Transcription of Hydrogen production by electrolysis - .NET Framework
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Hydrogen production by electrolysis - .NET Framework
Hydrogen production by electrolysis Ann Cornell, Department of Chemical Engineering, KTH.. Sources for Hydrogen International Energy Agency. Technology Roadmap . Hydrogen and Fuel Cells, 2015. electrolysis 4%. Coal electrolysis 18% 22%. Natural gas Natural gas 48% 37%. Coal Oil refineries 33%. 30%. Biomass 8%. Today Prediction year 2050. electrolysis for H2- production Only large scale alternative for fossil-free production Expensive method Pure gases produced Water electrolysis : Acidic conditions Alkaline conditions Anode H2O O2 + 2H+ + 2e- 2OH- O2 + 2H2O + 2e- Cathode 2H+ + 2e- H2 2H2O + 2e- H2 + 2OH- Total reaction: H2O H2 + O2. Commercial techniques water electrolysis SPE (Solid Alkaline water polymer Technology electrolysis electrolyte).
Chlor-alkali . 2Cl-+ 2H. 2. O → -Cl. 2 + H. 2 + 2OH ~60 million tonnes/year Cl. 2 . produced world wide . Many uses for the products . Chlorate . NaCl + 3H 2 O → NaClO 3 + 3H 2 . About 4 million tonnes/year NaClO 3 produced world wide . Main use in the bleaching of chemical pulp . In some plants the hydrogen formed is not used at all ...
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