Subscribe free to our newsletters via your
. 24/7 Space News .




TECH SPACE
New property of flames sparks advances in technology
by Staff Writers
London, UK (SPX) Jun 12, 2012


File image.

Chemists at UCL have discovered a new property of flames, which allows them to control reactions at a solid surface in a flame and opens up a whole new field of chemical innovation. Published in the journal Angewandte Chemie, authors of the new study have discovered their previous understanding of how flames interact with a solid surface was mistaken.

For the first time, they have demonstrated that a particular type of chemistry, called redox chemistry, can be accurately controlled at the surface.

This finding has wide implications for future technology, for example in detection of chemicals in the air, and in developing our understanding of the chemistry of lightning. It also opens up the possibility of being able to perform nitrogen oxide and carbon dioxide electrolysis at the source for the management of green house gases.

Results of the study show that depending on the chemical make-up of the flame, scientists can record a distinctive electrical fingerprint. The fingerprint is a consequence of the behaviour of specific chemical species at the surface of a solid conducting surface, where electrons can exchange at a very precise voltage.

Dr Daren Caruana, from the UCL Department of Chemistry, said: "Flames can be modelled to allow us to construct efficient burners and combustion engines. But the presence of charged species or ions and electrons in flames gives them a unique electrical property."

Dr Caruana added: "By considering the gaseous flame plasma as an electrolyte, we show that it is possible to control redox reactions at the solid/gas interface."

The team developed an electrode system which can be used to probe the chemical make-up of flames. By adding chemical species to the flame they were able to pick up current signals at specific voltages giving a unique electrochemical finger print, called a voltammogram.

The voltammograms for three different metal oxides - tungsten oxide, molybdenum oxide and vanadium oxide - are all unique. Furthermore, the team also demonstrated that the size of the current signatures depend on the amount of the oxide in the flame. Whilst this is possible and routinely done in liquids, this is the first time to be shown in the gas phase.

UCL chemists have shown that there are significant differences between solid/gas reactions and their liquid phase equivalents. Liquid free electrochemistry presents access to a vast number of redox reactions, current voltage signatures that lie outside potential limits defined by the liquid.

The prospect of new redox chemistries will enable new technological applications such as electrodeposition, electroanalysis and electrolysis, which will have significant economic and environmental benefits.

Dr Caruana said: "The mystique surrounding the properties of fire has always captivated our imagination. However, there are still some very significant technical and scientific questions that remain regarding fire and flame."

'Dynamic electrochemistry in flame plasma electrolyte' is published online in the journal Angewandte Chemie.

.


Related Links
University College London
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TECH SPACE
Artificial muscle as shock absorber
Darmstadt, Germany (SPX) Jun 08, 2012
Engineers are working on intelligent materials that can diminish vibrations and extract power from the environment. These electro-active elastomers could dampen annoying vibrations in a car, for example, or supply wireless power to sensors in otherwise inaccessible places. It is not very fun to ride a bicycle on a street plastered with cobblestones. At least the bike has a saddle seat fill ... read more


TECH SPACE
UA Lunar-Mining Team Wins National Contest

NASA Lunar Spacecraft Complete Prime Mission Ahead of Schedule

NASA Offers Guidelines To Protect Historic Sites On The Moon

Neil Armstrong gives rare interview - to accountant

TECH SPACE
Impact atlas catalogs over 635,000 Martian craters

e2v imaging sensors launched into space on NASA mission to Mars

NASA Mars Rover Team Aims for Landing Closer to Prime Science Site

NASA's Mars rover zeroes in on August landing

TECH SPACE
The pressure is on for aquanauts

Virgin Galactic Opens New Office

US scientists host 'bake sale for NASA'

XCOR Appoints Space Expedition Corp As General Sales Agent For Space Tourism Flights

TECH SPACE
Shenzhou 9 crews named in Chinese media

Life Supplies and Manned Docking Tested in Shenzhou-9 Mission

Two Women For Tiangong

Shenzhou 9 Ready For Manned Mission To Tiangong-1

TECH SPACE
Strange Geometry - Yes, It's All About the Math

Capillarity in Space - Then and Now, 1962-2012

Dragon on board

SpaceX Launches Falcon 9 Dragon on Historic Mission

TECH SPACE
NuSTAR Arrives at Island Launch Site

Another Ariane 5 begins its initial build-up at the Spaceport

Boeing Receives DARPA Airborne Satellite Launch Study Contract

Sea Launch Delivers the Intelsat 19 Spacecraft into Orbit

TECH SPACE
Tiny Planet-Finding Mirrors Borrow from Webb Telescope Playbook

Astronomers Probe 'Evaporating' Planet Around Nearby Star with Hobby-Eberly Telescope

Venus transit may boost hunt for other worlds

NSO To Use Venus Transit To Fine-Tune Search For Other Worlds

TECH SPACE
New circuits work in high radiation levels

Apple maps a path to mobile throne

How does Dolomite form

Amazon offer Cloud Player app for iPhone




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement