Thermodynamics of the Formaldehyde−Water and Formaldehyde−Ice Systems for Atmospheric Applications
International audience Formaldehyde (HCHO) is a species involved in numerous key atmospheric chemistry processes that can significantly impact the oxidative capacity of the atmosphere. Since gaseous HCHO is soluble in water, the water droplets of clouds and the ice crystals of snow exchange HCHO wit...
Published in: | The Journal of Physical Chemistry A |
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Main Authors: | , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://insu.hal.science/insu-00646612 https://doi.org/10.1021/jp108907u |
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ftunivsavoie:oai:HAL:insu-00646612v1 |
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Université Savoie Mont Blanc: HAL |
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English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
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[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Barret, M. Houdier, S. Domine, F. Thermodynamics of the Formaldehyde−Water and Formaldehyde−Ice Systems for Atmospheric Applications |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Formaldehyde (HCHO) is a species involved in numerous key atmospheric chemistry processes that can significantly impact the oxidative capacity of the atmosphere. Since gaseous HCHO is soluble in water, the water droplets of clouds and the ice crystals of snow exchange HCHO with the gas phase and the partitioning of HCHO between the air, water, and ice phases must be known to understand its chemistry. This study proposes thermodynamic formulations for the partitioning of HCHO between the gas phase and the ice and liquid water phases. A reanalysis of existing data on the vapor−liquid equilibrium has shown the inadequacy of the Henry's law formulation, and we instead propose the following equation to predict the mole fraction of HCHO in liquid water at equilibrium, XHCHO,liq, as a function of the partial pressure PHCHO (Pa) and temperature T (K): XHCHO,liq = 1.700 × 10−15 e(8014/T)(PHCHO)1.105. Given the paucity of data on the gas−ice equilibrium, the solubility of HCHO and the diffusion coefficient (DHCHO) in ice were measured by exposing large single ice crystals to low PHCHO. Our recommended value for DHCHO over the temperature range 243−266 K is DHCHO = 6 × 10−12 cm2 s−1. The solubility of HCHO in ice follows the relationship XHCHO,ice = 9.898 × 10−13 e(4072/T)(PHCHO)0.803. Extrapolation of these data yields the PHCHO versus 1/T phase diagram for the H2O−HCHO system. The comparison of our results to existing data on the partitioning of HCHO between the snow and the atmosphere in the high arctic highlights the interplay between thermodynamic equilibrium and kinetics processes in natural systems. |
author2 |
CHANG (CHANG) Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS) LEFE-CHAT program |
format |
Article in Journal/Newspaper |
author |
Barret, M. Houdier, S. Domine, F. |
author_facet |
Barret, M. Houdier, S. Domine, F. |
author_sort |
Barret, M. |
title |
Thermodynamics of the Formaldehyde−Water and Formaldehyde−Ice Systems for Atmospheric Applications |
title_short |
Thermodynamics of the Formaldehyde−Water and Formaldehyde−Ice Systems for Atmospheric Applications |
title_full |
Thermodynamics of the Formaldehyde−Water and Formaldehyde−Ice Systems for Atmospheric Applications |
title_fullStr |
Thermodynamics of the Formaldehyde−Water and Formaldehyde−Ice Systems for Atmospheric Applications |
title_full_unstemmed |
Thermodynamics of the Formaldehyde−Water and Formaldehyde−Ice Systems for Atmospheric Applications |
title_sort |
thermodynamics of the formaldehyde−water and formaldehyde−ice systems for atmospheric applications |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://insu.hal.science/insu-00646612 https://doi.org/10.1021/jp108907u |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 1089-5639 EISSN: 1520-5215 Journal of Physical Chemistry A https://insu.hal.science/insu-00646612 Journal of Physical Chemistry A, 2010, 115 (3), pp.307-317. ⟨10.1021/jp108907u⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp108907u insu-00646612 https://insu.hal.science/insu-00646612 doi:10.1021/jp108907u |
op_doi |
https://doi.org/10.1021/jp108907u |
container_title |
The Journal of Physical Chemistry A |
container_volume |
115 |
container_issue |
3 |
container_start_page |
307 |
op_container_end_page |
317 |
_version_ |
1797579001778143232 |
spelling |
ftunivsavoie:oai:HAL:insu-00646612v1 2024-04-28T08:11:46+00:00 Thermodynamics of the Formaldehyde−Water and Formaldehyde−Ice Systems for Atmospheric Applications Barret, M. Houdier, S. Domine, F. CHANG (CHANG) Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS) LEFE-CHAT program 2010-12-21 https://insu.hal.science/insu-00646612 https://doi.org/10.1021/jp108907u en eng HAL CCSD American Chemical Society info:eu-repo/semantics/altIdentifier/doi/10.1021/jp108907u insu-00646612 https://insu.hal.science/insu-00646612 doi:10.1021/jp108907u ISSN: 1089-5639 EISSN: 1520-5215 Journal of Physical Chemistry A https://insu.hal.science/insu-00646612 Journal of Physical Chemistry A, 2010, 115 (3), pp.307-317. ⟨10.1021/jp108907u⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2010 ftunivsavoie https://doi.org/10.1021/jp108907u 2024-04-11T00:18:28Z International audience Formaldehyde (HCHO) is a species involved in numerous key atmospheric chemistry processes that can significantly impact the oxidative capacity of the atmosphere. Since gaseous HCHO is soluble in water, the water droplets of clouds and the ice crystals of snow exchange HCHO with the gas phase and the partitioning of HCHO between the air, water, and ice phases must be known to understand its chemistry. This study proposes thermodynamic formulations for the partitioning of HCHO between the gas phase and the ice and liquid water phases. A reanalysis of existing data on the vapor−liquid equilibrium has shown the inadequacy of the Henry's law formulation, and we instead propose the following equation to predict the mole fraction of HCHO in liquid water at equilibrium, XHCHO,liq, as a function of the partial pressure PHCHO (Pa) and temperature T (K): XHCHO,liq = 1.700 × 10−15 e(8014/T)(PHCHO)1.105. Given the paucity of data on the gas−ice equilibrium, the solubility of HCHO and the diffusion coefficient (DHCHO) in ice were measured by exposing large single ice crystals to low PHCHO. Our recommended value for DHCHO over the temperature range 243−266 K is DHCHO = 6 × 10−12 cm2 s−1. The solubility of HCHO in ice follows the relationship XHCHO,ice = 9.898 × 10−13 e(4072/T)(PHCHO)0.803. Extrapolation of these data yields the PHCHO versus 1/T phase diagram for the H2O−HCHO system. The comparison of our results to existing data on the partitioning of HCHO between the snow and the atmosphere in the high arctic highlights the interplay between thermodynamic equilibrium and kinetics processes in natural systems. Article in Journal/Newspaper Arctic Université Savoie Mont Blanc: HAL The Journal of Physical Chemistry A 115 3 307 317 |