Res. Agr. Eng., 2008, 54(4):163-169 | DOI: 10.17221/11/2008-RAE
Evaluation of thermooxidation stability of biodegradable recycled rapeseed-based oil NAPRO-HO 2003
- 1 Department of Forest and Mobile Technology, Faculty of Environmental and Manufacturing Technology, Technical University in Zvolen, Slovak Republic
- 2 Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry in Brno, Brno, Czech Republic
The paper deals with the problems of introducing biodegradable oils in relation to the environmental protection. In the course of the research, the parameters were tested and improved of a number of rapeseed-based oils. Thus, two groups of oils were created to enable to distinguish raffinates and recycled oils. Recycling can remove the greatest disadvantage of raffinates, namely their thermo-oxidation instability, which becomes evident particularity by the formation of hardenable polymer deposits. The deposits result in the loss of the function of the components of the hydraulic circuit and gearbox. The methods of testing are based on the follow-up of the changes in acid value, kinematic viscosity at 40°C, water content, and peroxide number during the service life test. It has been proved that peroxide number characterises very well the thermo-oxidation stability, which is nearly unsatisfactory in raffinates. Within the cooperation in the international program KONTAKT, compliance tests were carried out of recycled rapeseed-based oil NAPRO 2003 in a hydraulic circuit and gearboxes. Their results are compared with the parameters of the best-recycled oils available.
Keywords: biodegradable oils; hydraulic circuit; gearboxes; recycled oil
Published: December 31, 2008 Show citation
References
- Harms H.H. (1998): Development trends in a hydraulics of mobile machines. In: Proc. 16th Int. Conf. Hydraulics and Pneumatics. Brno, Tanger, Ostrava, 144-150. (in Czech)
- Kržan B., Vižitin J. (2003): Tribological properties of an environmentally adopted universal tractor transmission oil based on vegetable oil. Tribology International, 36: 827-833.
Go to original source... - Kučera M. (2003): Biodegradable hydraulic oils in a hydrostatic systems of forest machines. Acta Facultatis Technicae, 7: 43-49. (in Slovak)
- Kučera M. (2006): Examination of sealing materials in ecologically friendly hydraulic oils - Part 1 - Volume changes. Acta Facultatis Technicae, 10: 61-68. (in Slovak)
- Rousek M. (2003): Characteristics and Parameters of Biologically Degradable Oils. MZLU, Brno. (in Czech)
- Rousek M. et al. (2004): The use of methods of tribotechnical diagnostics to determine the reliability of biodegradable oils. In: Proc. Colloquium to Grant Work No.1/9260/02. TU Zvolen, 99-107. (in Czech)
- Rousek M. et al. (2005): The use of methods of tribotechnical diagnostics for testing the parameters of recycled biodegradable hydraulic oil NAPRO 2003. Acta Facultatis Technicae, 9: 121-135. (in Czech)
- Skoupý A. (2004): Biologically degradable oils at working with power saws. Journal of Forest Science, 50: 542-547. Go to original source...
This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY NC 4.0), which permits non-comercial use, distribution, and reproduction in any medium, provided the original publication is properly cited. No use, distribution or reproduction is permitted which does not comply with these terms.