Fischer-Tropsch Synthesis Over Fe-Mn-Ce Ternary Nanocatalyst Supported on Γ-Al 2o 3: Assessment of Nanocatalyst Composition and Calcination Parameters
29 Pages Posted: 1 Jul 2020
Abstract
The effect of nanocatalyst composition and calcination parameters on the performance of the Fe-Mn-Ce ternary nanocatalysts supported on alumina granules in a laboratory fixed bed micro reactor have been evaluated. Nanocatalysts were synthesized by incipient wetness impregnation under vacuum method and used for hydrogenation of carbon monoxide via Fischer-Tropsch synthesis. The optimum nanocatalyst composition for production of light olefins (C 2 = - C 4 = ) from synthesis gas is 75wt%Fe- 20wt%Mn- 5 wt% Ce. The calcination parameters (temperature, time and atmosphere) were investigated and their effects on the structure and performance of the nanocatalysts were determined. The maximum ratio of olefins / (methane + paraffin) and the best activity and selectivity belonged to the nanocatalyst which was calcined in static air at 500 °C for 7 h. The nanocatalyst precursors and calcined samples (fresh and used) were characterized by XRD, N 2 physisorption, FE‒SEM, EDAX, MAP, TG, DSC, and H 2 - TPR. The present study results confirm that the structural, morphological and physic-chemical properties of the nanocatalyst have been impressed with metal species and calcination parameters.
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