Abstract
Adsorbents and catalyst supports produced by loading different amounts of potassium acetate on alumina followed by calcination are characterized using IR spectroscopy and TPD. CO, CO 2 and NO x adsorption is studied. Two different ranges of potassium loading on alumina are found, namely light and heavy doping corresponding to 1% and more than 3% K wt/wt, respectively. Light doping results in the weak adsorption of CO 2 as bicarbonate species and NO 2 as bidentate nitrates. Heavy doping results in the adsorption of CO 2 as bidentate carbonates and NO 2 as polydentate nitrate species. Three families of exposed K + ions are observed at increasing loading.
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