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https://hdl.handle.net/123456789/1899| Τύπος: | Άρθρο σε επιστημονικό περιοδικό |
| Τίτλος: | Effect of applied potential on the performance of an electroactive methanogenic biocathode used for bioelectrochemical CO2 reduction to CH4 |
| Συγγραφέας: | [EL] Βασιλειάδου, Ιωάννα[EN] Vasiliadou, Ioanna [EL] Καλογιάννης, Αχιλλέας[EN] Kalogiannis, Achilleas [EL] Σπυριδωνίδης, Απόστολος[EN] Spyridonidis, Apostolos [EL] Κατσαούνης, Αλέξανδρος[EN] Katsaounis, Alexandros [EL] Σταματελάτου, Αικατερίνη[EN] Stamatelatou, Katerina |
| Ημερομηνία: | 03/11/2021 |
| Περίληψη: | BACKGROUND: Biogas can be upgraded towards biomethane, which can be used as vehicle fuel and natural gas substitute. Bio-electrochemical biogas upgrade is an innovative alternative to energyconsuming physicochemical processes and bio-upgrade methods which require H2 supply. Bioelectrochemical biogas upgrade is conducted by methanogenic microorganisms that convert CO2 into CH4, in the biocathode of a bioelectrochemical system (BES), using electric current as energy source. The aim of the present work was to study the efficiency of an H-type BES to convert CO2 into CH4, by applying different potentials at the electro-methanogenic biocathode. RESULTS: The H-BES was operated in a three-electrode configuration (working:graphite rod, counter:Pt/Ti, reference:Ag/AgCl) with a potentiostat, which set the biocathode’s potential initially at -0.7 V versus a standard hydrogen electrode (vs. SHE) and monitored the current demand. Based on cyclic voltammetry runs, a highly electroactive methanogenic biocathode was developed in a short-time. The methane production rate (MPR) at a cathode potential of -0.7 V vs. SHE was 31.1 mmol m-2d-1, with an electron capture efficiency of 77.6%. The BES’s efficiency was reduced by applying a potential of -0.5 V vs. SHE at the biocathode, resulting in negligibly CH4 production. The BES achieved its maximum performance at a potential of -0.9 V vs. SHE with a MPR of 53.8 mmol m-2d-1 and an electron capture efficiency of 86%. The CO2 consumption rate achieved was 0.8 mmol d-1. CONCLUSION: The H-BES achieved an effective biolectrochemically-driven methane production, while biocathode’s electroactive behavior was evaluated during the whole operation of the system. |
| Γλώσσα: | Αγγλικά |
| Σελίδες: | 10 |
| DOI: | 10.1002/jctb.6946 |
| ISSN: | 1097-4660 |
| Θεματική κατηγορία: | [EL] Ανανεώσιμη ενέργεια, Αειφορία και Περιβάλλον[EN] Renewable Energy, Sustainability and the Environment |
| Λέξεις-κλειδιά: | biogas upgrade; biomethane; bioelectrochemical |
| Κάτοχος πνευματικών δικαιωμάτων: | John Wiley & Sons, Inc. |
| Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη: | https://scijournals.onlinelibrary.wiley.com/doi/full/10.1002/jctb.6946 |
| Ηλεκτρονική διεύθυνση περιοδικού: | https://onlinelibrary.wiley.com/journal/10974660 |
| Τίτλος πηγής δημοσίευσης: | Journal of Chemical Technology & Biotechnology (JCTB) |
| Τεύχος: | 3 |
| Τόμος: | 97 |
| Σελίδες τεκμηρίου (στην πηγή): | 643-652 |
| Σημειώσεις: | This research is co-financed by Greece and the European Union (European Social Fund – ESF) through the Operational Programme ‘Human Resources Development, Education and Lifelong Learning 2014-2020’ in the context of the project ‘Bioelectrochemical biogas upgrade into methane (CH4): an innovative method of carbon dioxide (CO2) conversion’ (MIS 5050548). |
| Εμφανίζεται στις συλλογές: | Ερευνητικές ομάδες |
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