کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7709166 1497327 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical characterization and mechanism analysis of high temperature Co-electrolysis of CO2 and H2O in a solid oxide electrolysis cell
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Electrochemical characterization and mechanism analysis of high temperature Co-electrolysis of CO2 and H2O in a solid oxide electrolysis cell
چکیده انگلیسی
Flexible nuclear power for synthetic fuel production through high temperature co-electrolysis technology (HTCE) using solid oxide electrolysis cell (SOEC) has recently received increasing international interest in the large-scale, highly efficient and carbon-neutral energy storage field. It is of great importance to enhancing the understanding of co-electrolysis process and the related mechanism. In this paper, CO2 behavior and its effect on the performance of SOEC were examined by the electrochemical characterization and impedance analysis to determine the proper operating conditions, such as H2O, CO2, H2, CO, operation temperature and electrolysis current. The polarization mechanism is also investigated by the experimental and modeling results. It was found that the electrolysis of CO2 is much harder than that of H2O, and the ASR of pure CO2 electrolysis is about three times that of H2O. When the CO2 content decreases from 50% to 10%, the ASR decreases from 1.59 to 0.90 Ω cm2. Increasing the H2O content could also improve the electrolysis efficiency to some degree, while the CO addition in the inlet gas was not favorable for the process. Mechanism study shows that the diffusion impedance of CO2 should be the restricted step for the polarization energy loss.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 50, 14 December 2017, Pages 29911-29920
نویسندگان
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