| 摘要 |
PURPOSE: To economically treat a gas contg. chlorinated organic compounds with an inexpensive catalyst having durable resistance to impurity by allowing the gas to contact with an oxide catalyst contg. vanadium and tin at a specified temp. in the presence of a specified amount of oxygen. CONSTITUTION: In this method, a gas contg. chlorinated organic compounds such as dioxin is allowed to contact with an oxide catalyst contg. vanadium and tin at 100 to 500 deg.C in the presence of 0.5 to 25vol.% oxygen. This oxide catalyst is prepared by depositing 0.5 to 50wt.% vanadium oxide and 0.1 to 50wt.% tin oxide on a titania carrier. Since the catalyst is excellent particularly in resistance to sulfur oxide poisoning and also inexpensive, chlorinated organic compounds can be decomposed with economical advantage by using this catalyst. Further, in addition to these catalyst components, e.g. molybdenum or the like is optionally used as the third component of the catalyst. At this time, the blending ratio of molybdenum to tin is normally <=40wt.% and preferably <=20wt.%. As the carrier, well-known silica, alumina, or the like may be used, however, the use of titania is preferred. |
