Stability of Li-LSX Zeolite in the Catalytic Pyrolysis of Non-Treated and Acid Pre-Treated Isochrysis sp. Microalgae
| Autor: | Aimaro Sanna, Javier Fermoso, Nur Adilah Abd Rahman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Control and Optimization
020209 energy Energy Engineering and Power Technology 02 engineering and technology Heterogeneous catalysis 01 natural sciences lcsh:Technology Catalysis li-lsx-zeolite 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Isochrysis Zeolite Engineering (miscellaneous) Deoxygenation microalgae pyrolysis biology ex-situ pyrolysis 010405 organic chemistry Renewable Energy Sustainability and the Environment Chemistry lcsh:T bio-oil upgrading deoxygenation Coke biology.organism_classification 0104 chemical sciences heterogeneous catalysis Yield (chemistry) Li-LSX-zeolite bio-fuels Pyrolysis Energy (miscellaneous) Nuclear chemistry |
| Zdroj: | Energies, Vol 13, Iss 4, p 959 (2020) Energies; Volume 13; Issue 4; Pages: 959 |
| ISSN: | 1996-1073 |
| Popis: | This paper investigates the use of Li-LSX-zeolite catalyst over three regeneration cycles in presence of non-treated and acid pre-treated Isochrysis sp. microalgae. The spent and regenerated catalysts were characterised by surface analysis, elemental analysis (EA), SEM-EDS, and XRD to correlate their properties with the bio-oil yield and quality. The acid pre-treatment removed alkali metals, reducing gas yield in favour of bio-oil, but, at the same time, led to catalyst deactivation by fouling. Differently, the non-treated microalgae resulted in a bio-oil enriched in C and H and depleted in O, compared to the pre-treated ones, denoting higher deoxygenation activity. After 3 pyrolysis/regeneration cycles, the analyses suggest that there are no major changes on catalyst using non-treated microalgae. Regeneration at 700 °C has been shown to be able to remove most of the coke without damaging the Li-LSX zeolite structure. In summary, Li-LSX zeolite was effective in maintaining deoxygenation activity over three cycles in the pyrolysis of non-treated Isochrysis microalgae, while the algae pre-treatment with sulphuric acid was detrimental on the catalyst activity. |
| Databáze: | OpenAIRE |
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