A　comparative　study　of　adsorption　dynamic　processes　in　a　batch　adsorber　illustrates,　among　spherical,　planar　and　cylindrical　adsorbents,　the　spherical　geometry　to　be　the　most　favorable　and　the　planar　geometry　to　be　the　most　unfavorable.　Concentration-dependent　surface　diffusivities,　involving　both　intraparticle　surface　diffusion　and　film　mass　transfer,　are　assumed.　Under　some　simplifications,　the　basic　equations　for　stirred　tank　adsorption　are　formulated.　Solutions　to　these　equations　imply　that　the　rate　of　adsorption　will　increase　as　the　shape　factor　increases　for　all　cases,　indicating　that　there　is　a　minimum　of　surface　energy　for　the　sphere　among　the　three　shapes,　and　is　thus　most　favorable.