Sulfur in Bio-gasoline Using the Primini Biofuel - 1031

In X-ray fluorescence analysis, difference of additive ratio of ETBE or ethanol influences analysis results of sulfur owing to the variation of oxygen content in bio-gasoline. This note introduces a new method which has been developed to correct for the influence using scattering X-rays from samples.


The sulfur content in gasoline has been reduced from the view point of influence on environment and protection of automobile engines. The sulfur content in gasoline and diesel fuel is regulated below 10 ppm since 2009 in Europe.

On the other hand, utilization of non-fossil fuels such as bio-ethanol and bio-diesel has been increased in addition to effective use of conventional fossil fuels such as hydrocarbon fuels for countermeasures against global warming and creation of circulation-type society.

In production of bio-gasoline, there are two types of biofuels; one is to add ETBE (ethyl tert-butyl ether), synthesized from ethanol and isobutene, and the other is to directly add ethanol to gasoline. For example, ETBE is added to gasoline in Germany and France while ethanol is directly added to gasoline in the United States.

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Rigaku's Primini Biofuel is suitable for phosphorus analysis in biodiesel for EN14214 and ASTM D6751. It is optimized for sub-ppm detection limits of P, S and Cl and features easy operation without chemical treatment of the samples. Easy sample preparation and operation reduces the need for a highly skilled operator. A helium atmosphere is maintained in the spectroscopic chamber and sealing film separates the sample chamber from the spectroscopic chamber, protecting the X-ray tube and the spectrometer in the event of a spilled oil sample. Read more...

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