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US 6,279,491 B1Granted
Method of treating exhaust gas
AssigneeNGK Insulators, Ltd.
InventorsTomonori Takahashi, Ralph T. Yang
Life of this patent
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Abstract
A method of removing dioxins from an exhaust gas, including the steps of introducing gamma-alumina into a stream of the dioxin-containing exhaust gas, and sorbing dioxins on the gamma-alumina.
Claims7
A method of removing dioxins from an exhaust gas, comprising the steps of:
- passing a stream of dioxin-containing exhaust gas through a filter to remove particulate matter therefrom;
- introducing gamma-alumina into the stream of dioxin-containing exhaust gas at a position downstream of the filter;
- and
- sorbing dioxins on or in the gamma-alumina.
1 more element
A method of removing dioxins from an exhaust gas, comprising the steps of:
- introducing gamma-alumina into a stream of the dioxin-containing exhaust gas at an exhaust gas temperature of 220° C.-300° C.;
- sorbing dioxins on or in the gamma-alumina;
- and
- heat-treating the gamma-alumina to dispose of the sorbed dioxins.
1 more element
Dependencies are inferred from the claim text.