Iodide mediated electrolysis of acidic coke/coal suspension |
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Authors: | A. Demoz C. Khulbe C. Fairbridge S. Petrovic |
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Affiliation: | (1) CANMET, CETC-Devon, 1 Oil Patch Drive, Devon, AB, Canada, T9G 1A8;(2) Arizona State University, Polytechnic Campus, 7001 E. Williams Field Rd, Mesa, AZ 85212, USA |
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Abstract: | Hydrogen is among the emerging energy vectors that are being developed to replace nonrenewable hydrocarbon energy sources. The preferred method to produce hydrogen without generating greenhouse gases is the electrolysis of water using renewable energy. The reduction of energy during the water electrolysis process is a desirable goal regardless of the source of electric power. Similar to ferrous/ferric mediation, iodide can be used as a mediator in the electrolysis of an acidic suspension of coke or coal. The iodide ion is oxidized at a far lower anodic potential than the alternative oxygen evolution reaction. This reduces the cell electrolysis voltage and, consequently, reduces electricity use. The iodide consumed at the anode is continuously regenerated by chemical reaction with the coke/coal in suspension. |
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Keywords: | Catalytic chemical regeneration Electrochemical gasification Iodide mediator Iodide/triiodide redox couple Diffusion limiting current Water electrolysis |
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