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Table · dataset · 2021

Data for Process intensification in photocatalytic decomposition of formic acid over a TiO2 catalyst by forced periodic modulation of concentration, temperature, flowrate and light intensity

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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.

Description

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.

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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.<br><br>Each combination is displayed.

To view main code open the 'NFRM_OPTI' files within corresponding folder, which call the function files. All MATLAB figures in paper can be found under 'Results' folder with data or within idividual files. Main results from paper come from 'Inlet flow rate and molar fraction' file, use '1RunFile' for Pareto figure.

ALternatively it is possible to open 'NFRM_OPTI' folders and run. Note: in folders the function files starting with G or H are the FRFs autogenerated from cNFR method.

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Chemical engineering 73%
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