Vapor-Liquid Equilibrium For Water -Dimethyl Sulfoxide and
Dimethyl Sulfoxide -Acetic Acid System Model Parameter Fitting
Abstract: The deviation using refractometer to analyse the balance composition of dimethyl sulfoxide aqueous solution is big, exchange for with gas chromatography. The phase composit- ion of isobaric vapor-liquid equilibrium (VLE) data for water +dimethyl sulfoxide and dimethyl sulfoxide + acetic acid system was measured at 101.33kPa by using an improved Rose still, and the thermodynamic consistency of the experimental VLE data was satisfactory
Most of the activity coefficient model of VLE is the misalignment model, and the regressi- on of parameter is very difficult. In the past, we also used the Fortran,C and BASIC language to compilation the program, but the procedure was cumbersome and error-prone. Recent years,the powerful capabilities of MATLAB language started to apply in the calculation of engineering, MATLAB programming was easy, also the code was short and highly effective. Author used the MATLAB language to compile the model parameter regression procedures of Van Laar, Wilson, NRTL and 6 polynomials for the first time. Finally, the ant algorithm is a new and intelligent al -gorithm. In article, fitting parameters model of activity coefficient used by this algorithm, also done some exploration work.
The results showed that the analysis of gas chromatography was accurate, misalignment re- gression activity coefficient model parameter with the MATLAB toolbox function, The method simple and reliable, Four models can better be connected this system the vapor-liquid equilibri- um data, the obtained data could provide a basal data for the dimethyl sulfoxide’s purification, as well as for the design of the acetic acid’s extraction and rectification.
Key words: Vapor-Liquid Equilibrium;dimethyl sulfoxide(DMSO);
Ant group algorithm;Acetic Acid;MATLAB