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Comparative, reusability and regeneration study of potassium oxide-based catalyst in deoxygenation reaction of WCO


R. S., R. M. Hafriz and I., Nor Shafizaha and Arifin, N. A. and A. H., Maisarah and A., Salmiaton and Shamsuddin, A. H. (2022) Comparative, reusability and regeneration study of potassium oxide-based catalyst in deoxygenation reaction of WCO. Energy Conversion and Management: X, 13. art. no. 100173. pp. 1-14. ISSN 2590-1745


In this work, the comparative study on the performance of K2O/SiO2 and calcined dolomite catalysts was conducted via deoxygenation of waste cooking oil (WCO). KSi catalyst has the potential as a deoxygenation catalyst due to mesoporous structure catalyst with high base properties which enhance oxygen removal. The result found that K2O/SiO2 catalyst could be used in the deoxygenation of WCO generating a high yield of pyrolysis oil as compared to thermal deoxygenation and calcined dolomite catalyst. Besides that, the reusability and regeneration of the K2O/SiO2 catalyst were evaluated in the deoxygenation reaction using WCO as a feedstock. Five consecutive runs of reusability test and three successive cycles with two regenerations were performed. The reusability and followed by regeneration tests were conducted at conditions: 30 min of reaction time, 390 ± 5 °C reaction temperature and 150 cm3/min of N2 flow rate. The liquid products obtained from each cycle were analyzed by GC–MS. The deoxygenation of WCO using K2O/SiO2 catalyst rendered higher selectivity towards diesel products (C13-C24). The K2O/SiO2 catalyst presented a good performance in reusability and regenerability test with only ∼19.3–22.4% dropped in pyrolysis oil yield after 5 consecutive runs and only ∼11.20–13.23% drop in diesel yield after regeneration. The results showed that K2O/SiO2 catalyst has tremendous stability in the deoxygenation of WCO into green diesel and could be the alternative deoxygenation base catalyst for the deoxygenation process.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.ecmx.2021.100173
Publisher: Elsevier
Keywords: Deoxygenation; Waste cooking oil (WCO); Green diesel; K2O/SiO2 catalyst; Reusability & regeneration
Depositing User: Ms. Nur Faseha Mohd Kadim
Date Deposited: 11 Sep 2023 08:07
Last Modified: 11 Sep 2023 08:07
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.ecmx.2021.100173
URI: http://psasir.upm.edu.my/id/eprint/100742
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