Abstract
The adsorption capacity for NO of alumina-supported oxides and oxide–hydroxides of manganese have been studied. Two series of samples have been prepared by precipitation on γ-alumina and appropriate thermal treatment. The samples have been characterized by adsorption methods, magnetic methods, electronic paramagnetic resonance (EPR), transient response technique, and temperature-programmed desorption (TPD). The influence of the concentration of the initial manganese-containing solution has been investigated. The sample, prepared with a solution with Mn concentration of 4 g/100 ml, has been shown to be the best adsorbent for NO under the conditions of the experiment. It has been found that the presence mainly of Mn 3+ ions on the surface of the support is probably responsible for the enhanced adsorption capacity.
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