Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Sulfur In Gasoline – On-Line Analysis

28.10.2005


The small device invented and developed by the St. Petersburg chemists can be easily hold in hand. It allows to perform real-time control of mercaptans content in petroleum derivatives – these sulfur compounds are extremely undesirable in gasoline.



In general, nobody likes these sulphur compounds. Besides, they reek – but fortunately, we rarely come across this property. More often they play mean tricks remaining unrecognized since even a small doze of these harmful substances is capable of corroding with time through insides of motor-cars, pipelines and practically any tanks coming into long contact with petroleum and petroleum refining products, including gasoline.

Mercaptans – are actually a disguised acid, certainly it is not so strong as sulphuric acid, but it is unsafe for metals. Alas, these compounds are ususally available in petroleum and petroleum refining products, therefore, it is necessary to clean them from mercaptans and to control the refinement quality as precisely as possible.


So far, the mercaptan analysis in light oil, i.e. in gasoline and other types of petrol, has been performed manually. The procedure is in all cases labour-intensive and frequently not too precise either, because the most widespread method provides understated results. Samples always have to be selected to make analysis in the laboratory, so immediacy of this method can not be relied upon. That accounts for delayed response of production engineers: if mercaptans get suddenly multiple, and production engineers do not yet know about that, necessary measures will be taken late.

The technique developed by chemists of St. Petersburg State University jointly with colleagues from the EKROS Scientific Production Association (St. Petersburg) allows to perform such determination within several minutes. This can be done automatically, if required - in a literal sense without moving way from the pipeline. Chemists call such methods flow-injection ones, i.e. they allow to automatically select samples from the flow of analyzed liquid.

The “heart” of a new method is the so-called chromatography-membrane cell, which was designed by chemists under the guidance of Professor Leonid Moskvin. The cell combines main advantages of the two processes: chromatographic one (high efficiency of mass exchange) and the membrane division of substances (continuous mode of the process). It is in the cell that mercaptans meet with the special reagent flow, due to that they are distinguished from the gasoline stream and form a brightly coloured compound, the content of which is easy to determine – it’s a trivial analytical task. This can also be done automatically.

It is interesting to note that for each determination the device requires four minutes and less than a tea-spoonful of gasoline. The analysis is so precise that it allows to determine mercaptans in tiny quantities – in millionth parts. Now production engineers will be able to learn about sulfur in gasoline practically instantly. So, they will be able to react in time by changing parameters of cleansing process

Sergey Komarov | alfa
Further information:
http://www.informnauka.ru

More articles from Power and Electrical Engineering:

nachricht Fraunhofer ISE Supports Market Development of Solar Thermal Power Plants in the MENA Region
21.02.2018 | Fraunhofer-Institut für Solare Energiesysteme ISE

nachricht New tech for commercial Lithium-ion batteries finds they can be charged 5 times fast
20.02.2018 | University of Warwick

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Attoseconds break into atomic interior

A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.

In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Basque researchers turn light upside down

23.02.2018 | Physics and Astronomy

Finnish research group discovers a new immune system regulator

23.02.2018 | Health and Medicine

Attoseconds break into atomic interior

23.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>