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Revista de Chimie (Rev. Chim.), Year 2014, Volume 65, Issue 12,





RALUCA PROSCANU, RODICA GANEA, DIANA CURSARU, VASILE MATEI, GABRIEL VASILIEVICI
Effect of Introduction of Lanthanum Cations in ZSM-5 Crystallization Step on Ethanol Conversion to Hydrocarbons

Abstract:

In this study, HZSM-5 and La-HZSM-5 catalysts were synthesized and experienced in ethanol conversion process to hydrocarbons. The physicochemical properties of catalysts were characterized by X-Ray diffraction (XRD), Fourrier Transformed-Infra Red (FT-IR), thermogravimetric and acidity measurements. Two sets of catalytic tests with unmodified and La modified HZSM-5 have been performed aiming at distinguishing the effect of lanthanum cation addition in zeolite synthesis mixture on the catalyst selectivity. The experimental result demonstrated that the addition of lanthanum results in modifying the catalytic performance as compared to unmodified HZSM-5 zeolite. The two catalysts prepared from unmodified and lanthanum modified ZSM-5 zeolite samples showed a remarkable difference in their selectivity. It was found that in the ethanol to hydrocarbons conversion process the La-HZSM-5 catalyst had a high selectivity in ethylene as compared to unmodified HZSM-5, the later leading to the formation of a wide range of gaseous and liquid hydrocarbons. Keywords: La-ZSM-5, ethanol, conversion, hydrocarbons


Issue: 2014, Volume 65, Issue 12
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