Selective catalytic reduction of nitrogen oxides using a ferroce

Details Selective catalytic reduction of nitrogen oxides using a ferroce Selective catalytic reduction of nitrogen oxides using a ferroce

1994-07-07

1996-01-09

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

C01B 2104

Patent

active

054826926

ABSTRACT:
An exhaust gas treatment process useful for the removal of nitrogen oxides using an iron impregnated zeolite as the catalyst and ammonia as a reducing agent. It is desired to extend the effective temperature range for the selective catalytic reduction (SCR) of nitrogen oxides below about 400.degree. C. This is accomplished in the instant invention through the use of an intermediate pore size zeolite, such as ZSM-5, based catalyst which has been ferrocene treated to substantially incorporate iron into its pores. The catalyst may also be hydrothermally treated at least once, if desired.

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