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Reactive uptake and hydration experiments on amorphous carbon treated with NO 2 , SO 2 , O 3 , HNO 3 , and H 2 SO 4
Author(s) -
Rogaski C. A.,
Golden D. M.,
Williams L. R.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl00093
Subject(s) - amorphous solid , carbon fibers , amorphous carbon , sulfuric acid , nitrogen , reactivity (psychology) , analytical chemistry (journal) , condensation , knudsen number , atmosphere (unit) , soot , materials science , carbon monoxide , inorganic chemistry , chemistry , environmental chemistry , catalysis , organic chemistry , combustion , thermodynamics , composite number , composite material , medicine , alternative medicine , physics , pathology
The reactivity and hydration properties of amorphous carbon were studied in a low‐pressure Knudsen cell reactor at room temperature (298 K). Reactions of NO 2 (γ=0.11±0.04) and HNO 3 (γ=0.038±0.008) were observed and may be important for nitrogen partitioning in the atmosphere. Water uptake was measured before and after exposure to various gases. Treating the amorphous carbon with NO 2 and O 3 does not alter the H 2 O uptake, while treatment with SO 2 , HNO 3 , and H 2 SO 4 significantly increases the H 2 O uptake. The experimental results support current assumptions in jet aircraft plume models that sulfuric acid condensation is involved in the activation of soot particles as condensation nuclei.

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