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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.

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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
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.
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
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59112
Deposited By: George Porter
Deposited On:05 Aug 2015 22:07
Last Modified:03 Oct 2019 08:43

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