| 摘要 |
Method for removing nitrogen oxides NO<SUB>x </SUB>from gas mixtures that contain them, comprising contacting of the gas mixtures with an absorbent material comprising compounds having formula CaCuO<SUB>2 </SUB>and/or Ca<SUB>0.83</SUB>CuO<SUB>2 </SUB>providing X-ray diffraction powder spectra that correspond, for the CaCuO<SUB>2 </SUB>compound, to JCPDS card 48-197 and, for the Ca<SUB>0.83 </SUB>CuO<SUB>2</SUB>, to JCPDS card 48-212, or mixtures of said compounds or compositions containing them.
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