Method for removing nitrogen oxides NOx using a material absorbing said oxides
AssigneeSud-Chemie Catalysts Italia S.R.L.
InventorsEsterino Conca, Carlo Rubini, Guido Petrini
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Abstract
Method for removing nitrogen oxides NOx from gas mixtures that contain them, comprising contacting of the gas mixtures with an absorbent material comprising compounds having formula CaCuO2 and/or Ca0.83CuO2 providing X-ray diffraction powder spectra that correspond, for the CaCuO2 compound, to JCPDS card 48-197 and, for the Ca0.83 CuO2, to JCPDS card 48-212, or mixtures of said compounds or compositions containing them.
Claims18
A method for removing nitrogen oxides NOx from gas mixtures that contain them, comprising contacting of the gas mixtures with an absorbent material comprising compounds having formula CaCuO2 and/or Ca0.83CuO2 providing X-ray diffraction powder spectra that correspond, for the CaCuO2 compound, to JCPDS card 48-197 and, for the Ca0.83 CuO2, to JCPDS card 48-212, or mixtures of said compounds or compositions containing them.
A nitrogen oxides NOx absorbing material in which the Ca/Cu ratio is 0.83 and the Mn/Cu ratio varies from 0.1 to 0.9.
Dependencies are inferred from the claim text.