Journal article
Heterogeneous and catalytic uptake of ozone on mineral oxides and dusts: A Knudsen cell investigation
Geophysical research letters, Vol.29(14), pp.10-1-10-4
07/2002
DOI: 10.1029/2002GL014896
Abstract
The uptake of ozone on various mineral powders has been studied using a Knudsen cell apparatus at T = 296 K. Samples included α‐Al
2
O
3
, α‐Fe
2
O
3
, SiO
2
, China loess and Saharan sand. Reactive uptake coefficients, γ
BET
, were measured for the various particles and found to be 8 ± 5 × 10
−5
for α‐Al
2
O
3
, 1.8 ± 0.7 × 10
−4
for α‐Fe
2
O
3
and 5 ± 3 × 10
−5
for SiO
2
. The authentic dust samples were found to have γ
BET
values of 2.7 ± 0.9 × 10
−5
for China loess and 6 ± 3 × 10
−5
for Saharan sand. Variations in the reactivity of the Saharan sand were observed as a function of sample treatment. Under the conditions of this study, heterogeneous uptake of ozone is catalytic and results in the destruction of ozone.
Details
- Title: Subtitle
- Heterogeneous and catalytic uptake of ozone on mineral oxides and dusts: A Knudsen cell investigation
- Creators
- A. E. Michel - University of IowaC. R. Usher - University of IowaV. H. Grassian - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.29(14), pp.10-1-10-4
- DOI
- 10.1029/2002GL014896
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Language
- English
- Date published
- 07/2002
- Academic Unit
- Chemistry; Chemical and Biochemical Engineering
- Record Identifier
- 9984936507102771
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