COMBINED MASS AND HEAT-TRANSFER DURING NONISOTHERMAL ABSORPTION IN GAS-LIQUID SLUG FLOW

A model of combined mass and heat transfer during nonisothermal gas ab sorption from a slug rising in a channel filled with liquid is suggest ed. The expressions for coefficients of heat and mass transfer from a single slug are derived in the approximation of the thin concentration and heat boundary layers in a liquid phase. Under the assumptions of a perfect mixing of the dissolved gas in liquid plugs and uniform temp erature distribution in liquid plugs, recurrent relations for the diss olved gas concentration and temperature in the n-th liquid plug and ma ss and heat fluxes from the n-th gas slug are derived. The total mass and heat fluxes in a gas-liquid slug flow are determined. In the limit ing case of absorption without heat release the derived formulas recov er the expressions for isothermal absorption in a gas-liquid slug flow .