ON THE MURPHREE EFFICIENCIES IN THE SIMULATION OF MULTICOMPONENT DISTILLATION COLUMN:THE BIZARRE BEHAVIOUR AND THE ESTIMATION METHODS

The composition profiles in an I.D.30mm Oldershaw distillation column with 6 plates at total reflux weremeasured for two ternary systems,ethanol/chloroform/n-hexane and cyclohexane/n-heptane/toluene.Somecomponent effieiencies exhibit the bizarre behaviour,exceeding the normal range(0,1),at the plates near theextreme points of the concentration profiles of the components.The possible relationship between the extremeof the profiles and the bizarre values of component efficiencies has been analysed,and the feasibility and availa-bility of some approaches for the estimation of the component efficiencies are discussed.     

REMOVAL OF BORON FROM BALÇOVA-IZMIR GEOTHERMAL WATER BY ION EXCHANGE PROCESS: BATCH AND COLUMN STUDIES

In this study, the efficiency of boron removal from Balçova geothermal water provided by the Izmir Geothermal Energy Company, Turkey, has been investigated using boron selective ion exchange resins Diaion CRB 02 and Dowex (XUS 43594.00) by batch and column methods. The results of the column studies have been evaluated in terms of type of resin and feed flow rate, and the effects of particle size and temperature have been investigated using the results obtained from batch kinetic studies. The data from the kinetic studies have been evaluated using pseudo-first-order and pseudo-second-order kinetics models. In addition, the classical diffusion models have been used to evaluate the kinetic data obtained to understand the rate-controlling mechanisms.