Modeling and Testing of a Milli-Structured Reactor for Carbon Dioxide Methanation
-
S. Pérez
,
E. Del Molino
Abstract
The methanation of carbon dioxide (CO2) via the Sabatier reaction is an exothermic process that needs the continuous removal of the heat produced for avoiding the sintering of the catalyst. A novel milli-channel reactor with internal diameter of each channel in the millimeter size has been designed, manufactured and tested for the Sabatier reaction. Thanks to its configuration, this reactor could control effectively the heat generated by the reaction, attaining an intensification of the process. A CFD model was used to study the reaction phenomena occurring inside the reactor and the corresponding heat transfers. The kinetic parameters of the reaction have been obtained, and employing different process condition (different temperatures, pressures and gas flow rates) the results obtained have been studied. At the evaluated parameters, the CFD model fits the experimental results in the developed reactor.
Nomenclature
- A
pre-exponential factor of the Arrhenius form, s−1
- Cp
specific heat capacity of fluid, J.kg−1. K−1
effective thermal diffusion in porous media, m2.s−1
fluid averaged diffusion coefficient, m2.s−1
- Ea
activation energy, J.mol−1
- F
volume force
- H
enthalpy of reaction, J.mol−1
- keff
effective thermal conductivity, W.m−1. K−1
- Keq
reaction equilibrium constant
- kf
forward rate constant, s−1
- kr
reverse rate constant, s−1
- Mn
mean molar mass, kg.mol−1
- n
empirical factor for the global Sabatier reaction
- p
absolute pressure, Pa
- Q
heat source, W.m−3
- Qvd
viscous dissipation, W.m−3
- R
ideal gas constant, J.mol−1. K−1
- Ri
reaction rate of species i, mol.m−3.s−1
- r
reaction rate, mol.m−3.s−1
- S
entropy of reaction, J.mol−1. K−1
- T
temperature, K
- u
fluid velocity field, m.s−1
- yi
mole fraction of species i
- Greek symbols
- µ
fluid viscosity, Pa.s
- νi
stoichiometric coefficient of species i
- ρ
fluid density, kg.m−3
- ωi
mass fraction of species i
- Abbreviations
- GHSV
gas hourly space velocity, L.
Acknowledgements
This research was supported by the University of the Basque Country (UPV/EHU), Spanish Ministry of Economy and Competitiveness (ENE2017-82250-R), European Union through the European Regional Development Fund (FEDER).
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Artikel in diesem Heft
- Review
- Simulation of Particle Mixing and Separation in Multi-Component Fluidized Bed Using Eulerian-Eulerian Method: A Review
- Articles
- Acidic Functionalized Nanobohemite: An Active Catalyst for Methyl Ester Production
- Investigation on the Flow Field and Mixing Efficiency of a Stirred Tank Equipped with Improved Intermig Impellers
- Modeling and Testing of a Milli-Structured Reactor for Carbon Dioxide Methanation
- Catalytic Steam Gasification of Glucose for Hydrogen Production Using Stable Based Ni on a γ–Alumina Fluidizable Catalyst
- PIV Measurement and CFD Simulation of Liquid-Liquid Mixing in Mixer Settler with Rigid-Flexible Impeller
- Catalytic Synthesis of Monoglycerides by Glycerolysis of Triglycerides
- Exergy and Energy Analysis of Coal Gasification in Supercritical Water with External Recycle System
- CFD Study on the Flow Field and Power Characteristics in a Rushton Turbine Stirred Tank in Laminar Regime
- Numerical Simulation of Flow Distribution in the Reactor Used for CFRPs Degradation under Supercritical Condition
- Short Communication
- Rebuttal To: “On the Understanding of the Adsorption of 2-Phenylethanol on Polyurethane-Keratin Based Membranes” by Cordero-Soto et al. (Int. J. Chem. React. Eng. 2017, 15 (5), Article Number: 20170103)
