Process Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity

The effect of forced periodic modulation of several input parameters on the rate of photocatalytic decomposition of formic acid over a TiO<sub>2</sub> thin film catalyst has been investigated in a continuously stirred tank reactor. The kinetic model was adopted based on the literature an...

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Autores principales:	Thomas Ellwood, Luka A. Živković, Petr Denissenko, Rufat Sh. Abiev, Evgeny V. Rebrov, Menka Petkovska
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	forced periodic modulation formic acid decomposition TiO<sub>2</sub> non-stationary CSTR process intensification Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/08ff47aa15cf42c6a18c2232180948fc
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spelling	oai:doaj.org-article:08ff47aa15cf42c6a18c2232180948fc2021-11-25T18:51:45ZProcess Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity10.3390/pr91120462227-9717https://doaj.org/article/08ff47aa15cf42c6a18c2232180948fc2021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/2046https://doaj.org/toc/2227-9717The effect of forced periodic modulation of several input parameters on the rate of photocatalytic decomposition of formic acid over a TiO<sub>2</sub> thin film catalyst has been investigated in a continuously stirred tank reactor. The kinetic model was adopted based on the literature and it includes acid adsorption, desorption steps, the formation of photocatalytic active sites and decomposition of the adsorbed species over the active titania sites. A reactor model was developed that describes mass balances of reactive species. The analysis of the reactor was performed with a computer-aided nonlinear frequency response method. Initially, the effect of amplitude and frequency of four input parameters (flowrate, acid concentration, temperature and light intensity) were studied. All single inputs provided only a minor improvement, which did not exceed 4%. However, a modulation of two input parameters, inlet flowrate and the acid molar fraction, considerably improved the acid conversion from 80 to 96%. This is equivalent to a factor of two increase in residence time at steady-state operation at the same temperature and acid concentration.Thomas EllwoodLuka A. ŽivkovićPetr DenissenkoRufat Sh. AbievEvgeny V. RebrovMenka PetkovskaMDPI AGarticleforced periodic modulationformic acid decompositionTiO<sub>2</sub>non-stationary CSTRprocess intensificationChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 2046, p 2046 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	forced periodic modulation formic acid decomposition TiO<sub>2</sub> non-stationary CSTR process intensification Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	forced periodic modulation formic acid decomposition TiO<sub>2</sub> non-stationary CSTR process intensification Chemical technology TP1-1185 Chemistry QD1-999 Thomas Ellwood Luka A. Živković Petr Denissenko Rufat Sh. Abiev Evgeny V. Rebrov Menka Petkovska Process Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity
description	The effect of forced periodic modulation of several input parameters on the rate of photocatalytic decomposition of formic acid over a TiO<sub>2</sub> thin film catalyst has been investigated in a continuously stirred tank reactor. The kinetic model was adopted based on the literature and it includes acid adsorption, desorption steps, the formation of photocatalytic active sites and decomposition of the adsorbed species over the active titania sites. A reactor model was developed that describes mass balances of reactive species. The analysis of the reactor was performed with a computer-aided nonlinear frequency response method. Initially, the effect of amplitude and frequency of four input parameters (flowrate, acid concentration, temperature and light intensity) were studied. All single inputs provided only a minor improvement, which did not exceed 4%. However, a modulation of two input parameters, inlet flowrate and the acid molar fraction, considerably improved the acid conversion from 80 to 96%. This is equivalent to a factor of two increase in residence time at steady-state operation at the same temperature and acid concentration.
format	article
author	Thomas Ellwood Luka A. Živković Petr Denissenko Rufat Sh. Abiev Evgeny V. Rebrov Menka Petkovska
author_facet	Thomas Ellwood Luka A. Živković Petr Denissenko Rufat Sh. Abiev Evgeny V. Rebrov Menka Petkovska
author_sort	Thomas Ellwood
title	Process Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity
title_short	Process Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity
title_full	Process Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity
title_fullStr	Process Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity
title_full_unstemmed	Process Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity
title_sort	process intensification in photocatalytic decomposition of formic acid over a tio<sub>2</sub> catalyst by forced periodic modulation of concentration, temperature, flowrate and light intensity
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/08ff47aa15cf42c6a18c2232180948fc
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Process Intensification in Photocatalytic Decomposition of Formic Acid over a TiO<sub>2</sub> Catalyst by Forced Periodic Modulation of Concentration, Temperature, Flowrate and Light Intensity

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