A fuel tank inerting system is disclosed. In addition to a fuel tank, the system includes a catalytic reactor with an inlet, an outlet, a reactive flow path between the inlet and the outlet, and a catalyst on the reactive flow path. The catalytic reactor is arranged to receive fuel from the fuel tank and air from an air source, and to react the fuel and air along the reactive flow path to generate an inert gas. The system also includes an inert gas flow path from the catalytic reactor to the fuel tank. The system also includes (a) an air distributor in the catalytic reactor arranged to distribute air along the reactive flow path, or (b) non-uniform catalyst loading or non-uniform catalyst composition along the reactive flow path, or both (a) and (b).

It is an object of the present invention to provide a photocatalyst-carrying mesh sheet which firmly supports anatase type titanium oxide as a photocatalyst to prevent peeling, and increases opportunities for contact with the photocatalyst to significantly improve a purification treatment efficiency provided by the photocatalyst and to suppress manufacturing cost. A photocatalyst-carrying mesh sheet (S1) is disclosed, which includes: a net-form titanium sheet (11) having a periodic pattern; a titanium oxide film (3) formed on a surface of the net-form titanium sheet (11); and an anatase type titanium oxide particle (4) supported on the titanium oxide film (3).

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

Embodiments of the present invention include a filter element for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst. The embodiments of the present invention also includes a system for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst; and a method using the system.

A composition of formula
Ce.sub.1-a-b-cN.sub.aM.sub.bD.sub.cO.sub.xI
wherein M stands for one or more elements from the group of alkaline metals, except sodium, N is Bi and/or Sb, D is present, or is not present, and if present is selected from one or more of Mg, Ca, Sr, Ba; Y, La, Pr, Nd, Sm, Gd, Er; Fe, Zr, Nb, Al; a is a number within the range of 0<a0.9, b is a number within the range of 0<b0.3, c is a number within the range of 0<c0.2, a plus b plus c is <1, and x is a number within the range of 1.2x2, and its use for exhaust gas aftertreatment systems of Diesel engines, gasoline combustion engines, lean burn engines and power plants.

Disclosed are a device and a method for degrading a gaseous organic pollutant through electrochemical process. The device includes an electrochemical reactor, where the electrochemical reactor includes a power supply, an anode, a cathode, a proton exchange membrane; and the proton exchange membrane is provided between the anode and the cathode, and the anode, the proton exchange membrane and the cathode are clamped, and the proton exchange membrane is a gas-permeable proton exchange membrane. The method is applied to the device, and includes: applying a direct current voltage between the cathode and the anode; and inputting a gas containing the gaseous organic pollutant from the anode. The gas containing the gaseous organic pollutant is degraded at the anode, and the degraded gas passes through the proton exchange membrane and the cathode in turn, and is discharged.

A photocatalyst including a first metal oxide; and a second metal oxide, wherein the first metal oxide is disposed on a surface of the second metal oxide, and wherein absorbance of the photocatalyst in a wavelength region of about 200 nanometers (nm) to about 600 nm is about 5% to about 50% greater than an absorbance of TiO.sub.2 in the wavelength region of about 200 nm to about 600 nm.

A process where a gas, containing SO.sub.2 and O.sub.2 is brought in contact with a mixture of from 95% vol. to 50% vol. of activated carbon catalyst and from 5% vol. to 50% vol. of an inert filler material, where the SO.sub.2 is converted to H.sub.2SO.sub.4 on the activated carbon catalyst and is then washed from the activated carbon catalyst to obtain a H.sub.2SO.sub.4 solution.

A method is disclosed in which a gas of hydrogen and nitrogen, or hydrogen and ammonia, or hydrogen, nitrogen, and ammonia, is introduced to a fluidized bed. The gas flows through the fluidized bed, and titanium dioxide particles are introduced to the fluidized bed to form a fluid mixture of the particles and gas in the fluidized bed. The particles are reacted with the gas in the fluid mixture to form particles including titanium dioxide and nitrogen. The particles can be disposed along an air flow path in operative communication with a light source for air treatment.

A process for the cleaning of a lean gas stream contaminated with volatile organic compounds and/or sulfur-containing compounds comprises the steps of adding ozone to the contaminated lean gas stream and contacting the resulting ozone-containing gas stream with a catalytic device at a temperature down to room temperature. Depending on the content of particulates in the lean gas stream, the catalytic device is either a monolithic catalyst or a catalytic bag filter, both impregnated with a catalyst containing one or more metal oxides, in which the metal is selected from vanadium, tungsten, palladium and platinum.