Chemical and Biomolecular Engineering Research and Publications

 

Date of this Version

November 2003

Comments

Published in Industrial and Engineering Chemistry Research 2003, Vol. 42 No 26, 6714-6719 © 2003 American Chemical Society: Web Release Date: November 20, 2003 . The American Chemical Society allows the posting of only the title, abstract, tables, and figures from articles appearing in the Journal of American Chemical Society. This article can be viewd at the publishers site: http://pubs.acs.org/cgi-bin/abstract.cgi/iecred/2003/42/i26/abs/ie030337k.html DOI: 10.1021/ie030337k Copyright © 2003 American Chemical Society.

Abstract

An experimental method, electro thermal explosion (ETE), is used to measure the macro kinetic parameters of the high-temperature titanium/carbon reaction. Different stages of the reaction have been identified, but the focus of this study is on the reaction between solid titanium and solid carbon, i.e., prior to the melting of titanium. The reaction has high activation energy, and an electric current is used to heat the cylindrically shaped sample to a specified temperature. The current is shut off at a temperature below the melting point of titanium; any further temperature rise is only due to reaction. The output of the ETE equipment is temperature time data that can be processed to recover the kinetic parameters. The activation energy and preexponential factor of the reaction rate constant are calculated and comprise 214 kJ mol-1 and (6.2 ( 1.5) _ 107 s-1, respectively. An important aspect of solid-phase reactions is the contact area between reactants. The contact area between titanium and carbon particles is calculated, and the reaction constant is corrected for this effect.

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