Computational fluid dynamics modeling and parameterization of the visible light photocatalytic oxidation process of toluene for indoor building material

Koki Nakahara, Takahiro Yamaguchi, Eunsu Lim, Kazuhide Ito

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Poor indoor environmental conditions caused by the presence of gas-phase/aerosol-phase contaminants are thought to be potential triggers of illnesses, leading to productivity losses. In recent decades, the photocatalytic oxidation (PCO) process has attracted attention because of its potential to purify indoor air polluted with volatile organic compounds (VOCs), especially at low concentration levels. Titanium-dioxide (TiO2)-bound building materials have been extensively studied for the oxidation of indoor VOCs. In this study, kinetic studies were carried out to evaluate the PCO of toluene in the gas phase, over TiO2-bound building materials, using a 20 l small test chamber. A Langmuir–Hinshelwood (L–H)-type model, for reproducing the PCO process over TiO2-bound building materials, was developed as a function of the toluene concentration, illumination intensity, and humidity levels. The parameters of the L–H model were determined using the hybrid identification procedure of computational fluid dynamics (CFD) simulations and a 20 l small test chamber experiment. By using this hybrid identification method, PCO kinetic parameters were estimated with reference to the concentration in viscous-sub layer. Finally, CFD simulations were also carried out under the same boundary conditions as those used in the chamber experiments to evaluate the prediction accuracy.

Original languageEnglish
Pages (from-to)298-308
Number of pages11
JournalSustainable Cities and Society
Volume35
DOIs
Publication statusPublished - Nov 1 2017

Fingerprint

Parameterization
computational fluid dynamics
chamber
toluene
Toluene
parameterization
Computational fluid dynamics
oxidation
Oxidation
modeling
simulation
Volatile organic compounds
experiment
volatile organic compound
environmental factors
illness
kinetics
productivity
air
identification method

All Science Journal Classification (ASJC) codes

  • Geography, Planning and Development
  • Civil and Structural Engineering
  • Renewable Energy, Sustainability and the Environment
  • Transportation

Cite this

Computational fluid dynamics modeling and parameterization of the visible light photocatalytic oxidation process of toluene for indoor building material. / Nakahara, Koki; Yamaguchi, Takahiro; Lim, Eunsu; Ito, Kazuhide.

In: Sustainable Cities and Society, Vol. 35, 01.11.2017, p. 298-308.

Research output: Contribution to journalArticle

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