Patent ID: 7972582

Claim:
A method of treating an exhaust gas containing a fluorine compound and CO, the method comprising: removing at least one of a powdery component, a water-soluble component and a hydrolytic component from the exhaust gas; then adding O 2 and H 2 O to the exhaust gas; then heating the exhaust gas to a temperature ranging from 700 to 900° C., while causing the exhaust gas to contact a contact-enhancing device to thereby produce turbulent flow of the exhaust gas, to decompose the fluorine compound having four or more carbon atoms and to oxidize CO in the exhaust gas without catalytic reaction; then decomposing the fluorine compound having three or less carbon atoms by catalytic reaction at a temperature ranging from 600 to 900° C.; and removing an acid gas produced when the fluorine compound is decomposed.