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Kinetics of iodine dissociation on silica surfaces between 800-1000 K

Grela, M. A. and Colussi, A. J. (1985) Kinetics of iodine dissociation on silica surfaces between 800-1000 K. Anales de la Asociación Química Argentina, 73 (2). pp. 131-139. ISSN 0365-0375. https://resolver.caltech.edu/CaltechAUTHORS:20150731-122012989

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Abstract

The heterogeneously activated atomization of I_2 was studied by modulated beam mass spectrometry in a fused silica molecular flow reactor between 800-1000 K. Experimental dissociation rates at 1000 K are about 10^(3.9) times faster than those estimated for the decomposition of fully equilibrated gas-phase iodine molecules at the same collision frequency and the associated activation energy, E = 24.5 kcal/mol, is considerably smaller than D_O (I_2). Both effects can be ascribed to a chemical reaction involving physisorbed species rather than to direct interfacial energy transfer or reactive gas-solid interactions.


Item Type:Article
ORCID:
AuthorORCID
Colussi, A. J.0000-0002-3400-4101
Additional Information:© 1985 Asociación Química Argentina. Received: October 1984. This work is supported by CIC, SUBCYT and CONICET of Argentina.
Funders:
Funding AgencyGrant Number
Comision de Investigaciones Cientificas de la Provincia de Buenos AiresUNSPECIFIED
Subsecretariat of Science and Technology (SUBCYT)UNSPECIFIED
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)UNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20150731-122012989
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150731-122012989
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59112
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:05 Aug 2015 22:07
Last Modified:03 Oct 2019 08:43

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