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A Kinetic Study of Ethanol Steam Reforming Using a Nickel Based Catalyst

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Abstract

A kinetic study of ethanol steam reforming to produce hydrogen within the region of kinetic rate control was carried out. A Ni(II)–Al(III) lamellar double hydroxide as catalyst precursor was used. H2, CO, CO2 and CH4 were obtained as products. Using the Langmuir–Hinshelwood (L–H) approach, two kinetic models were proposed. The first was a general model including four reactions, two of them corresponding to ethanol steam reforming and the other two to methane steam reforming. When high temperatures and/or high water/ethanol feed ratios were used, the system could be reduced to two irreversible ethanol steam reforming reactions.

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Abbreviations

Ct :

Total concentration of active sites

Ea :

Activation energy (KJ/mol)

K:

Equilibrium constant

K*:

Equilibrium constant of surface reaction

KE :

Adsorption equilibrium constant of ethanol

KM :

Adsorption equilibrium constant of methane

KW :

Adsorption equilibrium constant of water

k:

Kinetic coefficient

k*:

k/Ct

n :

Number of experiments

P:

Partial pressure

r:

Reaction rate

y:

Molar fraction

\( y_{i,s}^{\exp } \) :

Molar fraction of i measured in experiment s

\( \hat{y}_{i}^{\exp } \) :

Average of y i,s exp

y i,s :

Molar fraction of i predicted with the model

ΔH:

Adsorption enthalpy

\( \theta \) :

Space time

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Acknowledgments

To Universidad de Buenos Aires, CONICET, ANPCYT and CYTED for the financial support. The authors acknowledge the help of Mr. Roberto Tejeda in the experimental measurements.

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Authors and Affiliations

  1. Laboratorio de Procesos Catalíticos, Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Buenos Aires, Pabellón de Industrias, Ciudad Universitaria, 1428, Buenos Aires, Argentina

    V. Mas, M. L. Bergamini, G. Baronetti, N. Amadeo & M. Laborde

Authors
  1. V. Mas
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  2. M. L. Bergamini
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  3. G. Baronetti
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  4. N. Amadeo
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  5. M. Laborde
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Corresponding author

Correspondence to M. Laborde.

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Mas, V., Bergamini, M.L., Baronetti, G. et al. A Kinetic Study of Ethanol Steam Reforming Using a Nickel Based Catalyst. Top Catal 51, 39–48 (2008). https://doi.org/10.1007/s11244-008-9123-y

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