Valorization of walnut shell ash as a catalyst for biodiesel production
Authorized Users Only
2020
Authors
Miladinović, Marija R.Zdujić, Miodrag

Veljović, Đorđe
Krstić, Jugoslav

Banković-Ilić, Ivana B.
Veljković, Vlada B.

Stamenković, Olivera

Article (Published version)

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Show full item recordAbstract
The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.
Keywords:
Walnut shell / Sunflower oil / Methanolysis / Kinetics / Biodiesel / AshSource:
Renewable Energy, 2020, 147, 1033-1043Publisher:
- Elsevier
Projects:
- Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)
- Project 0-14-18 of the SASA Branch in Niš, Serbia
Note:
- The peer-reviewed version: https://cer.ihtm.bg.ac.rs/handle/123456789/3319
DOI: 10.1016/j.renene.2019.09.056
ISSN: 0960-1481