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Kinetics Analysis of Steam Reforming of Methane on Sponge Iron

Abstract

The kinetics of steam reforming of methane catalyzed by sponge iron was studied at temperatures between 875°C and 1050°C. Results shows that sponge iron acts as a catalyst and methane conversion is increased in higher temperatures and with a higher H2/H2O ratio in the inlet gas. A kinetic model based on chemical reaction control fits well the experimental data up to methane conversion of 0.5 with an apparent activation energy of 258 kJ/mol. Pore diffusion limits the reaction rate more intensely at higher conversions of methane, higher temperatures, and larger particle size (from 9 to 17 mm). Two types of industrial pellets were compared showing that microstructural properties such as porosity, pore size, and grain size impact reduction rate with hydrogen and the catalytic property of the obtained sponge iron.
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Category

Academic article

Language

English

Author(s)

  • Tiago Ramos Ribeiro
  • João Batista Ferreira Neto
  • João Guilherme Rocha Poço
  • Cyro Takano
  • Leiv Kolbeinsen
  • Eli Ringdalen

Affiliation

  • SINTEF Industry / Metal Production and Processing
  • Norwegian University of Science and Technology
  • Brazil
  • University of São Paulo

Year

2022

Published in

ISIJ International

ISSN

0915-1559

Volume

62

Issue

3

Page(s)

504 - 514

View this publication at Norwegian Research Information Repository