Abstract
AbstractThe efficient conversion of syngas to aromatic hydrocarbons (STA) has attracted attention in recent years for its extensive utilization in the energy and defense sectors. In current study, the alloying of two active FT synthesis metal components (Fe−Co) was employed in Na‐FeMnCo/HZSM‐5 composite catalyst for STA process. Different calcination temperatures and Fe/Mn/Co molar ratios were modulated for harnessing the different Fe2O3/CoFe2O4/MnCo2O4 structures that possessed divergent structural, reduction, carburization and catalytic behaviors to give Fe3O4/FexC/CoxC reactive species. Herein, the effective inclusion of Co and Mn into Fe brought about the expedient geometric and electronic modulations for providing the homogenously distributed CoFe2O4 nanocrystals. This particular substitution of Fe played a vital role for tuning the density of oxygen vacancies, tailoring the reduction behavior of Fe‐Ox, giving the Fe−Co alloy structure, and adjusting the adsorption capabilities of catalytic surface that mainly dictate the concentration of active Fe5C2 phase. An escalated selectivity to olefinic intermediates and subsequent higher aromatics fractions (∼55 %) thus was imparted with an inhibited CO2 (21 %) generation by meliorating the different Fischer‐Tropsch/Aromatization reactions in stable CO conversion of ∼98 %.
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