CPOX reactor modeling
Modeling of a fixed bed (Catalytic Partial Oxidation) reactor (DUO)
Modeling of a fixed-bed catalytic tube reactor with 86 particles for catalytic partial oxidation (CPOX) process with the code DUO=OpenFOAM+DETCHEM. The small tube-to-particle diameter ratio of 2 requires the use of 3D Particle-Resolved Computational Fluid Dynamics (PRCFD) models to capture the salient physics, including heat and mass transfer effects. The plot shows on left side a slice and isosurfaces of methane concentration. On the right side some streaklines and the reaction rate of methane on the surface of the particles. Flow is from top to bottom.
The effect of Cell Agglomeration (CA) technique on calculation speed and accuracy was investigated. Speedup factor was between 7 for catalytic partial oxidation (CPOX) and 35 for dry reforming of methane (DRM).
Picture shows CPOX case:
a.) conversion rate of methane (reference case),
b.) conversion rate of methane (CA case),
c.) local calculation error,
d.) bin interval for rate of methane using 5 bins.
Temperature field of the fluid part and the two solid bodies (only the second one is coated).
Fluid part and solid regions are solved with OpenFOAM® whereas the detailed surface reaction is
calculated by DETCHEM. Additionally, some streaklines are plotted. The slice at the end
calculation domain shows the distribution of the velocity into z-direction.