Please use this identifier to cite or link to this item:
Title: Photocatalytic kinetics of phenol and its derivatives over UV irradiated TiO2
Authors: Chen, D.
Ray, A.K. 
Keywords: Kinetic study
Photocatalytic oxidation
TiO2 catalyst
Issue Date: 1-Nov-1999
Source: Chen, D., Ray, A.K. (1999-11-01). Photocatalytic kinetics of phenol and its derivatives over UV irradiated TiO2. Applied Catalysis B: Environmental 23 (2-3) : 143-157. ScholarBank@NUS Repository.
Abstract: In recent years, photocatalytic degradation mediated by illuminated TiO2 has received considerable attention as an alternative for treating polluted water. In the present study, a new two-phase swirl-flow monolithic-type reactor was used to study the kinetics of heterogeneous photocatalytic processes. Photocatalytic degradation of phenol, 4-chlorophenol (4-CP) and 4-nitrophenol (4-NP) both in aqueous suspensions and over immobilized Degussa P25 TiO2 has been studied in laboratory scale. Experiments were conducted to investigate the effects of parameters such as catalyst dosage, pollutant concentration, temperature, partial pressure of oxygen, UV light intensity, catalyst-layer thickness, circulation flowrate and catalyst annealing temperature. Simple model for predicting the optimal catalyst dosage in aqueous suspensions for different photo-systems was proposed. Pseudo first-order kinetics with respect to all the parent compounds was observed. Experimental data obtained under different conditions were fitted with kinetic equation to describe the dependency of degradation rate as a function of the above mentioned parameters. Consequently, kinetic parameters were experimentally determined. Adsorptive properties of all the organics were also experimentally measured and fitted with Langmuir equation. The extreme low surface coverage of the organics on the catalyst may be one of the main factors that result in the low efficiency of the photocatalytic process. Besides, mass transfer of organics and oxygen in the photocatalytic process has also been discussed in detail.
Source Title: Applied Catalysis B: Environmental
ISSN: 09263373
DOI: 10.1016/S0926-3373(99)00068-5
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 14, 2018


checked on Mar 14, 2018

Page view(s)

checked on Mar 11, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.