Continuous-membrane column modeling

One of the next steps in developing the continuous membrane column will be to obtain extensive data on multicomponent systems. Some preliminary experiments with a C02 CH -N2 mixture using a stripper have already been conducted. The results of two such experiments are presented in Figures 3 and 4. The agreement between experiment and model is excellent. 

For demonstration purposes, a simple constant relative permeability flux model is employed to determine the continually changing retentate flow. Various possible operating conditions of a CS are explored. Using the difference point equation, column profiles for each condition can be plotted. The behavior of the profiles is discussed both mathematically and graphically. This innovative way of investigating membrane processes provides a unique way of synthesizing and designing them. 

This benchmark publication was followed by a series of developments that continues to this day in the evolution of IC as a trace determinative technique. The Dionex Corporation was formed out of these developments from Dow Chemical in the mid-1970s and this company has been quite an innovator in the manufacture of instrumentation for suppressed IC. From the earlier model such as the 10 to the 20001 to the DX 500 from the cation-exchange column to the hollow-fiber cation suppressor to the micro-membrane cation suppressor to the self-regenerate cation suppression for anion analysis and now to their just add water slogan, Dionex Corporation has made considerable advances in IC technology. A nonsuppressed form of IC also developed during the 1970s. To quote from the author s abstract of this benchmark paper (97) ... 

---