Reaction Kinetics, Mechanisms and Catalysis

, Volume 115, Issue 2, pp 483–497 | Cite as

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

  • Yacine Benguerba
  • Lila Dehimi
  • Mirella Virginie
  • Christine Dumas
  • Barbara Ernst
Article

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.

Keywords

Dry reforming Methane Modelling Fixed-bed reactor Carbon deposition 

List of symbols

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

Supplementary material

11144_2015_849_MOESM1_ESM.docx (14.6 mb)
Supplementary material 1 (DOCX 14911 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • Yacine Benguerba
    • 1
  • Lila Dehimi
    • 1
  • Mirella Virginie
    • 2
    • 3
  • Christine Dumas
    • 2
    • 3
  • Barbara Ernst
    • 2
    • 3
  1. 1.Laboratoire de Génie des Procédés ChimiquesUniversité Ferhat AbbasSétifAlgéria
  2. 2.IPHC, RePSeMUniversité de StrasbourgStrasbourgFrance
  3. 3.CNRS, UMR7178StrasbourgFrance

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