Investigation of the Effect of Drying Conditions on the Structural Properties and Catalytic Performance of Fe-Co-Ni/MgO Catalyst for Light Olefins Production from Syngas

Document Type : Original Article

Authors
Samaneh Vahid 1
Vajiheh yousefi 2
1 Assistant Professor, Department of Chemistry Education, Farhangian University, P.O. Box 14665-889, Tehran, Iran
2 Assistant Professor, Department of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran
Abstract
This study investigates Fe-Co-Ni catalysts prepared by co-precipitation for light olefin production via Fischer-Tropsch synthesis. The effects of drying temperature and time on MgO-supported Fe-Co-Ni catalyst performance were examined in a fixed-bed microreactor under constant conditions (GHSV = 5400 h-1, H2/CO = 1:3, pressure = 1 bar, temperature = 300°C). Drying at 120°C for 16 hours resulted in the highest catalytic activity for CO hydrogenation. Reduction behavior and surface area changes due to drying were analyzed by TPR and BET techniques, respectively. ANOVA analysis showed that both drying temperature and time significantly increased catalyst surface area (P < 0.05). However, only drying time significantly affected ethane selectivity, decreasing it with longer drying periods, while temperature had no significant impact. Optimal drying conditions were predicted at 156.5°C and 18.62 hours.

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Subjects

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  • Receive Date 01 June 2025
  • Revise Date 03 August 2025
  • Accept Date 04 September 2025