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 Electromagnetic water cloak eliminates drag and wake
12.12.2017 | Duke University

nachricht Two holograms in one surface
12.12.2017 | California Institute of Technology

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: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

Im Focus: Successful Mechanical Testing of Nanowires

With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong

Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Long-lived storage of a photonic qubit for worldwide teleportation

12.12.2017 | Physics and Astronomy

Multi-year submarine-canyon study challenges textbook theories about turbidity currents

12.12.2017 | Earth Sciences

Electromagnetic water cloak eliminates drag and wake

12.12.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>