electrolysis production of caustic chlorine and hydrogen

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electrolysis production of caustic chlorine and hydrogen ( electrolysis-production-caustic-chlorine-and-hydrogen )

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International Conference on Information Technologies in Business and Industry 2016 IOP Publishing IOP Conf. Series: Journal of Physics: Conf. Series 803 (2017) 012148 doi:10.1088/1742-6596/803/1/012148 μ  μHO2R3 m = Na1+ 2  C, (5) (6) – characteristic H2O Nμd A Na2 Cl 2 diameter of molecule H2O; NА = 6.02 ∙ 1023 1/mol – Avogardo’s constant. Na HO μ  μHO2R 3 m = Cl1+ 2  C, Nμd A Cl2 HO where μNa , μCl , μH O - molar weight of Na, Cl, H2O, respectively; d From the solutions of equations (2) and (3), we can determine the speed of movement of sodium and chloride ions in the interelectrode space: θNa = θCl = Na Cl the ions can be calculated by formulas θNa = eU ;θCl = eU . eU t 1−exp− , (7) 6πμrNad  τNa eU t 1−exp− , (8) 6πμr d τ Cl Cl whereτNa,τCl – the time of "acceleration" of sodium and chloride ions in the electric field. τ = mNa , (9) 6πμrNa τ = mCl . (10) ConsideringthatτNa <<1,τCl <<1, sothat exp−τ <<1and exp−τ  Na   <<1,thevelocityof Cl  (11) 6πμrCl t t 6πμrNad 6πμrCld Knowing the velocity of directional motion of the ions, let us determine the dependence of the current in the electrolyzer from structural and technological parameters of the process: e2Sn n I =  Na + Cl U . (12)  Na Cl 6πμd  r r Considering that the concentration of chlorine ions in the electrolyte solution of sodium is practically the same and is determined by the concentration of NaCl in the brine, this relation can be written as I = nie2S ⋅ U . (13) 6πμd 1 1  e p e  2  3π ε 0 p e k T  2 p e  1+ + 6πε kT  3  0  2e   2e 3

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