relevant factors and adjust an ionization level accordingly for optimal performance.

Ionization systems configured with a catalyst-bearing sleeve provide improved filtration while keeping ozone levels within acceptable limits. Modular configurations provide for serviceability and replaceability. System controls monitor particulates, temperature, humidity, and other relevant factors and adjust an ionization level accordingly for optimal performance.

Ionization systems configured with a catalyst-bearing sleeve provide improved filtration while keeping ozone levels within acceptable limits. Modular configurations provide for serviceability and replaceability. System controls monitor particulates, temperature, humidity, and other relevant factors and adjust an ionization level accordingly for optimal performance.

A process for the cleaning of a lean gas stream contaminated with volatile organic compounds (VOCs) and/or sulfur-containing compounds comprises the steps of adding ozone to the contaminated lean gas stream, subjecting the ozone-containing lean gas stream to ultraviolet irradiation, thereby transforming VOCs to particles, maintaining the irradiated gas stream in a stay zone for a sufficient time to allow aerosol particle growth, and passing the gas stream through a catalytic bag filter at a temperature down to room temperature to remove the formed particles and eliminate any remaining ozone. The bag filter has been made catalytic by impregnation with one or more metal oxides in which the metals are selected from V, W, Pd and Pt, supported on TiO.sub.2.

Ionization systems configured with a catalyst-bearing sleeve provide improved filtration while filtering ozone. Modular configurations provide for serviceability and replaceability. System controls may be used to monitor particulates, temperature, humidity, and other relevant factors and adjust an ionization level accordingly.

Disclosed in certain implementations is a catalysis composition that includes a metal catalyst and a support material impregnated with the metal catalyst.

The present invention relates to a continuous negative ion based indoor air and surface disinfection system (100) incorporating a nano-composite photo-catalyst that will activate photo-catalytic oxidation at a short-wavelength ultraviolet (UV) light energy. The continuous negative ion based indoor air and surface disinfection system incorporates at least one ultraviolet (UV) light source (104); a photo-catalytic oxidation material (106) which leads to production of oxygen and hydroxyl free radicals when illuminated with ultraviolet (UV) light source in the presence of water vapors. The photo-catalytic oxidation material (106) consisting of a mesh with TiO.sub.2 nano-spindled structures (202) placed over aluminium foil (204) coated with a composite mixture of ZnOTiO.sub.2.

Heat exchanger of an air-conditioning system of a cabin of a transport vehicle, comprising: a primary circuit supplied by a first air flow, a secondary circuit supplied by a second air flow, a casing defining an air-circulation enclosure, a primary circuit inlet box allowing entry into said air-circulation enclosure, and a primary circuit outlet box allowing exit from the air-circulation enclosure, characterized in that said inlet box is mounted removably on said casing, and in that it houses a three-dimensional structure forming a catalytic and/or adsorbent support for treating the air of said primary circuit, and a means for distributing said first air flow into said heat-exchange matrix.

Compositions including a matrix, methods of making such compositions, structures including such compositions, methods of disposing such compositions on a substrate; wherein the matrix includes: a plurality of polytetrafluroethylene fibrils formed from PTFE resin and a plurality of active particles.