| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Dearn, K. D.
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2023Characterisation of soot agglomerates from engine oil and exhaust system for modern compression ignition enginescitations
- 2022Bio-Tribo-Acoustic Emissions: Condition Monitoring of a Simulated Joint Articulationcitations
- 2020A method for the assessment of the coefficient of friction of articular cartilage and a replacement biomaterialcitations
- 2019Improvement of the tribological behaviour of palm biodiesel via partial hydrogenation of unsaturated fatty acid methyl esterscitations
- 2018The tribology of fructose derived biofuels for DISI gasoline enginescitations
- 2017Corrosion and tribological performance of quasi-stoichiometric titanium containing carbo-nitride coatingscitations
- 2017Crack growth in medical-grade silicone and polyurethane ether elastomerscitations
- 2017The influence of variations of geometrical parameters on the notching stress intensity factors of cylindrical shellscitations
- 2016The Tribology of cleaning processescitations
- 2015The evolution of polymer wear debris from total disc arthroplastycitations
- 2014The wear of PEEK in rolling-sliding contact - simulation of polymer gear applicationscitations
Places of action
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article
Improvement of the tribological behaviour of palm biodiesel via partial hydrogenation of unsaturated fatty acid methyl esters
Abstract
<p>Partial hydrogenation of unsaturated fatty acid methyl esters, the so-called H-FAME, has been developed, particularly for application in warm climates, to improve the oxidation stability of biodiesel. During the H-FAME process, polyunsaturated ester molecules, which are a primary cause of biodiesel induced oxidation, can be reduced. In this paper, the lubrication properties and mechanisms have been studied when high quality biodiesel from palm was upgraded to H-FAME. Lubricity tests were performed using a high-frequency reciprocating rig (HFRR). After the lubricity tests, wear scar and deposits on the tested specimens were analyzed using a scanning electron microscope (SEM) equipped with energy-dispersive X-ray spectrometry (EDS). It was found that the partial hydrogenation upgrading process reduced polyunsaturated molecules and also transformed cis-monounsaturated molecules (C18:1 cis) into trans-monounsaturated molecules (C18:1 trans). This increased the stability of the lubricating film when C18:1 trans molecules were present, and so improved the lubricity of the H-FAME. An observation of wear damage suggested that the H-FAME was able to form dense and stable tribo-films on the steel test surfaces, protecting them from abrasive damage such as scoring and scratching. As a result of the reduction of polyunsaturated ester molecules, the lubricity of the H-FAME was less sensitive to the changes in humidity. Moreover, there was evidence of a reduction in both corrosive wear and large agglomerations of deposits for the H-FAME upgraded palm biodiesel due to its higher oxidation stability.</p>