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Effect of K and CeO2 promoters on the activity of Co/SiO2 catalyst for liquid fuel production from syngas

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  • Khobragade, Murnal
  • Majhi, Sachchit
  • Pant, K.K.

Abstract

Effect of potassium and ceria promotion on the activity and selectivity of Co/SiO2 catalyst was investigated for CO hydrogenation in a high pressure reactor. Five different SiO2 supported cobalt catalysts promoted with K and CeO2 were synthesised by sol gel followed and wet impregnation. These catalysts were characterised by BET surface area, pore volume, TGA, TPR, SEM, TEM, and chemisorptions methods. The cobalt particles were well dispersed in sol gel method in presence of complexing agent. The major phase obtained was Co3O4 and the average metal particle size as determined from the hydrogen chemisorptions and TEM studies varied from 20 to 60nm. The performance of these catalysts were compared at 250°C and 20bar pressure and at a weight hourly space time of (W/Fo) 1000kg(catalyst)s/Nm3. Incorporation of K and CeO2 significantly influenced the catalyst reducibility due to increased metal support interaction. The CO conversion and C5+ selectivity were highest for ceria doped Co/SiO2 catalyst. Both K and CeO2 promoted Co/SiO2 were found active and stable for the FTS reaction, however compared to K promoted catalyst ceria promoted catalyst notably improved the C5+ selectivity, while suppressing the CH4 and coke formation.

Suggested Citation

  • Khobragade, Murnal & Majhi, Sachchit & Pant, K.K., 2012. "Effect of K and CeO2 promoters on the activity of Co/SiO2 catalyst for liquid fuel production from syngas," Applied Energy, Elsevier, vol. 94(C), pages 385-394.
    • Handle: RePEc:eee:appene:v:94:y:2012:i:c:p:385-394
    DOI: 10.1016/j.apenergy.2012.02.002
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    References listed on IDEAS

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    1. Stelmachowski, Marek & Nowicki, Lech, 2003. "Fuel from the synthesis gas--the role of process engineering," Applied Energy, Elsevier, vol. 74(1-2), pages 85-93, January.
    2. Choudhary, V. R. & Mamman, A. S., 2000. "Energy efficient conversion of methane to syngas over NiO-MgO solid solution," Applied Energy, Elsevier, vol. 66(2), pages 161-175, June.
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    2. Mohammed Al-asadi & Norbert Miskolczi, 2020. "High Temperature Pyrolysis of Municipal Plastic Waste Using Me/Ni/ZSM-5 Catalysts: The Effect of Metal/Nickel Ratio," Energies, MDPI, vol. 13(5), pages 1-11, March.
    3. Maciel, Cristhiane Guimarães & Silva, Tatiana de Freitas & Assaf, Elisabete Moreira & Assaf, José Mansur, 2013. "Hydrogen production and purification from the water–gas shift reaction on CuO/CeO2–TiO2 catalysts," Applied Energy, Elsevier, vol. 112(C), pages 52-59.
    4. Ding, Mingyue & Tu, Junling & Qiu, Minghuang & Wang, Tiejun & Ma, Longlong & Li, Yuping, 2015. "Impact of potassium promoter on Cu–Fe based mixed alcohols synthesis catalyst," Applied Energy, Elsevier, vol. 138(C), pages 584-589.
    5. Das, Satyen Kumar & Mohanty, Pravakar & Majhi, Sachchit & Pant, Kamal Kishore, 2013. "CO-hydrogenation over silica supported iron based catalysts: Influence of potassium loading," Applied Energy, Elsevier, vol. 111(C), pages 267-276.

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