Tutorial Modeling of monolith reactors

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Model complexity: Points to note • How much complexity is wanted and or needed? – At what level do you wish to model? – How much information do you want to include? – Do you need to include all of the scales? • The model should be as simple as possible, but not simpler (Albert Einstein). • Models do not have to be perfect to be useful. Gas Phase Catalyst 8
Mathematical formulation • The fundamental model is represented by a set of equations, which include key assumptions – Algebraic equations, linear or non-linear – Ordinary differential equations (IVP or BVP) – Partial differential equations • Practical monolith modelling problems do not have analytical solutions; models are solved numerically. • The model selected and the way it is represented will determine the numerical method used for its solution. 9
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: Model Scales Micro scale: At the at
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 and 58: Energy balances The fluid phase ene
Page 59 and 60:
Continuum model • In effect, the
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
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Tutorial Modeling of monolith reactors

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