Heterogeneous Uptake of Gaseous Nitric Acid on Dolomite (CaMg(CO3)2) and Calcite (CaCO3) Particles:  A Knudsen Cell Study Using Multiple, Single, and Fractional Particle Layers

2005 ◽  
Vol 109 (31) ◽  
pp. 6901-6911 ◽  
Author(s):  
Elizabeth R. Johnson ◽  
Joanna Sciegienka ◽  
Sofia Carlos-Cuellar ◽  
Vicki H. Grassian
Keyword(s):  
Nitric Acid ◽  
Knudsen Cell ◽  
Cell Study

A Knudsen Cell Study of the Heterogeneous Reactivity of Nitric Acid on Oxide and Mineral Dust Particles

2001 ◽  
Vol 105 (27) ◽  
pp. 6609-6620 ◽  
Author(s):  
G. M. Underwood ◽  
P. Li ◽  
H. Al-Abadleh ◽  
V. H. Grassian
Keyword(s):  
Nitric Acid ◽  
Mineral Dust ◽  
Knudsen Cell ◽  
Dust Particles ◽  
Heterogeneous Reactivity ◽  
Cell Study

Mass spectrometric-Knudsen cell study of the gaseous oxides of platinum

1967 ◽  
Vol 71 (11) ◽  
pp. 3686-3689 ◽  
Author(s):  
John H. Norman ◽  
H. Gene Staley ◽  
Wayne Elliot Bell
Keyword(s):  
Mass Spectrometric ◽  
Knudsen Cell ◽  
Cell Study

Heterogeneous reactions of soot aerosols with nitrogen dioxide and nitric acid: atmospheric chamber and Knudsen cell studies

2002 ◽  
Vol 36 (36-37) ◽  
pp. 5729-5740 ◽  
Author(s):  
A.Preszler Prince ◽  
J.L. Wade ◽  
V.H. Grassian ◽  
P.D. Kleiber ◽  
M.A. Young
Keyword(s):  
Nitric Acid ◽  
Nitrogen Dioxide ◽  
Heterogeneous Reactions ◽  
Knudsen Cell ◽  
Atmospheric Chamber

Knudsen Cell Studies of the Reaction of Gaseous Nitric Acid with Synthetic Sea Salt at 298 K

1997 ◽  
Vol 101 (51) ◽  
pp. 9993-9999 ◽  
Author(s):  
D. O. De Haan ◽  
B. J. Finlayson-Pitts
Keyword(s):  
Nitric Acid ◽  
Sea Salt ◽  
Knudsen Cell

scholarly journals DRIFTS and Knudsen cell study of the heterogeneous reactivity of SO<sub>2</sub> and NO<sub>2</sub> on mineral dust

2003 ◽  
Vol 3 (6) ◽  
pp. 2043-2051 ◽  
Author(s):  
M. Ullerstam ◽  
M. S. Johnson ◽  
R. Vogt ◽  
E. Ljungström
Keyword(s):  
Gas Phase ◽  
Loss Rate ◽  
Mineral Dust ◽  
Knudsen Cell ◽  
Heterogeneous Oxidation ◽  
Heterogeneous Reactivity ◽  
Significant Difference ◽  
Phase Loss ◽  
Diffuse Reflectance Infrared ◽  
Cell Study

Abstract. The heterogeneous oxidation of SO2 by NO2 on mineral dust was studied using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and a Knudsen cell. This made it possible to characterise, kinetically, both the formation of sulfate and nitrate as surface products and the gas phase loss of the reactive species. The gas phase loss rate was determined to be first order in both SO2 and NO2. From the DRIFTS experiment the uptake coefficient, g, for the formation of sulfate was determined to be of the order of 10-10 using the BET area as the reactive surface area. No significant formation of sulfate was seen in the absence of NO2. The Knudsen cell study gave uptake coefficients of the order of 10-6 and 10-7 for SO2 and NO2 respectively. There was no significant difference in uptake when SO2 or NO2 were introduced individually compared to experiments in which SO2 and NO2 were present at the same time.

scholarly journals DRIFTS and Knudsen cell study of the heterogeneous reactivity of SO<sub>2</sub> and NO<sub>2</sub> on mineral dust

2003 ◽  
Vol 3 (4) ◽  
pp. 4069-4096
Author(s):  
M. Ullerstam ◽  
M. S. Johnson ◽  
R. Vogt ◽  
E. Ljungström
Keyword(s):  
Gas Phase ◽  
Loss Rate ◽  
Mineral Dust ◽  
Knudsen Cell ◽  
Heterogeneous Oxidation ◽  
Heterogeneous Reactivity ◽  
Significant Difference ◽  
Phase Loss ◽  
Diffuse Reflectance Infrared ◽  
Cell Study

Abstract. The heterogeneous oxidation of SO2 by NO2 on mineral dust was studied using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and a Knudsen cell. This made it possible to characterise, kinetically, both the formation of sulfate and nitrate as surface products and the gas phase loss of the reactive species. The gas phase loss rate was determined to be first order in both SO2 and NO2. From the DRIFTS experiment the uptake coefficient, γ, for the formation of sulfate was determined to be of the order of 10−10 using the BET area as the reactive surface area. No significant formation of sulfate was seen in the absence of  NO2. The Knudsen cell study gave uptake coefficients of the order of 10−6 and 10-7 for SO2 and NO2, respectively. There was no significant difference in uptake when SO2 or NO2 were introduced individually compared to experiments in which SO2 and NO2 were present at the same time.

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