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AssigneesMitsubishi Petrochemical Co., Ltd., Hitachi, Ltd., Babcock-Hitachi Kabushiki Kaisha
InventorsFumito Nakajima, Masato Takeuchi, Shimpei Matsuda, Shigeo Uno, Toshikatsu Mori, Yoshihisa Watanabe, Makoto Imanari
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A catalyst compositions for reducing nitrogen oxide comprising, as its chief ingredient, an intimate mixture of A. titanium (Ti) as component A, with B. at least one metal selected from the group consisting of molybdenum (Mo), tungsten (W), iron (Fe), vanadium (V), nickel (Ni), cobalt (Co), copper (Cu), chromium (Cr), and uranium (U), as component B, in the form of their oxides, and a process for reducing nitrogen oxides to nitrogen, which comprises contacting a gaseous mixture containing nitrogen oxides and molecular oxygen and a reducing gas with aforesaid catalyst compositions at an elevated temperature.
A process for reducing nitrogen oxides to nitrogen, which comprises adding ammonia, as substantially the sole reducing agent, to a gaseous mixture containing nitrogen oxides and molecular oxygen, and contacting the resulting gaseous mixture containing nitrogen oxides, molecular oxygen and ammonia, as substantially the sole reducing agent, at a temperature of 150.degree. to 550.degree. C. and at a space velocity of 1,000 to 100,000/hour with a catalyst composition consisting essentially of an intimate mixture of the following components in the following atomic ratios:
Dependencies are inferred from the claim text.