Synthesis of heterogenized perfluorinated thiophen Pd(II) ve Rh(I) catalysts in supercritical carbondioxide medium and investigation of activities on the hydrogenation reactions

In this study, activities of perfluorinatedthiophene Pd(II) and Rh(I) catalysts heterogenized via immobilization on silica support were investigated in some olefins hydrogenations reactions. In the heterogenization of homogeneous catalysts and catalytic studies, environmetally friendyl reaction media scCO2 was used. SEM, XRF, TGA, BET methods were used to characterize of heterogenized catalysts (Si-SCOORh, Si-SCOOPd, Si-SCOSRh, Si-SCOSPd). In catalytic reactions, olefins having different chemical environment such as styren, 1-octen and cyclohexen are reduced using H2 gas. Catalytical effects of parameters such as temperature, H2 pressure, total pressure, substrat concentration on styren hydrogenation were investigated in detail. From the results were obtained that Si-SCOOPd catalyst is more effective than other catalysts in olefins hydrogenation. On the studies for catalyst recycle were observed that Si-SCOOPd, Si-SCOORh, Si-SCOSPd catalysts have high activity for at least 5 cycles.