This　study　describes　an　experimental　investigation　comparing　the　effects　of　two　catalysts　(ZSM-5　and　Zeolite　Y)　on　intermediate　pyrolysis.　The　catalysts　are　characterized　by　different　acidities,　expressed　by　silica-to-alumina　ratios　of　352　(ZSM-5)　and　26　(Zeolite　Y).　The　post-extraction　rapeseed　meal　was　pyrolysed　in　a　fixed-bed　furnace　at　a　temperature　of　500　degrees　C,　and　the　pyrolysis　products　(char,　liquid　phase,　and　pyro-gas)　were　char-acterized　in　detail.　The　catalysts　were　assessed　based　on　their　reusage　capability.　Five-fold　more　carbon　was　deposited　on　Zeolite　Y　than　on　ZSM-5　after　10-fold　use　during　the　pyrolysis　of　rapeseed　meal.　Moreover,　the　ultimate　analysis　of　the　catalysts　showed　increases　in　the　hydrogen　and　nitrogen　contents,　which　were　signifi-cantly　higher　for　Zeolite　Y　than　those　for　ZSM-5.　The　catalysts　showed　different　effects　on　the　properties　of　the　products.　Better-quality　pyro-gas　was　obtained　with　Zeolite　Y,　but　reusage　of　this　catalyst　resulted　in　decreases　in　the　hydrogen　and　carbon　oxide　concentrations.　Compared　to　Zeolite　Y,　ZSM-5　afforded　bio-oil　with　a　lower　oxygen　content.　Phenols　and　ketones　were　dominant　compounds　in　both　bio-oils.　Regeneration　of　Zeolite　Y　caused　to　increase　of　specific　surface　area.