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Experimental evaluation of the efficiency performance of the DMFC
Author(s) -
Bayramoğlu Mahmut,
Ciğeroğlu Zeynep,
Kazan Emine Sena
Publication year - 2020
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13454
Subject(s) - faraday efficiency , methanol , anode , direct methanol fuel cell , analytical chemistry (journal) , chemistry , polarization (electrochemistry) , materials science , kinetics , process engineering , chemical engineering , chromatography , electrode , organic chemistry , physics , engineering , quantum mechanics
This study represents the experimental assessment of the faradaic, fuel, and energetic efficiency of active direct methanol fuel cell (DMFC). The experimental system was equipped with several sensors, HPLC and UV spectroscopy to make on‐line and off‐line measurements of different components. A polarization study was conducted and an experimental plan was applied to collect the process data during 3‐hour runs. Finally, stoichiometric and various efficiency calculations were performed based on the system and the process data. The results showed that the cell performance was better at higher operating temperatures (70.8 mW cm −2 @75°C). Faradaic efficiency and fuel efficiency were better at low temperatures and estimated as 55.8% and 59.6% at 55°C, respectively. Energetic efficiency was better at higher temperatures due to the faster anode kinetics and was found as 12.3% at 75°C. The efficiencies were strongly dependent on methanol concentration. Methanol crossover was increased with increasing methanol concentration; hence the efficiencies were decreased.