Method of controlling deactivation of denitrating catalyst

Details Method of controlling deactivation of denitrating catalyst Method of controlling deactivation of denitrating catalyst

1987-08-17

1989-05-23

Favors, Edward G.

Furnaces

Process

Treating fuel constituent or combustion product

44505, 44641, 110342, 110347, F23J 1100

Patent

active

048319422

ABSTRACT:
The deactivation of a denitrating catalyst that is caused by exhaust gas dust in a boiler, a furnace or the like which employs a fossil fuel, particularly pulverized coal, can be controlled with excellent results by adding to a fuel at a mill installed in a coal fuel line or at a point upstream of the mill at least one iron compound in a small amount in the form of an aqueous solution, or a powder or water slurry containing coal particles, or in case of employing pulverized coal or heavy oil as a fuel by adding a mixture of an iron compound, a vanadium compound and a tungsten compound, said mixture being in the form of powder, a water slurry or an oil slurry of powder, or an aqueous solution.

REFERENCES:
patent: 4173454 (1979-11-01), Heins
patent: 4381718 (1983-05-01), Carver et al.
patent: 4388877 (1983-06-01), Molayem et al.
patent: 4572085 (1986-02-01), Hepworth
Patent Abstracts of Japan, vol. 9, No. 175, Jul. 19, 1985, "Method for Improving Fuel Quality".
Patent Abstracts of Japan, vol. 10, No. 63, Mar. 13, 1986, "Treatment of Denitration Catalyst".
Patent Abstracts of Japan, vol. 8, No. 138, Jun. 27, 1984, "Activating Method of Denitration Catalyst".
Patent Abstracts of Japan, vol. 9, No. 171, Jul. 16, 1985, "Method of Preventing Deterioration of Catalyst for Removing Nitrogen Oxide".

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