The catalytic activity of Fe-containing SiBEA zeolites in Fischer–Tropsch synthesis

• In C-FexSiBEA zeolites different kinds of iron species are present.
• The Red-C-FexSiBEA zeolites are active catalysts of Fischer–Tropsch synthesis.
• Red-C-Fe20SiBEA is the highest active catalysts with CO conversion of 70%.
• The highest selectivity towards liquid hydrocarbons on this catalyst was of 71%.
• The deactivation of Red-C-FexSiBEA catalysts is related to coke formation.

This work is focused on catalytic activity of Red-C-FexSiBEA zeolites in Fischer–Tropsch synthesis. The Fe-containing zeolites were obtained by two-step post-synthesis method, which allowed incorporating the metal ions into zeolite framework and in this way to obtain materials with new physicochemical and catalytic properties. The TPR-H2 studies allowed to determine the reducibility of different kinds of iron species present in C-FexSiBEA zeolites. The catalytic investigations indicated that the most active catalyst in FTS is Red-C-Fe20SiBEA, which achieved the CO conversion of 70% and selectivity towards liquid products of 71%. The isoalkanes, n-alkanes, olefins and oxidative products (alcohols, ketones and aldehydes) were identified among of liquid products. The most probably reason of catalysts deactivation is coke formation, which amount, calculated on the base of DTG-DTA data, was 7% for Red-Fe4.0SiBEA, 20% for Red-C-Fe10SiBEA and 35% for Red-C-Fe20SiBEA.

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