Electrolysis process and the real costs of production

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Electrolysis process and the real costs of production ( electrolysis-process-and-real-costs-production )

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Component Use per ton neCl2 Unit cost Cost range per tonne Cl2 % of total costs Electricity - electrolysis unit 2.10 - 3.00 MWh € 34-86 € 71.4 - 258 50.6 - 51.1 - rest of plant 0.02 - 0.38 MWh € 34-86 € 0.70 - 32.7 0.5 - 6.5 Salt 1.65 - 1.75 ton € 15-50 € 24.8 - 87.5 17.6 - 17.3 Water 1.63 - 1.70 m3 € 1-2 € 1.60 - 3.40 1.1 - 0.7 Treatment chemicals € 12.0 - 4.0 8.5 - 0.8 Steam 0.06 - 1.65 ton € 10–30 € 0.60 - 49.5 0.4 - 9.8 Manufacturing costs € 30.0 - 70.0 21.3 - 13.9 Total € 141 - 505 The table clearly shows the large variations in local costs. For example, European electricity prices can range from € 34 all the way up to € 86 per MWh for extra- large electricity consumers. This can be shown in 2016 information from the International Energy Agency. The cost of salt depends on its type (quality) and source (brine/evaporated salt, rock salt/sea salt) and the distance it has to be transported. The puri- ty of the salt, typically varying between 95% and 99.9%, also influences the amount of other treat- ment chemicals that are needed to achieve the required brine quality level. Whilst lower purity salt may be cheaper, it will require more treat- ment chemicals. This is why, in the table above, lower salt prices are linked to higher treatment chemical costs and vice-versa. The relative costs of salt, water, treat- ment chemicals and steam prices per unit are tak- en from benchmark studies by Townsend. Overview of the costs in the membrane process. Unit cost is the cost of each MWh/tonne or m3 of each key component Finally, there are additional manufacturing costs to be taken into account. These cover maintenance, operation, personnel, machinery updates, etc. The previously mentioned studies estimate these manu- facturing costs at being between € 30 and € 70 per ton Cl2. Overall, the cost range, per tonne Cl2, varies be- tween € 141 and € 505 with the associated electric- ity costs ranging between € 72 and € 291. Conclusion: The cost of electricity accounts for 51-58 % of the total chlor-alkali production cost. Much more about chlorine at www.eurochlor.org Chlorine chemistry applications: www.chlorinethings.eu Euro Chlor Communications Rue Belliard 40 (box 15) B—1040 Brussels Tel. +32.2.436.9502 eurochlor@cefic.be A Sector Group of

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