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Mathematical Model of a Photocatalytic Fiber-Optic Cable Reactor for Heterogeneous Photocatalysis

Peill, Nicola J. and Hoffmann, Michael R. (1998) Mathematical Model of a Photocatalytic Fiber-Optic Cable Reactor for Heterogeneous Photocatalysis. Environmental Science and Technology, 32 (3). pp. 398-404. ISSN 0013-936X. https://resolver.caltech.edu/CaltechAUTHORS:20150807-112625347

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Abstract

A basic mathematical model to describe the degradation of a single compound in a fiber-optic bundled array photocatalytic batch reactor (OFR) using a Langmuir−Hinshelwood kinetic expression is developed. An empirical global quantum efficiency, φ_(global), that incorporates reaction parameters such as the absorbed light intensity, intrinsic rate constants, concentration of adsorbed reactants, and reaction intermediates is used as a fitting parameter. An empirical term to describe the radiation field within the coated fiber is derived experimentally and normalized by the photocatalyst particle concentration within the fiber optic coating to account for the inverse relationship observed between absorbed light intensity and reaction quantum efficiency. Results of the mathematical model are compared to experimental data generated in an OFR for the photocatalytic oxidation of 4-chlorophenol (4CP), pentachlorophenol (PCP), and dichloroacetate (DCA). The global quantum efficiency, φglobal, was found to be independent of absorbed light intensity. Calculated kinetic profiles are in excellent agreement with experimental observation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/es960874eDOIArticle
http://pubs.acs.org/doi/abs/10.1021/es960874ePublisherArticle
ORCID:
AuthorORCID
Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 1998 American Chemical Society. Received for review October 11, 1996. Revised manuscript received October 24, 1997. Accepted November 3, 1997. Publication Date (Web): January 1, 1998. We are grateful to ARPA, NSF (BES-9619885), and ONR (NAV 5 HFMN N000149J1901) for financial support and to Prof. George Gavalas, Janet Kesselman, and Tom Lloyd for their helpful discussions. We would also like to thank 3M and Degussa for their donations of the optical fiber samples and the P25 photocatalyst, respectively.
Funders:
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
NSFBES-9619885
Office of Naval Research (ONR)NAV5 HFMN N000149J1901
Issue or Number:3
Record Number:CaltechAUTHORS:20150807-112625347
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150807-112625347
Official Citation:Mathematical Model of a Photocatalytic Fiber-Optic Cable Reactor for Heterogeneous Photocatalysis Nicola J. Peill and Michael R. Hoffmann Environmental Science & Technology 1998 32 (3), 398-404 DOI: 10.1021/es960874e
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59321
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:07 Aug 2015 23:21
Last Modified:03 Mar 2020 13:01

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