Alkylation of benzene with ethane over platinum-loaded zeolite catalyst

Alkylation of benzene with ethane was carried out using various zeolite cat alysts at temperature ranges of 400-550 degreesC. Loading of platinum onto zeolite greatly enhanced the yield of ethylbenzene. Among the zeolites test ed, H-ZSM5 and H-MCM22 showed catalytic activities. By contrast, mordenite did not yield ethylbenzene. Moderate acid strength distribution is the key factor of zeolite catalysts. Optimum catalyst and conditions for this react ion are as follows. The platinum-loaded H-ZSM5 catalyst containing 6.8 wt% Pt, at a reaction temperature of 500 degreesC, afforded ethylbenzene and st yrene formation rates of 14.2 and 0.8 mmol h(-1) g-cat(-1), respectively (b enzene-based yields 7.3 and 0.4%). In the alkylation of benzene with ethane over platinum-loaded H-ZSM5. ethene was initially formed from ethane over the metallic platinum. Then the alkylation proceeded over the acid sites of H-ZSM5.