Study of effect of adsorptive building material on formaldehyde concentrations: Development of measuring methods and modeling of adsorption phenomena

Yuji Ataka, Shinsuke Kato, Shuzo Murakami, Qingyu Zhu, Kazuhide Ito, Tomohiro Yokota

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

In this paper, a method is developed to assess the performance of adsorptive building materials that are used for reducing indoor pollutant concentrations. Mass transfer has a great influence on the materials' performance. To control the mass transfer rate precisely in the performance test, the authors have developed the Boundary-Layer-Type Small Test Chamber in which airflow along the test materials can be controlled precisely. A new index of adsorption performance, the equivalent ventilation rate (Qads), is defined that corresponds to the mass transfer coefficient when the surface pollutant concentration is zero. Modeling and experimental verification of adsorption were done, demonstrating the pollutant concentration decrease caused by adsorptive building materials. The pollutant reduction phenomena were modeled, including pollutant degradation by chemical reaction and adsorption in building materials. Adsorption tests of gypsum board containing a substance that decomposes HCHO within the board are reported. The adsorption rate of the gypsum board predicted by numerical analysis (CFD, Computational Fluid Dynamics) corresponds well with experimental results.

Original languageEnglish
Pages (from-to)51-64
Number of pages14
JournalIndoor Air, Supplement
Volume14
Issue number8
Publication statusPublished - Dec 1 2004
Externally publishedYes

Fingerprint

Formaldehyde
Adsorption
Calcium Sulfate
Mass transfer
Gypsum
Hydrodynamics
Ventilation
Numerical analysis
Chemical reactions
Computational fluid dynamics
Boundary layers
Degradation

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Building and Construction
  • Public Health, Environmental and Occupational Health

Cite this

Study of effect of adsorptive building material on formaldehyde concentrations : Development of measuring methods and modeling of adsorption phenomena. / Ataka, Yuji; Kato, Shinsuke; Murakami, Shuzo; Zhu, Qingyu; Ito, Kazuhide; Yokota, Tomohiro.

In: Indoor Air, Supplement, Vol. 14, No. 8, 01.12.2004, p. 51-64.

Research output: Contribution to journalArticle

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