PDF Publication Title:
Text from PDF Page: 018
18 Xiao Y. Yan and Derek J. Fray chlorine gas evolution and to offer capital savings of the process [34]. Illustrated in figure 7 is the schematic of the magnesium electrowinning cell used in their work, where the anode consisted of a graphite rod of 25 % porosity, drilled out concentrically to direct the gases to the salt/anode interface. A variety of gas spargers attached to the bottom end of the graphite rod were tested. The cathode was either carbon or steel rod. The electrowinning experiments were conducted at 680-750 °C using a molten chloride electrolyte composed of 20.5 %MgCl2, 39 %NaCl, 39 %CaCl2, and 1.5 %KCl (in wt%). When hydrogen gas was introduced to the anode compartment, anodic and cathodic reactions and an overall cell reaction are given respectively by 2Cl- + H2(g) = 2HCl(g) + 2e (11) Mg2+ + 2e = Mg (12) MgCl2 + H2(g) = Mg + 2HCl(g) (13) The reversible cell voltage needed for Reaction 13 is 1.46 V at 727 °C as opposed to 2.50 V for Reaction 9. They found that the addition of hydrogen gas to the anode compartment decrease the anode depolarization and cell voltage and an increase in electrolysis temperature allowed further decrease in anode voltage. It was demonstrated that pure hydrogen gas added to the anode compartment lowered the anode voltage by about 1 V, confirming the concept proposed. Figure 7. Magnesium electrowinning cell with HCl generation at the anode [34].PDF Image | MOLTEN SALT ELECTROLYSIS
PDF Search Title:
MOLTEN SALT ELECTROLYSISOriginal File Name Searched:
Molten-Salt-Electrolysis-Chapter-6.pdfDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Power up your energy storage game with Salgenx Salt Water Battery. With its advanced technology, the flow battery provides reliable, scalable, and sustainable energy storage for utility-scale projects. Upgrade to a Salgenx flow battery today and take control of your energy future.
CONTACT TEL: 608-238-6001 Email: greg@salgenx.com (Standard Web Page)