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Dynamic heat and mass transfer modeling and control in carbon dioxide reactive absorption process

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Abstract

A dynamic model has been developed for modeling of carbon dioxide reactive absorption. Mass transfers of the species were considered in both directions. The heat and mass transfer differential equations, were solved using the method of lines. The experiments were carried out to evaluate the model perditions, using an absorption pilot plant. A comparison between the experimental data and the simulation results proves the good predictivity of the presented model.

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Abbreviations

a :

Specific packing surface (m2/m3)

A :

Cross-sectional area (m2)

C :

Molar concentration (mol/m3)

C p :

Heat capacity (j/m3.k)

CR :

Carbonation ratio (–)

E :

Specific energy holdup (J/m)

D :

Diffusion coefficient (m2/s)

G :

Gas phase molar flow rate (mol/s)

h :

Molar enthalpy (J/mol)

Δ H :

Heat of reaction (J/mol)

K :

Vapor–liquid equilibrium constant (–)

k :

Reaction rate constant (lit/mol.s)

k L :

Mass transfer coefficient (m/s)

L :

Liquid phase molar flow rate (mol/s)

M :

Film conversion parameter (–)

N :

Interfacial molar flux (mol/m2.s)

q :

Heat flux (J/m2.s)

R :

Reaction rate (mol/m3.s)

T :

Temperature (K)

x :

Liquid phase mole fraction (–)

y :

Gas phase mole fraction (–)

Z :

Axial co-ordinate (m)

δ :

Film thickness (m)

ϕ :

Specific molar holdup (mol/m)

φ :

Volumetric holdup (m3/m3)

λ :

Thermal conductivity (W/m.K)

G :

Gas phase

L :

Liquid phase

i :

Component index

j :

Segment index

s :

Component index

b :

Bulk

f :

Film

g :

Gas

l :

Liquid

I :

Interface

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Authors and Affiliations

  1. School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Narmak, Tehran, Iran

    Hadi Niknafs, Ahad Ghaemi & Shahrokh Shahhosseini

Authors
  1. Hadi Niknafs
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  2. Ahad Ghaemi
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  3. Shahrokh Shahhosseini
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Correspondence to Ahad Ghaemi.

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Niknafs, H., Ghaemi, A. & Shahhosseini, S. Dynamic heat and mass transfer modeling and control in carbon dioxide reactive absorption process. Heat Mass Transfer 51, 1131–1140 (2015). https://doi.org/10.1007/s00231-014-1484-0

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  • DOI: https://doi.org/10.1007/s00231-014-1484-0

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