Iranian Journal of Chemical Engineering (IJChE)
Scientific Journal

Sulfur Treatment on the Catalytic Performance of Fe-Mn/ZSM-5 Nanocatalyst for Light Olefins Production by CO heydrogenation

Articles in Press

Document Type : Regular Article

Authors

Mohammad M Khodaei 1, 2
Mostafa Feyzi 1, 2
Jahangir M Shahmoradi 1

1 Faculty of Chemistry, Razi University, Kermanshah 67149-67346, Iran

2 Nanoscience & Nanotechnology Research Center (NNRC), Razi University, Kermanshah 67149-67346, Iran

10.22034/ijche.2026.589357.1602
Abstract
This study investigates the influence of sulfur treatment on the catalytic performance of Fe-Mn/ZSM-5 catalyst for the production of light olefins (C2–C4). K2S was employed as a promoter, with varying loading amounts examined to determine optimal concentration. The results demonstrate that the CH4 production and C2-C4 olefins selectivity were significantly affected by K2S content in the catalyst structure. The catalytic performance was evaluated under various operational conditions, including different H2/CO molar feed ratios, gas hourly space velocity (GHSV), reaction temperature, and total syngas pressure. The findings reveal that the optimal conditions for the Fe-Mn/ZSM-5 catalyst promoted with 7 wt.% K2S (based on total catalyst weight) are: reaction temperature of 260 °C, GHSV of 2400 h-1, H2/CO molar ratio of 2/1, and total pressure of 3 bar for light olefins (C2–C4)production and lower methane selectivity. The optimized catalyst was characterized using X-ray diffraction (XRD), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), and N2 physisorption techniques to elucidate the structural and textural properties that contribute to its enhanced catalytic performance.

Keywords

Fischer-Tropsch synthesis
Operational conditions
Characterization
Sulfur treatment
Subjects
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Iranian Journal of Chemical Engineering (IJChE)

Articles in Press, Accepted Manuscript
Available Online from 17 October 2026

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