Process for reducing emissions of organic halogen compounds from incineration systems
AssigneeBabcock Deutsche Babcock Anlagen AG
InventorsHanspaul Hagenmaier, Gunther Mittelbach
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Abstract
The invention relates to a method for reducing the emission of organic products of incomplete combustion in the off-gases of incineration systems, wherein the off-gas containing the organic products is treated at a temperature from 150.degree. C. to 500.degree. C., under oxidative conditions, with a denox catalyst or a modified denox catalyst. A method is also provided wherein a denox catalyst may be utilized for removing organic products and nitrogen oxides from off-gases.
Claims21
A method of reducing emissions of organic halogen compounds in off-gas, comprising:
- directing said off-gas containing organic halogen compounds through a catalyst at a temperature of 150.degree. to 500.degree. C. wherein oxidative conditions are provided, said catalyst comprising 70 to 80 weight percent titanium dioxide (TiO.sub.2), and from 0.5 weight percent to 10 weight percent of at least one of the donors selected from the group consisting of tungsten trioxide (WO.sub.3) and vanadium pentoxide (V.sub.2 O.sub.5).
A method of reducing emissions of organic halogen compounds and nitrogen oxides in off-gas comprising:
- a first step of directing said off-gas containing organic halogen compounds and nitrogen oxides through a catalyst under oxidative conditions at a temperature of from about 150.degree. to 500.degree. C. thereby substantially diminishing organic products in said off-gas;
- and
- a second step consisting of directing said off-gas previously subjected to said first step through said catalyst under reducing conditions at a temperature of from about 150.degree. to 300.degree. C. thereby substantially diminishing nitrogen oxides in said off-gas, wherein said catalyst comprises 70 to 80 weight percent titanium dioxide (TiO.sub.2), and from 0.5 weight percent to 10 weight percent of at least one of the donors selected from the group consisting of tungsten trioxide (WO.sub.3) and vanadium pentoxide (V.sub.2 O.sub.5).
A method of reducing emissions of organic halogen compounds and nitrogen oxides in off-gas comprising:
- a first step consisting of directing said off-gas containing organic halogen compounds and nitrogen oxides through a catalyst under reducing conditions at a temperature of from about 150.degree. to 300.degree. C. thereby substantially diminishing nitrogen oxides from said off-gas;
- and
- a second step consisting of directing said off-gas previously subjected to said first step through said catalyst under oxidative conditions at a temperature of from about 150.degree. to 500.degree. C. thereby substantially diminishing organic products in said off-gas, wherein said catalyst comprises 70 to 80 weight percent titanium dioxide (TiO.sub.2), and from 0.5 weight percent to 10 weight percent of at least one of the donors selected from the group consisting of tungsten trioxide (WO.sub.3) and vanadium pentoxide (V.sub.2 O.sub.5).
Dependencies are inferred from the claim text.