Effects of titania based catalysts on in-situ pyrolysis of Pavlova microalgae

Aysu, Tevfik; Ola, Oluwafunmilola; Maroto-Valer, M. Mercedes; Sanna, Aimaro

Abstract

Pavlova microalga was pyrolysed in presence of titania based catalysts in a fixed bed reactor at various temperatures. The effects of catalysts on Pavlova microalga pyrolysis were investigated. A large fraction of the starting energy (∼ 63–74% daf) was recovered in the bio-oils when the catalysts were used. The bio-oil yield was 20% higher in presence of Ni/TiO2 (22.55 wt%) at 500 °C. The High Heating Values of the produced bio-oils were in the range of ∼ 35–37 MJ/kg and suffered strong deoxygenation, with O content (% daf) diminished from 51 wt% to ∼ 9–12 wt%. The 1H Nuclear Magnetic Resounance and Gas Chromatography Mass Spectrometry suggested that the titania catalysts enlarged the aliphatics and aromatic compounds and decreased oxygenates in the bio-oils. Ni/TiO2 had the greatest activity in increasing aliphatic protons (60%) and decreasing coke formation. Its enhanced cracking activity was due to its higher availability on the catalyst surface, compared to Co and Ce, and to strong interaction between Ni and TiO2 support. Despite the fact that the bio-oils were partially de-nitrogenated, the N-content still represent a major limitation for their use as bio-fuels without further upgrading.

Citation

Aysu, T., Ola, O., Maroto-Valer, M. M., & Sanna, A. (2017). Effects of titania based catalysts on in-situ pyrolysis of Pavlova microalgae. Fuel Processing Technology, 166, 291-298. https://doi.org/10.1016/j.fuproc.2017.05.001

• Journal Article Type: Article
• Acceptance Date: May 1, 2017
• Online Publication Date: Jun 21, 2017
• Publication Date: 2017-11
• Deposit Date: May 4, 2020
• Publicly Available Date: Jun 2, 2020
• Journal: Fuel Processing Technology
• Print ISSN: 0378-3820
• Electronic ISSN: 1873-7188
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 166
• Pages: 291-298
• DOI: https://doi.org/10.1016/j.fuproc.2017.05.001
• Public URL: https://nottingham-repository.worktribe.com/output/4380936
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0378382017300358
• Additional Information: This article is maintained by: Elsevier; Article Title: Effects of titania based catalysts on in-situ pyrolysis of Pavlova microalgae; Journal Title: Fuel Processing Technology; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.fuproc.2017.05.001; Content Type: article; Copyright: © 2017 Published by Elsevier B.V.