Transport and surface reaction model of a photocatalytic membrane during the radical filtration of methylene blue

Shuyana A. Heredia Deba, Bas A. Wols, Doekle R. Yntema, Rob G.H. Lammertink*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

14 Downloads (Pure)

Abstract

This study explores the synergy between photocatalytic oxidation and membrane filtration using a photocatalytic membrane. Titanium dioxide coated alumina membranes were fabricated and tested in a customized Photocatalytic Membrane Reactor (PMR) module. The discoloration of methylene blue (MB), 3.2 mg·L−1 in an aqueous solution, was evaluated in dead-end filtration mode. A simple 1D analytic transport and surface reaction model was used based on advection and diffusion, containing intrinsic retention by the membrane and reaction kinetics to predict the permeate concentration. The discoloration of MB by the photocatalytic membrane could be well described by a single retention and reaction rate constant (second Damköhler number) for fluxes from 1.6 to 16.2 L·m−2·h−1. The model furthermore indicates the potential synergy between membrane retention, which leads to increased concentration, and accompanying photocatalytic conversion, at the membrane surface.

Original languageEnglish
Article number117617
JournalChemical engineering science
Volume254
DOIs
Publication statusPublished - 8 Jun 2022

Keywords

  • AOP
  • Dead-end filtration
  • Methylene blue discoloration
  • Photocatalytic membrane
  • Radical filtration
  • TiO
  • Transport and surface reaction model
  • UT-Hybrid-D

Fingerprint

Dive into the research topics of 'Transport and surface reaction model of a photocatalytic membrane during the radical filtration of methylene blue'. Together they form a unique fingerprint.

Cite this