The heterogeneously catalyzed epoxidation of commercial biodiesel with aqueous H2O2 as oxidizing agent has been studied using composite catalysts composed of microporous titanium silicalite (TS-1) as a reactive, and a polymer-based spherical activated carbon as sorptive functionality. The results were compared with the performance of a commercial TS-1 catalyst. The polymer-based spherical activated carbon was used either as a support or as exotemplate. The efficiency of the active titanium sites was four times higher in the composite catalyst than in the commercial TS-1 catalyst.