Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Coking of fluid fuels - New procedure shall analyze and avoid reasons

06.11.2015

In heating appliances, diesel engines and other technical systems driven by fluid fuels and lubricants, combustion can lead to growing undesirable deposits (coking), which may affect the functionality of the system. Deposits arise during the evaporation of fuels on hot surfaces. The detailed processes are unclear. Within a common research project, the chair for Analytical Chemistry of the University Rostock and the Oel-Waerme-Institut (OWI) want to get to the bottom of the reasons for deposit formation in modern combustion systems.

Deposits arise during the evaporation of fuels on hot surfaces. The detailed processes are unclear. Within a common research project, the chair for Analytical Chemistry of the University Rostock and the Oel-Waerme-Institut (OWI) want to get to the bottom of the reasons for deposit formation in modern combustion systems.


Within the combustion of fluid fuels on hot surfaces, undesirable deposits may occur. Comparing example of a test apparatus with and without deposits.

OWI Oel-Waerme-Institut GmbH

Aim of the research project is to rebuild and analyze the process of deposit formation in form of a reproducible and under laboratory conditions representable procedure. Suitable seems to be the existing procedure of the thermogravimetric analysis (TGA), which still needs to be enhanced.

Afterwards, the TGA built deposits are transferred into the gas phase by further continuous increase of the surface temperature (pyrolysis) or oxidation and investigated via mass spectroscopic analysis (TGA/MS).

With help of this procedure, the simulation of processes in the building and regeneration of deposits, which can be observed within technical combustion, under defined thermal boundary conditions is possible for the first time. That allows a transmission of knowledge into the technical development of mixture formation systems for heating systems or fuels and additives.

In current research, numerous influencing variables of the deposit formation such as the fuel composition, especially the material and roughness of the wetted surface, are discussed and easily displayed by a suitable selection of the TGA’s sample container.

In a second part of the project, the knowledge shall be used to either avoid the deposit formation or to reduce formed deposits by a suitable process control. For this, two test benches are developed by which the tendency for coking of technical mixture formation systems (porous medium and spray formation) can be examined.

Michael Ehring | idw - Informationsdienst Wissenschaft
Further information:
http://www.owi-aachen.de/

More articles from Process Engineering:

nachricht Copper oxide photocathodes: laser experiment reveals location of efficiency loss
10.05.2019 | Helmholtz-Zentrum Berlin für Materialien und Energie

nachricht NIST research sparks new insights on laser welding
02.05.2019 | National Institute of Standards and Technology (NIST)

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: 'Nanochains' could increase battery capacity, cut charging time

How long the battery of your phone or computer lasts depends on how many lithium ions can be stored in the battery's negative electrode material. If the battery runs out of these ions, it can't generate an electrical current to run a device and ultimately fails.

Materials with a higher lithium ion storage capacity are either too heavy or the wrong shape to replace graphite, the electrode material currently used in...

Im Focus: Stevens team closes in on 'holy grail' of room temperature quantum computing chips

Photons interact on chip-based system with unprecedented efficiency

To process information, photons must interact. However, these tiny packets of light want nothing to do with each other, each passing by without altering the...

Im Focus: Happy hour for time-resolved crystallography

Researchers from the Department of Atomically Resolved Dynamics of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg, the University of Hamburg and the European Molecular Biology Laboratory (EMBL) outstation in the city have developed a new method to watch biomolecules at work. This method dramatically simplifies starting enzymatic reactions by mixing a cocktail of small amounts of liquids with protein crystals. Determination of the protein structures at different times after mixing can be assembled into a time-lapse sequence that shows the molecular foundations of biology.

The functions of biomolecules are determined by their motions and structural changes. Yet it is a formidable challenge to understand these dynamic motions.

Im Focus: Modular OLED light strips

At the International Symposium on Automotive Lighting 2019 (ISAL) in Darmstadt from September 23 to 25, 2019, the Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, a provider of research and development services in the field of organic electronics, will present OLED light strips of any length with additional functionalities for the first time at booth no. 37.

Almost everyone is familiar with light strips for interior design. LED strips are available by the metre in DIY stores around the corner and are just as often...

Im Focus: Tomorrow´s coolants of choice

Scientists assess the potential of magnetic-cooling materials

Later during this century, around 2060, a paradigm shift in global energy consumption is expected: we will spend more energy for cooling than for heating....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Optical Technologies: International Symposium „Future Optics“ in Hannover

19.09.2019 | Event News

Society 5.0: putting humans at the heart of digitalisation

10.09.2019 | Event News

Interspeech 2019 conference: Alexa and Siri in Graz

04.09.2019 | Event News

 
Latest News

Quality control in immune communication: Chaperones detect immature signaling molecules in the immune system

20.09.2019 | Life Sciences

Moderately Common Plants Show Highest Relative Losses

20.09.2019 | Life Sciences

The Fluid Fingerprint of Hurricanes

20.09.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>