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Catalytic pyrolysis of Tetraselmis and Isochrysis microalgae by nickel ceria based catalysts for hydrocarbon production

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  • Aysu, Tevfik
  • Abd Rahman, Nur Adilah
  • Sanna, Aimaro

Abstract

The catalytic pyrolysis of Tetraselmis sp. and Isochrysis sp. was carried out over ceria based catalysts in a fixed bed reactor. There was a clear effect of the catalysts on the product yields and quality, with the catalysts able to recover a large fraction of the starting microalgae energy (67–77%) in the bio-oils. Bio-oil yield was found to be higher in presence of Ni–Ce/Al2O3 and Ni–Ce/ZrO2 (26 wt.%). The produced bio-oils had HHVs (higher heating values) of 34–35 MJ/kg and suffered strong deoxygenation, with O level decreased from 40–41% in the starting microalgae to 9–15%. Also, 15–20% N removal was obtained using the ceria based catalysts. The oxygen contents in the bio-oils were remarkably lower than those previously obtained using ZSM-5 (25%) and other species without catalyst (17–24%). 1H NMR and GC–MS analysis showed that the bio-oils were enriched in aliphatics and depleted in N-compounds and water using the ceria based catalysts.

Suggested Citation

  • Aysu, Tevfik & Abd Rahman, Nur Adilah & Sanna, Aimaro, 2016. "Catalytic pyrolysis of Tetraselmis and Isochrysis microalgae by nickel ceria based catalysts for hydrocarbon production," Energy, Elsevier, vol. 103(C), pages 205-214.
    • Handle: RePEc:eee:energy:v:103:y:2016:i:c:p:205-214
    DOI: 10.1016/j.energy.2016.02.055
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    Cited by:

    1. Li, Fanghua & Sweeney, Daniel J. & Dai, Yanjun & Wang, Chi-Hwa, 2021. "Effect of novel Ni2P-loaded catalysts on algal pyrolysis bio-oil," Renewable and Sustainable Energy Reviews, Elsevier, vol. 151(C).
    2. Nur Adilah Abd Rahman & Javier Fermoso & Aimaro Sanna, 2020. "Stability of Li-LSX Zeolite in the Catalytic Pyrolysis of Non-Treated and Acid Pre-Treated Isochrysis sp. Microalgae," Energies, MDPI, vol. 13(4), pages 1-15, February.
    3. Bagnato, Giuseppe & Boulet, Florent & Sanna, Aimaro, 2019. "Effect of Li-LSX zeolite, NiCe/Al2O3 and NiCe/ZrO2 on the production of drop-in bio-fuels by pyrolysis and hydrotreating of Nannochloropsis and isochrysis microalgae," Energy, Elsevier, vol. 179(C), pages 199-213.

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