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Title: | Continuous-Flow Sunlight-Powered CO2 Methanation Catalyzed by γ-Al2O3-Supported Plasmonic Ru Nanorods | Authors: | Rohlfs, Jelle Bossers, Koen W. Meulendijks, Nicole Valega Mackenzie, Fidel Xu, Man Verheijen, Marcel A. BUSKENS, Pascal Sastre, Francesc |
Issue Date: | 2022 | Publisher: | MDPI | Source: | Catalysts, 12 (2) (Art N° 126) | Abstract: | Plasmonic CO2 methanation using gamma-Al2O3-supported Ru nanorods was carried out under continuous-flow conditions without conventional heating, using mildly concentrated sunlight as the sole and sustainable energy source (AM 1.5, irradiance 5.5-14.4 kW & BULL;m(-2) = 5.5-14.4 suns). Under 12.5 suns, a CO2 conversion exceeding 97% was achieved with complete selectivity towards CH4 and a stable production rate (261.9 mmol & BULL;gRu-1 & BULL;h(-1)) for at least 12 h. The CH4 production rate showed an exponential increase with increasing light intensity, suggesting that the process was mainly promoted by photothermal heating. This was confirmed by the apparent activation energy of 64.3 kJ & BULL;mol(-1), which is very similar to the activation energy obtained for reference experiments in dark (67.3 kJ & BULL;mol(-1)). The flow rate influence was studied under 14.4 suns, achieving a CH4 production plateau of 264 mu mol min(-1) (792 mmol & BULL;gRu-1 & BULL;h(-1)) with a constant catalyst bed temperature of approximately 204 & DEG;C. | Notes: | Buskens, P; Sastre, F (corresponding author), Netherlands Org Appl Sci Res TNO, High Tech Campus 25, NL-5656 AE Eindhoven, Netherlands.; Buskens, P (corresponding author), Hasselt Univ, Inst Mat Res Design & Synth Inorgan Mat DESINe, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium. jelle.rohlfs@tno.nl; koen.bossers@tno.nl; nicole.meulendijks@tno.nl; fidel.valegamackenzie@tno.nl; man.xu@tno.nl; MarcelVerheijen@eurofinsEAG.com; pascal.buskens@tno.nl; francesc.sastrecalabuig@tno.nl |
Keywords: | carbon dioxide;Sabatier reaction;solar light;surface plasmon resonance;photochemistry | Document URI: | http://hdl.handle.net/1942/36951 | e-ISSN: | 2073-4344 | DOI: | 10.3390/catal12020126 | ISI #: | WOS:000764430200001 | Rights: | 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2023 |
Appears in Collections: | Research publications |
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