Adsorption of NO on alumina-supported oxides and oxide-hydroxides of manganese.
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 gamma-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 Mn3+ ions on the surface of the support is probably responsible for the enhanced adsorption capacity.
Spasova
I
I
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria. ispasova@svr.igic.bas.bg
Nikolov
P
P
Mehandjiev
D
D
D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D008280:Magnetics; D008345:Manganese / Q000737:chemistry*; D009569:Nitric Oxide / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature
D006878:Hydroxides; D009569:Nitric Oxide; D008345:Manganese; D000537:Aluminum Oxide