The　equilibrium　and　kinetics　of　adsorption　desulphurization　of　model　diesel　fuel　under　different　operating　conditions　were　investigated.　The　homogeneous　surface　diffusion　model　(HSDM)　and　pore　diffusion　model　(PDM)　taking　into　account　external　resistance　and　intraparticle　resistance　were　employed　to　represent　the　adsorption　kinetics　of　4,6-dimethyldibenzothiophene　(4,6-DMDBT).　The　equilibrium　isotherm　analysis　revealed　that　the　equilibrium　can　be　represented　well　by　the　Freundlich　model.　The　proposed　HSDM　model　and　PDM　model　can　successfully　describe　the　adsorption　of　4,6-DMDBT　for　different　operating　conditions　studied.　The　adsorbate　was　absorbed　rapidly　initially　because　the　adsorption　rate　at　the　beginning　was　dominated　only　by　external　diffusion.　The　Biot　numbers　proved　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　dosage,　while　pore　diffusion　played　a　significant　role　at　higher　initial　bulk　phase　concentration　and　more　adsorbent　dosage.　The　temperature　had　little　effect　on　the　diffusion　of　4,6-DMDBT　from　diesel　fuel.　The　estimated　values　of　pore　diffusion　coefficient　and　surface　diffusion　coefficient　were　1.55x10(-12)m(2)/s　and　5.855x10(-14)m(2)/s,　respectively.　They　were　independent　of　adsorbent　dosage,　initial　4,6-DMDBT　concentration,　and　temperature,　which　can　provide　guidance　for　fixed-bed　adsorption　columns　design　and　process　operation.