The role of tropospheric ice surfaces in the elimination of the CFC substitute, trifluoroethanol

Elena Moreno; Alfonso Aranda; Yolanda Díaz-de-Mera; Ernesto Martínez; Iván Bravo; Ana Rodríguez

doi:10.1039/C2CP23553F

The role of tropospheric ice surfaces in the elimination of the CFC substitute, trifluoroethanol

Elena Moreno,^a Alfonso Aranda,*^a Yolanda Díaz-de-Mera,^a Ernesto Martínez,^a Iván Bravo^b and Ana Rodríguez^b

* Corresponding authors

^a Facultad de Ciencias Químicas, Universidad de Castilla-La Mancha, Ciudad Real, Spain
E-mail: alfonso.aranda@uclm.es

^b Instituto de Ciencias Ambientales (ICAM). Universidad de Castilla-La Mancha, Toledo, Spain

Abstract

This work provides uptake results of CF₃CH₂OH on ice over the temperature range 203–223 K using a coated wall flow tube coupled to mass spectrometric detection. For experiments over pure ice, the adsorption was fully reversible and the data could be described in terms of the Langmuir isotherm for the range of concentrations and temperatures studied. For this temperature range, ΔH^o_ads = −46 ± 16 kJ mol⁻¹ was obtained (error is 2σ + 5%). For experiments on doped ice with nitric acid over the temperature range 203–223 K, the number of adsorbed molecules was slightly lower than over pure ice. At temperatures above 231 K, the extent of the reversible uptake of CF₃CH₂OH is enhanced in the presence of nitric acid due to coexistence of a liquid solution phase. Under such conditions the obtained solubility data follow Henry's law. Although pure ice and acid doped water surfaces do not permanently scavenge CF₃CH₂OH, the partitioning of CF₃CH₂OH between the gas phase and aqueous condensed phases may play a role as reservoirs or as a means of transport in the troposphere.

Article information

https://doi.org/10.1039/C2CP23553F

Article type

Paper

Submitted

11 Nov 2011

Accepted

06 Feb 2012

First published

07 Feb 2012

Download Citation

Phys. Chem. Chem. Phys., 2012,14, 4425-4432

Permissions

Request permissions

The role of tropospheric ice surfaces in the elimination of the CFC substitute, trifluoroethanol

E. Moreno, A. Aranda, Y. Díaz-de-Mera, E. Martínez, I. Bravo and A. Rodríguez, Phys. Chem. Chem. Phys., 2012, 14, 4425 DOI: 10.1039/C2CP23553F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Physical Chemistry Chemical Physics

The role of tropospheric ice surfaces in the elimination of the CFC substitute, trifluoroethanol

Abstract

Article information

Download Citation

Permissions

The role of tropospheric ice surfaces in the elimination of the CFC substitute, trifluoroethanol

Social activity

Search articles by author

Spotlight

Advertisements