Tutorial Modeling of monolith reactors

More documents

Recommendations

Info

Mass balances The fluid phase mass balance is: ( f wif , ) fv wif , ( Dim , wif , ) kmav f( wif , wiS , ) ∂ φ ρ + ρ ∇ = ∇ φρ ∇ + ρ − ∂t i i ( ) Mass diffusion occurs only in the flow direction The solid phase mass balance is: 0 = η i Ri + kmavρf wi, f − wi, S Washcoat diffusion is included via the effectiveness factor 58
Continuum model • In effect, the continuum model solves a set of 1D single channel models with channel coupling via solid phase heat transfer. • However, every channel is not modelled. • Heat and mass transfer coefficients are the same as used in the 1D SCM. • The continuum model consists of a set of coupled PDE, which are solved using the FEM or the FVM. 59
Page 1 and 2:
Introduction to Monolith Reactor Mo
Page 3 and 4:
Why use computer modelling? • Exp
Page 5 and 6:
Observations • The problem involv
Page 7 and 8: Model Scales Micro scale: At the at
Page 9 and 10: Mathematical formulation • The fu
Page 11 and 12: Basic models in common use • Sing
Page 13 and 14: The 3D SCM • The real monolith do
Page 15 and 16: The 2D approximate SCM • The 2D m
Page 17 and 18: The 2D SCM • All of the physical/
Page 19 and 20: Modelling the fluid domain Velocity
Page 21 and 22: Modelling the washcoat domain • T
Page 23 and 24: Diffusion in the washcoat • Diffu
Page 25 and 26: Modelling the substrate domain The
Page 27 and 28: Comparing 2D and 3D models • The
Page 29 and 30: Comparing 2D and 3D models • The
Page 31 and 32: Comparing 2D and 3D models Percenta
Page 33 and 34: Review of boundary layer flow Flow
Page 35 and 36: Boundary layers in a tube • At th
Page 37 and 38: Heat and mass transfer • Heat and
Page 39 and 40: 1D SCM mass balances The fluid phas
Page 41 and 42: 1D SCM energy balances The fluid ph
Page 43 and 44: Nusselt and Sherwood numbers • Fo
Page 45 and 46: Nusselt and Sherwood numbers • Ho
Page 47 and 48: Nusselt and Sherwood numbers • Ho
Page 49 and 50: Simplified 1D models • Dispersion
Page 51 and 52: Models for the converter • In rea
Page 53 and 54: Discrete converter models • A pas
Page 55 and 56: Momentum balance equation Velocity
Page 57: Energy balances The fluid phase ene
Page 61 and 62: Model validation • All models mus
Page 63 and 64: Model validation - Example Heating
Page 65: Advertising supplement R.E. Hayes a
show all

Tutorial Modeling of monolith reactors

Create successful ePaper yourself

Delete template?

Save as template?