Nonlinear Modelling of Kinetic Data Obtained from Photocatalytic Mineralisation of 2,4-Dichlorophenol on a Titanium Dioxide Membrane
Joint Authors
Rossi, Mauro
Groppi, Flavia
Scotti, Roberto
Cobzaru, Gabriela
Stanescu, Rodica
Bonardi, Mauro Luigi
Gini, Luigi
Bobirica, Liliana
Costache, Cristina
Morazzoni, Franca
Tozzi, Paola Maria
Bellobono, Ignazio Renato
D'Arienzo, Massimiliano
Bianchi, Riccardo
Source
International Journal of Photoenergy
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-04-14
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Photomineralisation of 2,4-dichlorophenol (DCP) in aqueous solutions (10.0–100.0 mg/L of C) was systematically studied at 318±3 K, in an annular laboratory-scale reactor, by photocatalytic membranes immobilizing titanium dioxide, as a function of substrate concentration, and absorbed power per unit length of membrane.
Kinetics of both substrate disappearance, to yield intermediates, and total organic carbon (TOC) disappearance, to yield carbon dioxide, were followed (first series of experiments).
At a fixed value of irradiance (1.50 W⋅cm−1), other series of mineralization experiments were repeated (second series of experiments) by carrying out only analyses of chemical oxygen demand (COD), in order to compare modelling results of the two sets of experiments.
In both sets of experiments, stoichiometric hydrogen peroxide was used as oxygen donor.
For the first series of experiments, a kinetic model was employed, already validated in previous work, from which, by a set of differential equations, four final optimised parameters, k1 and K1, k2 and K2, were calculated.
By these parameters, the whole kinetic profile could be fitted adequately.
The influence of irradiance on k1 and k2 could be rationalised very well by this four-parameter kinetic model.
Modelling of quantum yields, as a function of irradiance, could also be carried out satisfactorily.
As has been found previously for other kinds of substrates, modelling of quantum yields for DCP mineralization is consistent with kinetics of hydroxyl radicals reacting between themselves, leading to hydrogen peroxide, other than with substrate or intermediates leading finally to carbon dioxide, paralleled by a second competition kinetics involving superoxide radical anion.
For the second series of experiments, on the contrary, the Langmuir-Hinshelwood model was employed.
Uncertainties of COD analyses, coupled with discrepancies of this model and with its inability to reproduce kinetics up to complete mineralization, are underlined.
American Psychological Association (APA)
Bellobono, Ignazio Renato& Scotti, Roberto& D'Arienzo, Massimiliano& Morazzoni, Franca& Bianchi, Riccardo& Stanescu, Rodica…[et al.]. 2009. Nonlinear Modelling of Kinetic Data Obtained from Photocatalytic Mineralisation of 2,4-Dichlorophenol on a Titanium Dioxide Membrane. International Journal of Photoenergy،Vol. 2009, no. 2009, pp.1-10.
https://search.emarefa.net/detail/BIM-486684
Modern Language Association (MLA)
Bellobono, Ignazio Renato…[et al.]. Nonlinear Modelling of Kinetic Data Obtained from Photocatalytic Mineralisation of 2,4-Dichlorophenol on a Titanium Dioxide Membrane. International Journal of Photoenergy No. 2009 (2009), pp.1-10.
https://search.emarefa.net/detail/BIM-486684
American Medical Association (AMA)
Bellobono, Ignazio Renato& Scotti, Roberto& D'Arienzo, Massimiliano& Morazzoni, Franca& Bianchi, Riccardo& Stanescu, Rodica…[et al.]. Nonlinear Modelling of Kinetic Data Obtained from Photocatalytic Mineralisation of 2,4-Dichlorophenol on a Titanium Dioxide Membrane. International Journal of Photoenergy. 2009. Vol. 2009, no. 2009, pp.1-10.
https://search.emarefa.net/detail/BIM-486684
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-486684