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The measurement of the sink properties of triethanolamine (TEA) as a coating for collecting NO2 by using annular diffusion denuders.

Environmental technology (2012-06-23)
Francesca Vichi, Franco De Santis
ABSTRACT

This study evaluates the use oftriethanolamine (TEA) as an alternative to routinely used active carbon employed as a coating for collecting NO2 on a diffusion denuder. The study is based on laboratory experiments made by using annular diffusion denuders coated with TEA. The pre-exponential and exponential factors for the first term of the Gormley-Kennedy equation applied to annular geometry were estimated and compared with the corresponding values for other coatings used in previous studies published in the literature. It was found that TEA does not behave as a perfect sink in comparison with other coatings such as treated active carbon and alkaline guaiacol.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Triethanolamine, ≥99.0% (GC)
Sigma-Aldrich
Triethanolamine, reagent grade, 98%
Sigma-Aldrich
Guaiacol, natural, ≥99%, FG
Sigma-Aldrich
Guaiacol, oxidation indicator
Supelco
Guaiacol, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
Triethanolamine, puriss. p.a., ≥99% (GC)
Sigma-Aldrich
Triethanolamine hydrochloride, ≥99.5% (titration)
Sigma-Aldrich
Triethanolamine, BioUltra, ≥99.5% (GC)
Sigma-Aldrich
Triethanolamine, puriss., meets analytical specification of NF, ≥99% (GC)
Sigma-Aldrich
Triethanolamine hydrochloride, BioXtra, ≥99.5% (titration)