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Introduction:
Fatty Acid Methyl Esters (FAME) as a new type of biomass energy, it is gradually becoming an important source of fuel for diesel powered vehicles. Compared with traditional fossil fuels, it has renewable and outstanding environmental protection characteristics, and has attracted more and more attention. Like edible oil, biodiesel is not stable during storage and will be slowly oxidized by oxygen in the air. The primary products of the oxidation process are peroxides. After a period of time, the esters are completely consumed. The secondary reaction products are mainly small molecular organic acids, volatile organic compounds and some colloidal polymeric substances, which will cause engine damage. Therefore, oxidation stability is an important index to measure the quality of biodiesel, which needs to be tested regularly in the process of production and storage.
At present, the European standard EN14112- Oxidation Stability Test of Fat and Oil Derivatives - Fatty Acid Methyl Ester (FAME) (Accelerated Oxidation Method), is used as a unified method to determine the oxidation stability of biodiesel.
The Automatic Rancimat Method Biodiesel Oxidation Stability Tester is manufactured according to NB/SH/T 0873-2013 Biodiesel and Its Blended Fuels -- Determination of Oxidation Stability -- Accelerated Oxidation Method. Other Applicable standards are as follows:
• ISO 6886:Animal and vegetable fats and oils -- Determination of oxidative stability (accelerated oxidation test)
• EN 14112-2003 :Fatty Acid Methyl Esters (FAME) - Determination of oxidation stability (accelerated oxidation test)
• EN15751 Automotive fuels - Fatty acid methyl ester (FAME) fuel and blends with diesel fuel - Determination of oxidation stability by accelerated oxidation method
• EN16568 Automotive fuels - Blends of Fatty acid methyl ester (FAME) with diesel fuel - Determination of oxidation stability by rapidly accelerated oxidation method at 120 Degrees
The measuring principle of the Automatic Rancimat Method Biodiesel Oxidation Stability Tester is that the sample is placed in an aluminum heating block with constant temperature, the clean air is introduced into the biodiesel sample, and the air flows through the sample into the measuring tank containing absorption liquid and bubbles. The end of the induction period is accompanied by the production of volatile organic acids (mainly formic acid), which will accelerate the increase of conductivity in the measuring cell. The conductivity of the absorption solution is recorded by computer software, and the induction time is automatically obtained by automatically calculating the second-order differential maximum point of the conductivity versus time curve.
Specifications:
| Temp.controlling | Import PID temp.controller |
| Flow range | 8~12L/h±10% |
| Measuring range | 0~800 μS/cm |
| Resolution | 0.1μS/cm |
| Gas source | 10L/H with special membrane pump |
| Temp.controlling method | electrical heating rod |
| Working temp. | 50~150ºC±0.1ºC |
| Power supply | AC220V±10% 50HZ |
| Power consumption | 1.1KW |
| Result processing | automatical calculation and storing by PC |
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