On the use of the imperfect tracer pulse method for determination of hold‐up and axial mixing

Abstract

AbstractThe imperfect pulse method is a powerful technique for experimental analysis of chemical engineering flow systems. The authors have employed this method in studies of holdup and mixing in gas‐liquid fluidized beds. In the present paper are discussed two problems connected with reduction of the experimental data obtained in such studies.Tailing is a phenomenon that may seriously affect the accuracy of mixing coefficients determined by the imperfect pulse method. Accurate methods of data reduction, based upon analysis of moments, have been developed, and their applicability is demonstrated by analysis of experimental data.Interphase transfer of tracer material is of particular importance in investigations of gas phase mixing in a gas‐liquid system where absorption of tracer gas into the liquid phase normally takes place. A semiempirical method is described for correction of the experimental data in such cases.