| 摘要 |
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 (13) having an upstream end (12) a down stream end (22), 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 leas t one device (40) for producing radicals or other active species from at least one of water vapor or other gaseous species, such as a corona discharge devi ce (40) or a UV light source is used to produce radicals or other active specie s, which are introduced into the gas stream at a position upstream of the downstream end (22) of the catalyst. The radicals or other active species ar e introduced in an amount sufficient to reduce or eliminate poisoning of the catalyst (13) by catalyst poisons, such as sulfur, sulfur containing compounds, phosphorous, phosphorous containing compounds, and carbon.</SDOAB > |
