The application of automated feedback and feedforward control to a LED-based photocatalytic reactor

Journal article (2019)

Authors

F. Khodadadian Intensified Reaction and Separation Systems - Mechanical, Maritime and Materials Engineering
J.R. van Ommen ChemE/Product and Process Engineering - AS
A.I. Stankiewicz Intensified Reaction and Separation Systems - Mechanical, Maritime and Materials Engineering
Richard Lakerveld Hong Kong University of Science and Technology
Research Group
Intensified Reaction and Separation Systems (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2019 F. Khodadadian, F.O. Galnares de la Garza, J.R. van Ommen, A.I. Stankiewicz, Richard Lakerveld
DOI: https://doi.org/10.1016/j.cej.2018.12.134
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Published Date

2019

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Intensified Reaction and Separation Systems

Abstract

An optimal photon utilization is important for the economic performance of a photocatalytic reactor. However, for the desired reactor performance, it is often difficult to predict the required photon utilization. In this work, automated feedback and feedforward controllers are investigated to maintain the reactor conversion close to a desired value by adjusting the photon irradiance within a LED-based photocatalytic reactor for toluene degradation. The feedback controller was able to control the conversion during a set-point tracking experiment and was able to mitigate the effects of catalyst deactivation in an automated fashion. The feedforward controller was designed based on an empirical steady-state model to mitigate the effect of changing toluene inlet concentration and relative humidity, which were measured input disturbances. The results demonstrated that feedback and feedforward control were complementary and could mitigate the effects of disturbances effectively such that the photocatalytic reactor operated close to desired conditions at all times. The presented work is the first example of how online analytical technologies can be combined with “smart” light sources such as LEDs to implement automated process control loops that optimize photon utilization. Future work may expand on this concept by developing more advanced control strategies and exploring applications in different areas.

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