Abstract
Abstract Three ZSM-5 zeolites with different crystal sizes were prepared and characterized by SEM, XRD, adsorption/desorption of N 2 , NH 3 -TPD, Py-IR and TG-DTA techniques. The results show that the acidic properties of HZSM-5 catalysts are very similar, but their textual properties are strongly influenced by crystal size. Their catalytic performances for the ethanol conversion to propylene were investigated in a continuous flow fixed-bed micro-reactor. In comparison with the large-sized HZSM-5, the small-sized HZSM-5 shows higher propylene selectivity and better stability, which reveals that decreasing the crystal size of zeolite is of benefit to ethanol conversion to propylene.
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