The　equilibrium　and　kinetics　of　adsorption　desulfurization　of　model　diesel　fuel　under　different　operating　conditions　were　studied.　The　homogeneous　surface　diffusion　model　(HSDM)　and　pore　diffusion　model　(PDM)　were　used　to　represent　the　adsorption　kinetics　of　46-dimethyldibenzothiophene　(46-DMDBT).　The　equilibrium　isotherm　analysis　revealed　that　the　equilibrium　can　be　represented　well　by　the　Freundlich　model.　The　proposed　HSDM　model　and　PDM　model　successfully　described　the　adsorption　of　46-DMDBT　under　various　operating　conditions　considered.　The　adsorbate　was　absorbed　quickly　initially　since　the　adsorption　rate　at　the　beginning　was　dominated　only　by　external　diffusion.　The　Biot　numbers　revealed　that　the　predominant　rate-controlling　step　was　intraparticle　diffusion.　Simultaneously　the　adsorption　rate　was　mainly　controlled　by　surface　diffusion　at　lower　initial　bulk　phase　concentration　and　less　adsorbent　concentration　while　pore　diffusion　played　an　important　role　at　higher　initial　bulk　phase　concentration　and　more　adsorbent　dosage.　The　estimated　values　of　pore　diffusion　coefficient　and　surface　diffusion　coefficient　were　independent　of　adsorbent　dosage　initial　46-DMDBT　concentration　and　temperature.