DOI: 10.1615/ICHMT.1992.IntSympImgTranspProc
ISBN Print: 978-1-56700-012-2
IMAGING OF GAS TRANSFER ACROSS GAS-LIQUID INTERFACES
要約
Mass transfer across gas−liquid interfaces are of importance in both the natural and technical environment. The exchange of gases between the atmosphere and the oceans determines the global distribution of many chemical species. Reaeration of lakes and rivers across the water surface is a critical process for the ecology of these environments, especially if they show high biological activity. Mass transfer across gas−liquid interfaces is of importance in gas−liquid reactors of various kinds such as bubble and falling films columns. A detailed state of the art review of air-water mass transfer can be found in [5].
Knowledge about the mechanisms of the transfer process across a gas-liquid interface is still very poor, mainly due to the underdeveloped measuring technology. It is still state-of-the-art to use various mass balance methods to determine the mean flux density across the interface, or even only the rate constant and to perform empirical or semi−empirical parameterization. With a few exceptions there are hardly any experimental techniques available which perform measurements within the aqueous mass boundary layer.