A new semiempirical model for the heat and mass transfer inside a spherical catalyst in a stream of hot CH₄/H₂O gases

TY - JOUR

T1 - A new semiempirical model for the heat and mass transfer inside a spherical catalyst in a stream of hot CH4/H2O gases

AU - Lu, Yi Ran

AU - Pashchenko, Dmitry

AU - Nikrityuk, Petr A.

N1 - Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/7/20

Y1 - 2021/7/20

N2 - This work is devoted to the development and validation of a new 0-D model (sub-model) for the steam reforming of methane inside a spherical catalyst particle (Ni/α-Al2O3) placed in a hot methane/steam atmosphere. The particle diameter is 4 mm. The submodel includes six gaseous chemical species (CH4, CO2, CO, H2O, H2, N2) and uses experimentally defined reaction rate expressions taken from the literature. The distinguishing feature of the subgrid model is its ability to take into account the internal heat and mass transfer coupled with the heat and mass transfer on the catalyst surface influenced by convection and diffusion around the particle. The sub-model was validated against a comprehensive 3D-CFD-based model resolving the issues of bulk flow, thermal and species boundary layers around the particle and convection and diffusion processes inside the porous catalyst particle. Good agreement was achieved between the new 0-D model and the 3D CFD-based model.

AB - This work is devoted to the development and validation of a new 0-D model (sub-model) for the steam reforming of methane inside a spherical catalyst particle (Ni/α-Al2O3) placed in a hot methane/steam atmosphere. The particle diameter is 4 mm. The submodel includes six gaseous chemical species (CH4, CO2, CO, H2O, H2, N2) and uses experimentally defined reaction rate expressions taken from the literature. The distinguishing feature of the subgrid model is its ability to take into account the internal heat and mass transfer coupled with the heat and mass transfer on the catalyst surface influenced by convection and diffusion around the particle. The sub-model was validated against a comprehensive 3D-CFD-based model resolving the issues of bulk flow, thermal and species boundary layers around the particle and convection and diffusion processes inside the porous catalyst particle. Good agreement was achieved between the new 0-D model and the 3D CFD-based model.

KW - Catalyst

KW - Hydrogen

KW - Methane

KW - Reforming

UR - http://www.scopus.com/inward/record.url?scp=85103390812&partnerID=8YFLogxK

U2 - 10.1016/j.ces.2021.116565

DO - 10.1016/j.ces.2021.116565

M3 - 文章

AN - SCOPUS:85103390812

SN - 0009-2509

VL - 238

JO - Chemical Engineering Science

JF - Chemical Engineering Science

M1 - 116565

ER -