Determining the Oxidation Stability of Biodiesel According to EN 14112
Jan 10 2008
The method: oxidation stability according to EN 14112: The determination of the oxidation stability according to EN 14112 is an accelerated oxidation test. The sample is held in a sealed reaction tube at a constant temperature of 110 Â°C while a continuous flow of air is passed through the sample. The fatty acid methyl esters (FAME) in the sample are oxidized to peroxides as the primary oxidation products. After some time, the fatty acids are completely decomposed, forming the secondary oxidation products. In addition to volatile organic compounds, these are lowmolecular organic acids, mainly formic and acetic acids. An air flow transports them to a measuring vessel containing distilled water as the absorption solution. Its conductivity is recorded continuously; as soon as volatile carboxylic acids are formed in the sample, this is indicated by an increase in conductivity. The time that elapses until the secondary oxidation products are detected is known as the induction time and is a measure of the oxidation stability of the sample. The measuring setup: The 873 Biodiesel Rancimat has two independent heating blocks allowing a total of eight samples to be analyzed simultaneously. Each measuring position can be started individually. As soon as the measurement has been completed, the measuring position is immediately ready for a new sample, which means that the instrument can be used to its full capacity.
Petro Industry News 24.1 - Feb/Mar 2023
In This Edition Fuel for Thought - Tribology experts to head to Bari for ECOTRIB 2023 - CEM conference on Emission Monitoring - Call for Papers - North America set to lead global renewable...
View all digital editions
Mar 29 2023 Birmingham, UK
Apr 05 2023 Tashkent, Uzbekistan
Apr 05 2023 Paris, France
Apr 05 2023 Atyrau, Kazakhstan
Apr 11 2023 Moscow, Russia