Abstract
AbstractAn investigation has been made of gas absorption characteristics in unstable vertical slug flow. The process studied was the absorption of hexane from an inert carrier gas into paraffin oil. Gas‐phase properties were varied by use of nitrogen, helium and Freon‐14 as carriers, while variation of liquid‐phase properties was achieved by using light and heavy paraffin oils and their mixtures. Absorption efficiencies were high, ranging from 0.75 to 0.99 The values depended not only on operating and system variables, but also on absorber geometry with a distinct discontinuity being observed when the overall mass transfer efficiency was plotted against absorber length H. This discontinuity was particularly marked for the heavy paraffin oil and was found to be related to the variation of slug surface area with H. Flow rates and system properties were found to affect the mass transfer coefficients and a comparison of experimental values with those predicted by the penetration theory suggested that not all the slug surface area was effective in mass transfer.
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