Adsorption/desorption tests and infrared (IR) absorption analysis, using simulated gas mixtures, were conducted. The adsorbent used was a Mn–Cu mixed oxide. For the adsorption/desorption test, gas mixtures composed of NO, NO₂, O₂, and H₂O, balanced with N₂, were fed to the adsorbent pellets at 100°C in the adsorption process. In the subsequent desorption process, the temperature of the adsorbent was elevated to 300°C, N₂ was used as the carrier gas, and the desorbed gas compositions were determined. For the IR absorption analysis, the above-mentioned gas mixtures were fed to the ground Mn–Cu mixed oxide, after which the powder samples were analyzed by the attenuated total reflection method. It was found that the NO₂ adsorption presented larger capacity and an increase in the formation of a surface compound that desorbs at temperatures as low as 150°C, than the adsorption of the NO and O₂ mixture. The IR absorption analysis suggested that these results could be attributed to the larger fraction of monodentate nitrates, as an adsorption state, in the case of the NO₂ adsorption. Water vapor contained in the gas mixture increased the NO₂ adsorption capacity by forming a surface compound similar to manganese nitrate hydrate.

使用模拟气体混合物进行了吸附/解吸测试和红外（IR）吸收分析。所使用的吸附剂是Mn-Cu混合氧化物。为了进行吸附/脱附测试，将由NO，NO ₂，O ₂和H ₂ O与N ₂平衡组成的混合气体在100℃下送入吸附剂颗粒中。吸附过程中的℃。在随后的解吸过程中，吸附剂的温度升至300℃下，将N ₂用作载气，并确定解吸的气体组成。对于红外吸收分析，将上述气体混合物送入研磨的Mn-Cu混合氧化物中，然后通过衰减全反射法分析粉末样品。发现NO _2的吸附容量更大，并且在低至150的温度下解吸的表面化合物的形成增加°C，则比NO和O ₂混合物的吸附量大。IR吸收分析表明，在NO ₂吸附的情况下，这些结果可以归因于较大比例的单齿硝酸盐作为吸附状态。气体混合物中所含的水蒸气通过形成类似于硝酸锰水合物的表面化合物而增加了NO _2的吸附能力。