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 journalArticlepeer-review

33 Scopus citations


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 (US)
Pages (from-to)1411-1417
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Issue number6
StatePublished - Mar 17 2004
Externally publishedYes

ASJC Scopus subject areas

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


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