Abstract
Conversion of light naphtha to aromatics was studied using zeolitic catalysts. A zinc-aluminosilicate having MFI structure showed the lowest decline of activity because of its lowest coke-forming tendency. Effects of reaction pressure and regenerative operation on catalyst deactivation were studied. Operation at lower pressure actually enhanced its stability, in contrast to the well-known behavior of conventional reforming catalysts. The coke deposit on the catalyst was found to be increased at higher pressure. The long-cycle-time stability of zinc-aluminosilicates resulted in the design of a new process of light naphtha aromatization using a conventional fixed bed unit
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