Journal
ENERGY
Volume 103, Issue -, Pages 205-214Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2016.02.055
Keywords
Pyrolysis; Bio-oil; Catalyst; Microalgae; Ceria; Nickel
Categories
Funding
- Centre for Innovation in Carbon Capture and Storage (CICCS)
- Heriot-Watt University (EPSRC) [EP/F012098/2]
- Scientific and Technological Research Council of Turkey (TUBITAK) [2219]
- EPSRC [EP/F012098/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F012098/2] Funding Source: researchfish
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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. Biooil yield was found to be higher in presence of Ni-Ce/Al2O3 and Ni-C/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%). H-1 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. (C) 2016 Elsevier Ltd. All rights reserved.
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