Overall Kinetics of Heterogeneous Elemental Mercury Reactions on TiO 2 Sorbent Particles with UV Irradiation

Tai Gyu Lee, Pratim Biswas, Elizabeth Hedrick

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The kinetics of gas-phase elemental mercury (Hg0) oxidation on titania particle surfaces in the presence of UV irradiation was established. Overall reaction orders with respect to the gas-phase mercury concentration (α) and the UV intensity (β) were found to be 1.4 ± 0.1 and 0.35 ± 0.05 for the differential bed reactor, whereas values of α and β were 1.1 ± 0.1 and 0.39 for the aerosol flow reactor (AFR). While the values are similar, the AFR results are more representative of the practical sorbent process. In the low-temperature range (<80°C), the overall rate of initial mercury uptake increased as the temperature increased, indicating that it was a reaction-controlled process. At higher temperatures (>110°C), an increase of the temperature resulted in a decrease of the overall reaction rate, indicating an adsorption-controlled process.

Original languageEnglish
Pages (from-to)1411-1417
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume43
Issue number6
Publication statusPublished - 2004 Mar 17

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Sorbents
Aerosols
Mercury
Gases
Irradiation
Kinetics
Mercury (metal)
Reaction rates
Titanium
Adsorption
Oxidation
Temperature
titanium dioxide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

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abstract = "The kinetics of gas-phase elemental mercury (Hg0) oxidation on titania particle surfaces in the presence of UV irradiation was established. Overall reaction orders with respect to the gas-phase mercury concentration (α) and the UV intensity (β) were found to be 1.4 ± 0.1 and 0.35 ± 0.05 for the differential bed reactor, whereas values of α and β were 1.1 ± 0.1 and 0.39 for the aerosol flow reactor (AFR). While the values are similar, the AFR results are more representative of the practical sorbent process. In the low-temperature range (<80°C), the overall rate of initial mercury uptake increased as the temperature increased, indicating that it was a reaction-controlled process. At higher temperatures (>110°C), an increase of the temperature resulted in a decrease of the overall reaction rate, indicating an adsorption-controlled process.",
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Overall Kinetics of Heterogeneous Elemental Mercury Reactions on TiO 2 Sorbent Particles with UV Irradiation. / Lee, Tai Gyu; Biswas, Pratim; Hedrick, Elizabeth.

In: Industrial and Engineering Chemistry Research, Vol. 43, No. 6, 17.03.2004, p. 1411-1417.

Research output: Contribution to journalArticle

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