Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7706079 | International Journal of Hydrogen Energy | 2018 | 7 Pages |
Abstract
In this study, a high temperature electrolyser for the gas phase electrolysis of hydrogen chloride for hydrogen production is proposed and assessed. A detailed electrochemical model is developed to study the J-E characteristics for the proposed electrolyser (a solid oxide electrolyser based on a proton conducting electrolyte). The developed model accounts for all major losses, namely activation, concentration and ohmic. Energy and exergy analyses are carried out, and the energy and exergy efficiencies of the proposed electrolyser are determined to be 41.1% and 39.0%, respectively. The simulation results show that at TÂ =Â 1073Â K, PÂ =Â 100.325Â kPa and JÂ =Â 1000 A/m2, 1.6Â V is required to produce 1Â mol of hydrogen. This is approximately 0.3Â V less than the voltage required by a high temperature steam electrolyser (based on a proton conducting electrolyte) operating at same condition (TÂ =Â 1073Â K, PÂ =Â 101.325Â kPa and JÂ =Â 1000 A/m2), suggesting that the proposed electrolyser offers a new option for high temperature electrolysis for hydrogen production, potentially with a low electrical energy requirement. The proposed electrolyser may be incorporated into thermochemical cycles for hydrogen production, like CuCl or chlorine cycles.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Farrukh Khalid, Ibrahim Dincer, Marc A. Rosen,