EBSCO Logo
Connecting you to content on EBSCOhost
Results
Title

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

Authors

Ellwood, Thomas; Živković, Luka A.; Denissenko, Petr; Abiev, Rufat Sh.; Rebrov, Evgeny V.; Petkovska, Menka

Abstract

The effect of forced periodic modulation of several input parameters on the rate of photocatalytic decomposition of formic acid over a TiO2 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.

Subjects

TITANIUM dioxide; FORMIC acid; LIGHT intensity; MOLE fraction; CATALYSTS

Publication

Processes, 2021, Vol 9, Issue 11, p2046

ISSN

2227-9717

Publication type

Academic Journal

DOI

10.3390/pr9112046

EBSCO Connect | Privacy policy | Terms of use | Copyright | Manage my cookies
Journals | Subjects | Sitemap
© 2025 EBSCO Industries, Inc. All rights reserved