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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 From the last relation, it follows that the dependence of the current in the electrolyzer is defined as the design parameters, in particular, the areas of anode and cathode S, the distance between electrodes d, and process parameters: n - concentration of brine ni and temperature T, μ – dynamic viscosity. Equation (13) also makes it possible to determine the temperature dependence of the current, voltage characteristic of the electrolyzer, taking into account changes of viscosity of the electrolyte when the temperature changes (Figure 1.). Knowing the dependence of the current on the design and process parameters, it is possible to determine electrolyzer performance and specific energy costs G (J / kg) (fig.2,3). GCl = U ;GH = U ;GNaOH = U , (14) kCl kH kNaOH where U - voltage on the electrolyzer determined at a predetermined current according to formula (13). 170 160 150 140 130 120 110 100 90 80 I, 5 mm I, 6 mm I, 7 mm 55 60 65 70 75 80 85 T, 0C Figure 1.Dependence of the current on temperature in the electrolyzer at a fixed inter-electrode distance and the voltage of 3.65 V. From formula (13), it follows that for a specified current in the cell, the voltage on the electrodes is determined by formula 11 6πμd epe 2 3πε0pekT2 pe U=⋅1++I. (15) 2 6πεkT 2 2e nteS 0 2e From which it follows that with the increase of temperature of the electrolyte the voltage decreases. Figure 4 shows the temperature dependence of the voltage on fixed current values when the inter- electrode distance is 5 mm. 4 I, кАPDF Image | electrolysis production of caustic chlorine and hydrogen
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