ADSORPTION OF CARBON-MONOXIDE ON ACTIVATED CARBON IMPREGNATED WITH METAL HALIDE

Activated carbon was impregnated with a metal halide, and adsorption a nd desorption characteristics of CO on the carbon were measured by fix ed-bed runs. It was found that the impregnation of PdCl2 or CuCl effec tively increases CO absorption. PdCl2/CuCl-impregnated carbons were ch aracterized by N-2 adsorption, SEM, EPMA, and XPS. Adsorption isotherm s of CO were also measured on these carbons, and the influence of the loading of impregnant on CO adsorption was experimentally elucidated. A selection procedure of impregnant was proposed based on the frontier orbital theory. The perturbation energy for molecular orbital mixing was estimated by the HOMO-LUMO interaction. CO adsorption on impregnat ed carbons was qualitatively interpreted using the perturbation energy , and the energy was regarded as an index of impregnant selection.