Tag Archives: RME

1763-1771 S. Heikkilä, K. Sirviö, C. Nuortila and S. Niemi
Storage stability of rapeseed methyl ester stored in a sealed barrel for seven years
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Storage stability of rapeseed methyl ester stored in a sealed barrel for seven years

S. Heikkilä*, K. Sirviö, C. Nuortila and S. Niemi

University of Vaasa, School of Technology and Innovations, P.O. Box 700, FIN-65101 Vaasa, Finland
*Correspondence: sonja.heikkila@univaasa.fi

Abstract:

Storage stability is one of the main quality parameters related to fatty acid methyl esters (FAME) biofuels. The deterioration of biofuels´ properties during storage is a more serious issue than with conventional fuels. In particular, lengthy storage threatens the oxidative stability of FAME fuels because factors such as the presence of air, elevated temperatures or presence of metals promote the oxidation process. Consequently, the acceptable storage time for FAME fuels is generally regarded to be regrettably short, at no more than six to12 months. However, storage conditions play an important role in determining actual storage stability. This study aimed to investigate and evaluate any deterioration in the quality of rapeseed methyl ester (RME) fuel that has been stored for as long as seven years in adequate storage conditions. The fuel was stored in the dark, contained in a sealed steel barrel in an insulated shipping container outdoors. The temperature of the container varied with seasonal fluctuation, but the fuel never froze during storage. The study analysed six key fuel properties of the RME: ester content; water content; density; kinematic viscosity; oxidation stability index; and acid number. The analyses were conducted immediately after opening the barrel, and again after two months of storage in a laboratory. The results were compared to those measured for the fresh fuel, seven years earlier. The comparison of the results indicate that the fuel quality had suffered no serious deterioration during the seven-year period.

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613-620 M. Pexa, J. Čedík,, J. Mařík, V. Hönig, Š. Horníčková and K. Kubín
Comparison of the operating characteristics of the internal combustion engine using rapeseed oil methyl ester and hydrogenated oil
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Comparison of the operating characteristics of the internal combustion engine using rapeseed oil methyl ester and hydrogenated oil

M. Pexa¹, J. Čedík¹,*, J. Mařík¹, V. Hönig², Š. Horníčková² and K. Kubín³

¹Czech University of Life Sciences Prague, Faculty of Engineering, Department for Quality and Dependability of Machines, Kamýcká 129, CZ16521 Prague 6, Czech Republic; *Correspondence: cedikj@tf.czu.cz
²Czech University of Life Sciences Prague, Faculty of Agrobiology, Food and Natural Resources, Department of Chemistry, Kamýcká 129, CZ16521 Prague 6, Czech Republic
³Research Institute of Agricultural Engineering, p.r.i., Drnovská 507, CZ16101 Prague 6, Czech Republic

Abstract:

The issue of the use of alternative fuels in diesel engines is discussed in this paper. The purpose is to reduce the dependence of EU Member States on fuels of petroleum origin. One of the possibilities is the use of oils from biological materials. The use of the oil in standard engines is not usually possible. The engine modification or the fuel modification is necessary. Esterification or hydrogenation of oils can be used as the fuel modification. Impact of these changes on the operational characteristics of a turbocharged internal combustion engine is observed in the paper. The internal combustion engine of the tractor Zetor Foretrra 8641 was used for testing. This engine was burdened using a dynamometer to the PTO. Performance and fuel consumption of the engine were monitored during measurement. As fuels the 100% rapeseed methyl ester and 100% hydrogenated oil was elected. Based on the results we can say that the operating parameters of the internal combustion engine does not change significantly when using these fuels.

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