Chiang Mai Journal of Science

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This research studies catalytic properties of  TS-1 modified Fe, Al, Co and V in the hydroxylation of benzene and alkyl benzene with hydrogen peroxide. The results show that adding Fe, Al, Co and V can increase the catalytic activity of  TS-1 on the hydroxylation of benzene in the following order Co-TS-1 > V-TS-1 > Fe-TS-1 > Al-TS-1 > TS-1. Further investigation reveals that the added metals improve the performance of  TS-1 by decreasing the adsorption of phenol on the TS-1 surface, thus prevent the blockage of the active site by the phenol formed. In addition, they also inhibit the decomposition of  H₂O₂ , thus providing more H₂O₂  for the reaction. For the hydroxylation of  toluene, it was found that the hydroxygroup can substitute at both ortho and para position producing o-cresol and p- resol respectively

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