کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6528875 | 1419838 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Upscaling and continuous operation of electrochemical CO2 to CO conversion in aqueous solutions on silver gas diffusion electrodes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
For the upscaling of the electrochemical conversion of CO2 to CO using Ag catalyst in water, gas diffusion electrodes (GDE) are needed for a sufficient supply of CO2 to obtain currents in the 100â¯mAâ¯cmâ2 range. The effects of an upscale of one order of magnitude starting with 10â¯cm2 GDE size are presented. The penetration of electrolyte through the GDE needs to be regulated to balance the positive effects (avoid salt deposition) and the detrimental impacts (access blocking of CO2 to the GDE). Using a control of the partial pressure at the GDE to monitor the electrolyte penetration and enhancing CO2 feed by recirculation and turbulence promoters at the larger GDE. The first step of scale-up could be achieved without loss in performance. With three-compartment cells and 0.4â¯M K2SO4 electrolytes, the process is run at a current density of 150â¯mAâ¯cmâ2 over a couple of hundred hours with a Faradaic efficiency for CO (FECO) of approximately 60% on 100â¯cm2 electrode area. It is discussed how to improve the performance by a management of the perspiration rate through the GDE to lay the scientific foundations for an industrial use of this technology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 24, March 2018, Pages 454-462
Journal: Journal of CO2 Utilization - Volume 24, March 2018, Pages 454-462
نویسندگان
Philippe Jeanty, Christian Scherer, Erhard Magori, Kerstin Wiesner-Fleischer, Olaf Hinrichsen, Maximilian Fleischer,