Recebido em 31/12/10; aceito em 10/5/11; publicado na web em 8/7/11 POTASSIUM IODINE SUPPORTED ON MESOPOROUS MOLECULAR SIEVES (SBA-15 AND MCM-41) AS BASIC CATALYST FOR SYNTHESIS OF BIODIESEL. Iodide potassium incorporated on mesoporous molecular sieves (SBA-15 and MCM-41) was used as heterogeneous catalysts in the transesterification of sunflower oil under different conditions of reaction time and ratio catalyst/oil (w/w). The results have showed that the system supported in SBA-15 has been more active than the supported in MCM-41, promoting a conversion to methyl esters of 84.98%.

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