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 Supersonic waves may help electronics beat the heat
18.05.2018 | DOE/Oak Ridge National Laboratory

nachricht Researchers control the properties of graphene transistors using pressure
17.05.2018 | Columbia University

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: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Matabele ants: Travelling faster with detours

22.05.2018 | Life Sciences

Flow of cerebrospinal fluid regulates neural stem cell division

22.05.2018 | Life Sciences

Chemists at FAU successfully demonstrate imine hydrogenation with inexpensive main group metal

22.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>