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15/16 Semester genap Teknik Elektrokimia Instructor: Rama Oktavian Email: [email protected] Office Hr.: T. 11-12, Th. 08-10; 13-15, F. 08-10; 13-15 Teknik elektrokimia Chlor-alkali plant Products: - Chlorine - Sodium hydroxide (NaOH) - Hydrogen Teknik elektrokimia Chlor-alkali plant Teknik elektrokimia Chlor-alkali plant Teknik elektrokimia Chlor-alkali plant Chlorine: - Chloride is a powerful oxidizing agent with a standard electrode potential of +1.36V. - Chlorine gas is formed during the electrolysis of molten sodium chloride in the industrial production of sodium metal. - Chlorine is produced by passing an electric current through a solution of brine (common salt dissolved in water). The chemical term for salt is sodium chloride (NaCl). - Essential co-products are caustic soda (sodium hydroxide (NaOH)) and hydrogen (H2). All three are highly reactive, and technologies have been developed to separate them and keep them apart Teknik elektrokimia Chlor-alkali plant Co-product: Caustic soda and hydrogen - Caustic soda is an alkali and widely-used in many industries, including the food industry, textile production, soap and other cleaning agents, water treatment and effluent control. - Hydrogen is a combustible gas used in various processes including the production of hydrogen peroxide and ammonia as well as the removal of sulphur fro petroleum derivatives. Teknik elektrokimia Chlor-alkali plant Teknik elektrokimia Chlor-alkali plant Chlorine: There are three methods to produce Chlorine: - The membrane cell process - The diaphragm cell process - The mercury cell process Teknik elektrokimia Chlor-alkali plant The chlor-alkali process electrolyzes NaCl(aq) to produce Cl2 (and other important chemicals) • Asbestos Diaphragm • Mercury-Cell • Membrane-Cell Electrolysis Plant http://www.bayertechnology.com/uploads/pics/chlorine_electrolysis_references_01.jpg Teknik elektrokimia Teknik elektrokimia Chlor-alkali plant The diaphragm cell Teknik elektrokimia Chlor-alkali plant The diaphragm cell Reaction: Anode: Cathode: Teknik elektrokimia Chlor-alkali plant The diaphragm cell Teknik elektrokimia Chlor-alkali plant The mercury cell Teknik elektrokimia Chlor-alkali plant The mercury cell Teknik elektrokimia Chlor-alkali plant The membrane cell Teknik elektrokimia Chlor-alkali plant The diaphragm cell Teknik elektrokimia Chlor-alkali plant Teknik Elektrokimia Chlor-alkali plant Hydrogen Handling NaOH Chlorine Drying Salt To Hypo Primary Treatment HCl Product HCl Storage Sulphuric Acid Carbon Dioxide Brine Demin. WaterSaturation HCl Production Secondary Treatment Chlorine Chlorine Compression Liquefaction Chlorine Storage Chlorine Packing, Filling Vaporization Chlorine Product Sulphuric Acid Hypo Production Hypo Storage Hypo Product Sodium Sulphite Sulphate Removal HCl NaOH Brine Dechlorination Electrolysis Caustic Concentration Chlorate Destruction Demineralized Water AC Power Supply DC Rectification HCl Hypo Destruction Caustic Storage Caustic Product Teknik Elektrokimia Chlor-alkali plant Teknik Elektrokimia Chlor-alkali plant
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