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Kazemnejad, Iraj, Feizbakhsh, Alireza, Niazi, Ali, Tavasoli, Ahmad. (1398). Highly dispersed cobalt Fischer–Tropsch synthesis catalysts supported on γ-Al2O3, CNTs, and graphene nanosheet using chemical vapor deposition. نشریه علمی پژوهشی دانشگاه آزاد اسلامی, 10(4), 321-333. doi: https://doi.org/10.1007/s40090-019-00195-9
Iraj Kazemnejad; Alireza Feizbakhsh; Ali Niazi; Ahmad Tavasoli. "Highly dispersed cobalt Fischer–Tropsch synthesis catalysts supported on γ-Al2O3, CNTs, and graphene nanosheet using chemical vapor deposition". نشریه علمی پژوهشی دانشگاه آزاد اسلامی, 10, 4, 1398, 321-333. doi: https://doi.org/10.1007/s40090-019-00195-9
Kazemnejad, Iraj, Feizbakhsh, Alireza, Niazi, Ali, Tavasoli, Ahmad. (1398). 'Highly dispersed cobalt Fischer–Tropsch synthesis catalysts supported on γ-Al2O3, CNTs, and graphene nanosheet using chemical vapor deposition', نشریه علمی پژوهشی دانشگاه آزاد اسلامی, 10(4), pp. 321-333. doi: https://doi.org/10.1007/s40090-019-00195-9
Kazemnejad, Iraj, Feizbakhsh, Alireza, Niazi, Ali, Tavasoli, Ahmad. Highly dispersed cobalt Fischer–Tropsch synthesis catalysts supported on γ-Al2O3, CNTs, and graphene nanosheet using chemical vapor deposition. نشریه علمی پژوهشی دانشگاه آزاد اسلامی, 1398; 10(4): 321-333. doi: https://doi.org/10.1007/s40090-019-00195-9

Highly dispersed cobalt Fischer–Tropsch synthesis catalysts supported on γ-Al2O3, CNTs, and graphene nanosheet using chemical vapor deposition

International Journal of Industrial Chemistry
دوره 10، شماره 4، اسفند 2019، صفحه 321-333
نوع مقاله: research article
شناسه دیجیتال (DOI): https://doi.org/10.1007/s40090-019-00195-9
نویسندگان
Iraj Kazemnejad1؛ Alireza Feizbakhsh* 1؛ Ali Niazi1؛ Ahmad Tavasoli2
1Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran
2School of Chemistry, College of Science, University of Tehran, Tehran, Iran
چکیده
Highly dispersed 15.0 wt% cobalt catalysts were prepared on γ-Al2O3, carbon nanotubes (CNTs), and graphene nanosheet (GNS) using chemical vapor deposition (CVD) procedure. The physico-chemical properties of the catalysts were studied by inductively coupled plasma (ICP), Brunauer–Emmett–Teller (BET), X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM), and temperature-programmed reduction (TPR) techniques, and the Fischer–Tropsch synthesis (FTS) performance of the catalysts was assessed at 220 °C, 18 bar, H2/CO = 2 and feed flow rate of 45 ml/min g cat. Based on BET results, Co/GNS catalyst provided highest surface area in comparison to the other catalysts. XRD and FESEM results revealed that CVD method prepared smaller particles on GNS compared to the other supports and resulted in the most dispersed metal particles on GNS according to H2-chemisorption results. The performance of Co/Al2O3 catalyst prepared by CVD method was compared with conventional 15 wt% Co/Al2O3 catalyst prepared by impregnation method. The Co/Al2O3 catalyst prepared with CVD method showed 5.3% higher %CO conversion and 2.1% lower C5+ selectivity as compared with the Co/Al2O3 catalysts prepared by impregnation method. Among three catalysts prepared by CVD, Co/GNS showed higher %CO conversion of 78.4% and C5+ selectivity of 70.3%. Co/γ-Al2O3 catalyst showed higher stability.
کلیدواژه‌ها
Chemical vapor deposition · Cobalt · Dispersion · Activity · Selectivity
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تعداد مشاهده مقاله: 17


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