B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/349, 23/353
B01D 53/34 (2006.01) B01D 53/60 (2006.01)
Patent
CA 1039031
Abstract of the Disclosure NOX gas remaining in a purified exhaust, which has been de- sulfurized, in accordance with a publicly known method using coke oven gas, by washing the original exhaust containing SO2 and NOX with a water solution mainly consisting of ammonium sulfite con- centrated to about 30 percent by weight, the pH value and the temperature thereof being adjusted to 6.1 to 6.5 and 50° to 55°C respectively, can be reformed into harmless N2 by passing said desulfurized exhaust through a reducing catalyst at a temperature of 200° to 450°C, wherein ammonia gas naturally brought into said desulfurized exhaust from the washing solution acts as a reducing agent.
226545
Iwata Tomoji
Mizuno Minoru
LandOfFree
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