Simulation Of Separating Hydrogen Isotopes Using Combined Electrolytic Cstalysis Exchange

Nuclear fission reactions produce hydrogen isotopes,and nuclear fusion requires hydrogen isotopes as fuel.Hydrogen isotopes are widely used in daily life and military industry.Therefore,hydrogen isotope separation technology becomes very important.In this paper,hydrogen isotopes are separated by the method of combined electrolytic catalytic exchange（CECE）.The separation coefficient is large and the system can be operated at room temperature.By using Matlab software,the whole process of the exchange is simulated.In the simulation process,the size of the separation factor,the size of the catalyst and the mass transfer coefficient of the catalyst,the temperature and so on can be used to analyze the effect of different conditions on the whole isotopic exchange.In this paper,the theoretical model of gas-vapor-liquid three phase transfer is adopted,and the Moffrey plate efficiency,operation line and balance line are refined to make the whole simulation result more accurate.The feed volume is F=0.7L/h;the feed position is N_F=25;the deuterium concentration in the feed liquid phase is X_FD=0.999;the feed liquid liquid phase is X_FT=10^-8Bq/mol.The thickness of the column is h_cat=0.008m;the thickness of the packing layer is h_scr=0.008m;the running temperature is T=348K and the 50 layers are simulated.The simulation results are compared with the Russian literature,the results are accurate and true,but also confirms the use of the theoretical model and the correctness of the procedures written.Using this procedure,the parameters were debugged and the distribution of the inlet and outlet concentrations of the LPCE column and the distribution curve of the hydrogen isotope concentration throughout the column were obtained.The simulation results show that the feed solution will have a great influence on the liquid concentration,and the liquid concentration will change at the feed liquid position,and the gas concentration does not change much at the feed liquid position.Improving the performance of the catalyst and filler will improve the separation efficiency of the whole exchange column,and the increase of the mass transfer coefficient of the catalyst has a greater effect on the separation efficiency.Changing the temperature will also affect the separation efficiency,the separation factor increases,the separation efficiency of the exchange column increases.The optimum feed solution position will vary with the experimental conditions and parameters.Increasing the airflow ratio also increases the separation efficiency of the exchange column.And then a nuclear power plant containing tritium wastewater treatment,under certain conditions to achieve a multiple of 20 times the concentration of trituration rate of 90%,the required calculation of the required exchange column height of 2.08m.