Thermal Reactions Between Sulfur Dioxide and H2O2 and their Relevance to the Jovian Icy Satellites and Other Small Bodies

Details Thermal Reactions Between Sulfur Dioxide and H2O2 and their Relevance to the Jovian Icy Satellites and Other Small Bodies Thermal Reactions Between Sulfur Dioxide and H2O2 and their Relevance to the Jovian Icy Satellites and Other Small Bodies

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p31f..08l&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P31F-08

Other

[5422] Planetary Sciences: Solid Surface Planets / Ices, [6020] Planetary Sciences: Comets And Small Bodies / Ices, [6060] Planetary Sciences: Comets And Small Bodies / Radiation And Chemistry, [6221] Planetary Sciences: Solar System Objects / Europa

Scientific paper

Laboratory experiments have demonstrated that magnetospheric radiation in the Jovian system drives reaction chemistry in ices at temperatures relevant to Europa and other icy satellites. Here we present new results on thermally-induced reactions occurring between 50 and 130 K in solid H2O-H2O2-SO2 samples. In our studies, we find that warming our three component mixtures induces a thermal reaction that produces SO42-, and this reaction appears to consume equal amounts of H2O2 and SO2. We suspect that the results may explain some of the observations related to the presence and distribution of H2O2 across Europa's surface as well as the lack of H2O2 on Ganymede and Callisto. If other molecules prove to be reactive with H2O2 at these or at even lower temperatures, then it may also explain why H2O2 has been absent from surfaces of many of the small icy bodies that are known to be exposed to ionizing radiation.

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