Ion chemistry of Clono{sub 2} involving NO{sub 3}{sup -} core ions: A detection scheme for Clono{sub 2} in the atmosphere
- Hanscom Air Force Base, MA (United States)
- College of the Holy Cross, Worcester, MA (United States)
Rate constants and product branching ratios for reactions involving atmospherically interesting ions and ClONO{sub 2} have been measured. H{sub 3}O{sup +} reacts rapidly with ClONO{sub 2}, but hydrates of H{sub 3}O{sup +} do not. This implies that ClONO{sub 2} does not play a central role in the positive ion chemistry of the atmosphere. CO{sub 3}{sup -} reacts with ClONO{sub 2} to form NO{sub 3}{sup -}. Both NO{sub 3}{sup -} (H{sub 2}O) react with ClONO{sub 2} to form NO{sub 3}{sup -} (ClONO{sub 2}). H{sub 2}O does not react with NO{sub 3}{sup -} (ClONO{sub 2}), which is essential to the proposed in situ measurement technique. NO{sub 3}{sup -} (ClONO{sub 2})does react with HNO{sub 3} and HCl, producing NO{sub 3}{sup -} (HNO{sub 3}) in both cases. The reaction of NO{sub 3}{sup -} (HCl) with ClONO{sub 2} also produces NO{sub 3}{sup -} (HNO{sub 3}). These latter two efficient reactions, which are discussed in detail in a separate publication, are analogous to the efficient neutral heterogeneous reaction of HCl with ClONO{sub 2} which is important in the chemistry of the Antarctic stratosphere. A detection scheme is presented for atmospheric ClONO{sub 2} based on the reactions studied and utilizing mass spectrometry. A ClONO{sub 2} detection limit of 10{sup 7} molecules cm{sup -3} is estimated based on the operating characteristics of current ion-molecule based mass spectrometric field instruments. 19 refs., 1 tab.
- OSTI ID:
- 136240
- Journal Information:
- Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: D4 Vol. 99; ISSN JGREA2; ISSN 0148-0227
- Country of Publication:
- United States
- Language:
- English
Similar Records
Exploration of the mechanism of the activation of ClONO{sub 2} by HCl in small water clusters using electronic structure methods
Heterogeneous interactions of ClONO{sub 2} and HCl on nitric acid trihydrate at 202 K