3D-printed structured catalysts for CO2 methanation reaction: Advancing of gyroid-based geometries
Artikel i vetenskaplig tidskrift, 2022
This work investigates the CO2 methanation rate of structured catalysts by tuning the geometry of 3D-printed metal Fluid Guiding Elements (FGEs) structures based on periodically variable pseudo-gyroid geometries. The enhanced performance showed by the structured catalytic systems is mostly associated with the capability of the FGEs substrate geometries for efficient heat usages. Thus, variations on the channels diameter resulted in ca. 25% greater CO2 conversions values at intermediate temperature ranges. The highest void fraction evidenced in the best performing catalyst (3D-1) favored the radial heat transfer and resulted in significantly enhanced catalytic activity, achieving close to equilibrium (75%) conversions at 400 °C and 120 mL/min. For the 3D-1 catalyst, a mathematical model based on an experimental design was developed thus enabling the estimation of its behavior as a function of temperature, spatial velocity, hydrogen to carbon dioxide (H2/CO2) ratio, and inlet CO2 concentration. Its optimal operating conditions were established under 3 different scenarios: 1) no restrictions, 2) minimum H2:CO2 ratios, and 3) minimum temperatures and H2/CO2 ratio. For instance, for the lattest scenario, the best CO2 methanation conditions require operating at 431 °C, 200 mL/min, H2/CO2 = 3 M ratio, and inlet CO2 concentration = 10 %.
Fluid guiding elements
Structured catalysts
Experiment design
Triply periodic minimal surfaces
CO methanation 2
3D-printing
Författare
Miriam González-Castaño
Brandenburgische Technische Universität
Francisco Baena-Moreno
Universidad de Sevilla
Chalmers, Rymd-, geo- och miljövetenskap, Energiteknik
Brandenburgische Technische Universität
Juan Carlos Navarro de Miguel
Consejo Superior de Investigaciones Científicas (CSIC)
Kamal U.M. Miah
Brandenburgische Technische Universität
Fátima Arroyo-Torralvo
Universidad de Sevilla
Ralf Ossenbrink
Brandenburgische Technische Universität
José Antonio Odriozola
University of Surrey
Consejo Superior de Investigaciones Científicas (CSIC)
Walther Benzinger
Karlsruher Institut für Technologie (KIT)
Andreas Hensel
Karlsruher Institut für Technologie (KIT)
Achim Wenka
Karlsruher Institut für Technologie (KIT)
Harvey Arellano-García
University of Surrey
Brandenburgische Technische Universität
Energy Conversion and Management
0196-8904 (ISSN)
Vol. 258 115464Ämneskategorier (SSIF 2011)
Energiteknik
Kemiska processer
Annan kemiteknik
DOI
10.1016/j.enconman.2022.115464