Acid catalysed transesterification of animal waste fat

Proskova, A.; Kopicová, Z.; Kučera, Jiří; Škarková, L.

doi:10.17221/20/2008-rae

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…Comparing the results obtained in this work with the transesterification of RPF catalyzed with acid (Prošková et al 2009a) or base (Prošková et al 2009b) …”

Section: Resultssupporting

confidence: 65%

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Lipase-catalyzed transesterification of rendering plant fat - Short Communication

Proskova¹,

Kopicová²,

Kučera³

et al. 2010

Res. Agric. Eng.

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Prošková A., Kopicová Z., Kučera J., Škarková L., 2010. Lipase-catalyzed transesterification of rendering plant fat. Res. Agr. Eng., 56: 122-125.Soluble lipase (Lipozyme CALB L) was immobilized by covalent bond to chitosan pellets prepared from Aspergillus niger mycelium. This immobilized enzyme was compared with commercial immobilized lipase of the same origin (Novozym 435). Novozym 435 is also lipase CALB L commercially immobilized by sorption on poly-(methyl acrylate). Novozym 435 shows much higher conversion of rendering plant fat in methanol under optimum conditions, having, at the same time, lower optimum temperature and lower stability at higher temperature. Lipozyme CALB L immobilized on chitosan leads to a low conversion, regardless its higher thermal stability. Novozym 435 gives conversion of about 50% of theoretical value, which is in good accordance with basically catalyzed transesterification of rendering plant fat described elsewhere. Lipozyme CALB L immobilized on chitosan gives conversion of about 10% of theoretical value only. The use of Novozym 435 in two-step system (enzyme-acid) seems to be more convenient compared with traditional two-step system (base-acid).

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“…Comparing the results obtained in this work with the transesterification of RPF catalyzed with acid (Prošková et al 2009a) or base (Prošková et al 2009b) …”

Section: Resultssupporting

confidence: 65%

“…The separation of this fat includes expansive drying, separation by elevated temperature under pressure, and cooling. Fatty acid composition was published in detail elsewhere (Prošková et al 2009a).…”

Section: Methodsmentioning

confidence: 99%

Lipase-catalyzed transesterification of rendering plant fat - Short Communication

Proskova¹,

Kopicová²,

Kučera³

et al. 2010

Res. Agric. Eng.

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“…To produce FAME derived from fat from rendering plant the method of acid transesterification reaction was used (Prošková et al 2009). This method was chosen because of high acidity of starting fat (31.14 mg KOH/g of oil).…”

Section: Methodsmentioning

confidence: 99%

Chemical, stoichiometric and thermal analysis of fatty acid methyl esters from processed animal fat

Malaťák¹,

Škarková²,

Proskova³

2013

Res. Agric. Eng.

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Malaťák J., Škarková L., Prošková A., 2013. Chemical, stoichiometric and thermal analysis of fatty acid methyl esters from processed animal fat. Res. Agr. Eng., 59: 83-90.The paper focuses on liquid biofuel raised by transesterification of processed animal fat from rendering plant production suitable for energy use. The objective of the paper is to carry out an element analysis and stoichiometric analysis of selected samples of fuel from rendering plant production and to compare them with classic elements. The results of the analyses prove higher values of nitrogen concentration in the samples from rendering plant fat. In case of the samples of fatty acid methyl esters (FAME) from it a reduction of nitrogen was proved even if the values are still higher than at fatty acid methyl esters rape oil. Concerning the concentration of sulphur and chlorine in the samples of both rendering plant fat and FAME from it their concentration concerning the limiting values do not cause any problem. The net calorific value of the analysed samples is slightly lower. The net calorific value of the samples is particularly reduced by the higher amount of ash and by the oxygen concentration in the sample itself. Higher amount of ash in the fuel increases the amount of solid emissions.

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