초록 ▼

An apparatus and a method for enhancing the rate of a chemical reaction in a gas stream. The apparatus includes at least one heterogeneous catalyst having an upstream end and a downstream end, and at least one surface having a plurality of catalytically active sites on the surface, where the catalys

An apparatus and a method for enhancing the rate of a chemical reaction in a gas stream. The apparatus includes at least one heterogeneous catalyst having an upstream end and a downstream end, and at least one surface having a plurality of catalytically active sites on the surface, where the catalyst is positioned so that at least a portion of the gas stream contacts at least a portion of the catalytically active sites on the surface. At least one device for producing radicals or other active species from at least one of water vapor or other gaseous species, such as a corona discharge device or a UV light source is used to produce radicals or other active species, which are introduced into the gas stream at a position upstream of the downstream end of the catalyst. The radicals or other active species are introduced in an amount sufficient to reduce or eliminate poisoning of the catalyst by catalyst poisons, such as sulfur, sulfur containing compounds, phosphorous, phosphorous containing compounds, and carbon.

대표청구항 ▼

[ What is claimed:] [1.] An apparatus for enhancing the rate of a chemical reaction in a gas stream, the apparatus comprising:at least one heterogeneous catalyst having an upstream end and a downstream end, and at least one surface having a plurality of catalytically active sites on the surface the

[ What is claimed:] [1.] An apparatus for enhancing the rate of a chemical reaction in a gas stream, the apparatus comprising:at least one heterogeneous catalyst having an upstream end and a downstream end, and at least one surface having a plurality of catalytically active sites on the surface the catalyst positioned such that at least a portion of the gas stream contacts at least a portion of the catalytically active sites on the surface; andat least one device for producing radicals or other active species from at least one of water vapor or other gaseous species, such that the radicals or other active species are introduced into the gas stream at a position upstream of the downstream end of the catalyst, wherein the device for producing radicals comprises a corona discharge device comprising at least a first electrode, at least a second electrode positioned a distance from the first electrode, and a dielectric material positioned between the first electrode and the second electrode; anda high frequency power supply having an operational frequency of at least about 1,000 Hz adapted to provide electrical power to the corona discharge device, andat least a portion of the gas stream is exposed to the corona discharge to produce the radicals in the gas stream.