The Potential of K3PO4, K2CO3, Na3PO4 and Na2CO3 as Reusable Alkaline Catalysts for Practical Application in Biodiesel Production
Fuel Processing Technology 2018
Kristaps Māliņš

K3PO4, K2CO3, Na3PO4and Na2CO3performance in biodiesel production by transesterification reaction of rapeseed oil (RO), recovery, behavior in polar alcohols (methanol, glycerol) and air during storage were studied. The catalysts were characterized by N2sorption analysis, XRF and FE-SEM. Potassium salts and NaOH used as reference have higher solubility in reaction mixture and activity on biodiesel production process, but significantly lower catalyst recovery and stability in air during storage than sodium salts. 88.2% of Na3PO4and 87.3% of Na2CO3initial amounts were recovered after transesterification process by developed method. Rest of Na2CO3(11.8%) dissolved in crude glycerol can be extracted from its ashes. The effects of molar ratio of RO to methanol (1/5–1/14), reaction temperature (40–65 °C) and catalyst amount (1–7%) on Na3PO4and Na2CO3catalyzed transesterification were investigated. These salts can be reused up to second and fifth run without regeneration to reach >96% of rapeseed methyl ester (RME) content in biodiesel sample under recommended conditions.


Atslēgas vārdi
Alkaline catalysts, Biodiesel, Fatty acid methyl esters, Rapeseed oil, Transesterification
DOI
10.1016/j.fuproc.2018.07.017
Hipersaite
https://www.sciencedirect.com/science/article/pii/S0378382018310336?via%3Dihub

Māliņš, K. The Potential of K3PO4, K2CO3, Na3PO4 and Na2CO3 as Reusable Alkaline Catalysts for Practical Application in Biodiesel Production. Fuel Processing Technology, 2018, Vol.179, 302.-312.lpp. ISSN 0378-3820. Pieejams: doi:10.1016/j.fuproc.2018.07.017

Publikācijas valoda
English (en)
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