A filtering system includes: a catalyst filter including a filter frame including a first surface and a second surface opposite to the first surface, and a photocatalyst layer provided on the second surface of the filter frame; a light source unit configured to irradiate light for activating the photocatalyst layer; and a plurality of waveguides inserted into at least some of a plurality of channels, respectively, to increase light transmission into the at least some of the plurality of channels of the catalyst filter.

An electronic apparatus capable of controlling the air purification performance of a photocatalytic filter according to an air volume of a blowing fan and a concentration of a specific gas. An electronic apparatus having a deodorizing performance recovery function of a photocatalytic filter. The electronic apparatus includes a blowing fan, a filter apparatus configured to purify air introduced by the blowing fan and a controller configured to adjust a current applied to the filter apparatus, wherein the filter apparatus comprises a light emitting module to which a plurality of light emitting portions configured to output ultraviolet light is mounted, a photocatalytic filter provided to face the light emitting portion and a support frame configured to support the light emitting module and the photocatalytic filter to be apart from each other by a predetermined distance.

In one embodiment, a process for the purification of CO.sub.2 from chlorinated and non-chlorinated hydrocarbons, comprising: contacting a CO.sub.2 stream with a metal oxide catalyst, wherein the stream comprises the CO.sub.2 and impurities comprising the non-chlorinated hydrocarbons and the chlorinated hydrocarbons; interacting the impurities with the catalyst to form additional CO.sub.2 and metal chloride; and regenerating the catalyst by contacting the metal chloride with an oxygen containing gas stream. In another embodiment, a process for the purification of CO.sub.2 from chlorinated hydrocarbons and non-chlorinated hydrocarbons, comprising: contacting a CO.sub.2 stream with a metal oxide catalyst, wherein the CO.sub.2 stream comprises the CO.sub.2 and impurities comprising the non-chlorinated hydrocarbons and the chlorinated hydrocarbons; oxidizing the impurities with catalyst oxygen to form additional CO.sub.2 and converting the chlorine to metal chloride; and regenerating the catalyst by contacting the metal chloride with an oxygen containing gas stream.

A photocatalytic honeycomb assembly and a photocatalytic purification apparatus, which can maximally increase a contact area between polluted air and a photocatalyst while maximally ensuring that the surface of the photocatalyst receives sufficient irradiation of ultraviolet light, and can also make the flow resistance to air flowing in a channel meet requirements in the field of ventilation systems which have high requirements on flow resistance. The photocatalytic honeycomb assembly is formed of one or more photocatalytic honeycomb cores and a photocatalytic honeycomb assembly housing. The one or more photocatalytic honeycomb cores are arranged in a honeycomb form. The photocatalytic honeycomb core is formed of three or more basic core units and a light guide member that is Y-shaped in an end view.

The present invention provides a photocatalytic composition comprising: a photocatalyst; and an adsorbent material.

These embodiments relate to a method of attaching photocatalytic materials to inorganic surfaces. A method is described wherein metal hydroxide is converted to metal oxide, creating metal oxide linkages to attach photocatalysts to an inorganic surface. The photocatalyst attached inorganic material is useful in products that can partially or fully oxidize certain volatile organic compounds from a gas or liquid stream.

An apparatus (10) for production of water from atmospheric air comprises a condensation unit (20) comprising: an inlet opening (21) of the moist air with a dew point of lower than 0 C., an outlet opening (22) of the dehumidified air, at least a ventilator (23) configured so as to force an air flow and enter through the inlet opening (21) and exit from the outlet opening (22), a heat N exchange plate (24), interposed between the inlet opening (21) and the outlet opening (22), so as to intercept the air flow and able to be crossed by the air flow, in which a refrigerating fluid of a refrigerating unit (30) circulates at a lower temperature than a dew point temperature of the air flow and at least a heating element configured so as to heat the heat exchange plate (24) for defrosting the ice condensed thereon.

A gas treatment device includes a plasma-generating unit and a catalyst medium. The plasma-generating unit is provided with at least a flow channel through which a gas to be treated flows; and a power-supply unit for supplying electrical power, a first electrode, a second electrode and a dielectric material arranged inside the flow channel. A voltage is impressed between the first electrode and the second electrode by the power-supply unit and electrical discharging is caused to occur, whereby plasma is generated. The catalyst medium is adapted for accelerating a reaction with the gas to be treated and is provided in a position where the plasma generated by the plasma-generating unit inside the flow channel is present, and the catalyst medium has metallic catalytic particles present on an inorganic substance.

Methods for the heat treatment of a material flow and the cleaning of resulting exhaust gases are disclosed. The material flow may be preheated in a preheating zone, burned in a sintering zone, and cooled in a cooling zone. Exhaust gases of the sintering zone may flow through a preheater and be used for preheating the material flow. The exhaust gases leaving the preheater may be cooled at least partially in a comminuting device in interconnected operation or at least partially in a cooling device in direct operation. Exhaust gases may then be at least partly dedusted in a dust filter. A temperature of the dedusted exhaust gas may then be raised before the exhaust gas is cleaned of pollutants in at least one catalyst. A temperature at which the exhaust gases flow through the catalyst in direct operation may be higher, at least in phases, than a temperature at which the exhaust gases flow through the catalyst in interconnected operation.

Embodiments of the invention include a filtration element. In an embodiment, the invention includes a filtration element for an airplane cabin that includes a first media portion upstream from a second media portion. The first media portion can include activated carbon. The second media portion can include a catalyst material. Other embodiments are also included herein.