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Numerical investigation of the optimal operative conditions for the dry reforming reaction in a fixed-bed reactor: role of the carbon deposition and gasification reactions

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Abstract

The effect of the reaction parameters on the catalytic activity and the carbon deposition over 33 % Ni/Al2O3 catalyst was investigated. The kinetics of the CO2 reforming of methane was considered in the temperature range 450–650°C at atmospheric pressure with a 1:1:8 mixture of CH4, CO2 and N2. The reactor model for the dry reforming of methane used the Richardson and Paripatyadar kinetics and the Snoeck et al. kinetics for the coke deposition and the gasification reactions. The results led to the conclusion of the influence of CH4/CO2 ratio and temperature on the conversion/yield.

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Abbreviations

DRM:

Dry reforming of methane

L:

Reactor length (m)

Dt :

Reactor external diameter (m)

F:

Molar flow rate (mol s−1)

\({\text{F}}_{{ ( {\text{j)}}}}^{\text{p}}\) :

Molar flow rate of production of species i (mol s−1)

X:

Conversion (–)

P:

Pressure (atm)

T:

Temperature (K)

Tw :

Wall temperature (K)

r:

Specific rate of reaction (mol kg−1 s−1)

R:

Universal gas constant (J mol−1 K−1)

u:

Gas velocity (m s−1)

w:

Transversal reactor cross section (m2)

z:

Dimensionless length (–)

∆H:

Heat of reaction (kJ mol−1)

Cp:

Heat capacity (J kg−1 K−1)

Uw :

Global heat transfer coefficient (W m−2 K−1)

ρg :

Volumetric mass density of gas (kg m−3)

ρb :

Volumetric mass density of catalyst (kg m−3)

k:

Reaction rate constant

K:

Adsorption constant

Kp :

Equilibrium constant for reaction

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Authors and Affiliations

  1. Laboratoire de Génie des Procédés Chimiques, Université Ferhat Abbas, 19000, Sétif, Algéria

    Yacine Benguerba & Lila Dehimi

  2. IPHC, RePSeM, Université de Strasbourg, 25 rue Becquerel, 67087, Strasbourg, France

    Mirella Virginie, Christine Dumas & Barbara Ernst

  3. CNRS, UMR7178, 67087, Strasbourg, France

    Mirella Virginie, Christine Dumas & Barbara Ernst

Authors
  1. Yacine Benguerba
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  2. Lila Dehimi
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  3. Mirella Virginie
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  4. Christine Dumas
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  5. Barbara Ernst
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Correspondence to Yacine Benguerba.

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Benguerba, Y., Dehimi, L., Virginie, M. et al. Numerical investigation of the optimal operative conditions for the dry reforming reaction in a fixed-bed reactor: role of the carbon deposition and gasification reactions. Reac Kinet Mech Cat 115, 483–497 (2015). https://doi.org/10.1007/s11144-015-0849-9

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  • DOI: https://doi.org/10.1007/s11144-015-0849-9

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