Transformation of light alkenes over templated and non-templated ZSM-5 zeolites Original Research Article

The transformations of ethene, propene and i-butene over templated (CVN) and non-templated (CVM) ZSM-5 zeolites at 350°C were examined. The initial activity values obtained for the conversion of C2H4 were significantly higher with H-CVM than with H-CVN zeolite, in accordance with the stronger acidity of its sites. In contrast, for the transformation of C3H6 and i-C4H8 the opposite order was observed: the more acidic catalyst presents a lower activity. It was also observed that, in the case of CVM, the sodium-exchanged CVM samples have higher activities than the H form. These observations can be related to the extremely high acidity of the CVM samples.