If you like us, please share us on social media.
The latest UCD Hyperlibrary newsletter is now complete, check it out.

GeoWiki.png
ChemWiki: The Dynamic Chemistry E-textbook > Development Details > Approaches > Demos > Additional Demos > The Catalytic Combustion Demonstration Unit

MindTouch
Copyright (c) 2006-2014 MindTouch Inc.
http://mindtouch.com

This file and accompanying files are licensed under the MindTouch Master Subscription Agreement (MSA).

At any time, you shall not, directly or indirectly: (i) sublicense, resell, rent, lease, distribute, market, commercialize or otherwise transfer rights or usage to: (a) the Software, (b) any modified version or derivative work of the Software created by you or for you, or (c) MindTouch Open Source (which includes all non-supported versions of MindTouch-developed software), for any purpose including timesharing or service bureau purposes; (ii) remove or alter any copyright, trademark or proprietary notice in the Software; (iii) transfer, use or export the Software in violation of any applicable laws or regulations of any government or governmental agency; (iv) use or run on any of your hardware, or have deployed for use, any production version of MindTouch Open Source; (v) use any of the Support Services, Error corrections, Updates or Upgrades, for the MindTouch Open Source software or for any Server for which Support Services are not then purchased as provided hereunder; or (vi) reverse engineer, decompile or modify any encrypted or encoded portion of the Software.

A complete copy of the MSA is available at http://www.mindtouch.com/msa

The Catalytic Combustion Demonstration Unit

 

Chemical Concepts Demonstrated

  • Heat-based catalysis
  • Use of a ceramic as the solid support for a catalyst

Demonstation

The catalytic combustion unit consists of a glass tube with a honeycomb block of ceramic coated with a noble metal (platinum and/or palladium) inside.
  • The catalytic combustion unit is heated with a Bunsen burner until the bottom starts to glow red.
  • The gas is then quickly shut off, the burner is inserted into the glass tubing, and the gas is turned on again.

Observations

The bottom continues to glow red hot.

Explanation

The catalyst in this situation is the ceramic/metal block.  It catalyses the oxidation of whatever fuel that the Bunsen burner happens to be running off of.  The product from this oxidation is not flammable, and a match would go out if it were held above the unit.

Catalytic combustion units are used on such devices as automobiles and wood-burning stoves.  When the fuel in these devices is combusted, there is a chance that the combustion will be incomplete.  Combustion units such as these complete the oxidation of these fuels and, as a result, produce more heat and less pollutants.

Contributors

 

You must to post a comment.
Last Modified
10:30, 2 Oct 2013

Tags

Classifications

(not set)
(not set)

Creative Commons License Unless otherwise noted, content in the UC Davis ChemWiki is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License. Permissions beyond the scope of this license may be available at copyright@ucdavis.edu. Questions and concerns can be directed toward Prof. Delmar Larsen (dlarsen@ucdavis.edu), Founder and Director. Terms of Use