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Title: Analysis of fixed bed data for the extraction of a rate mechanism for the reaction of hematite with methane

In this study, chemical looping combustion is a promising technology for the capture of CO2 involving redox materials as oxygen carriers. The effects of reduction conditions, namely, temperature and fuel partial pressure on the conversion products are investigated. The experiments were conducted in a laboratory fixed-bed reactor that was operated cyclically with alternating reduction and oxidation periods. Reactions are assumed to occur in the shell surrounding the particle grains with diffusion of oxygen to the surface from the grain core. Activation energies for the shell and core reactions range from 9 to 209 kJ/mol depending on the reaction step.
Authors:
 [1] ;  [2]
  1. National Energy Technology Lab. (NETL), Morgantown, WV (United States)
  2. National Energy Technology Lab. (NETL), Morgantown, WV (United States); REM Engineering Services, PLLC, Morgantown, WV (United States)
Publication Date:
OSTI Identifier:
1240123
Report Number(s):
NETL-PUB--1138
Journal ID: ISSN 1226-086X; PII: S1226086X15000969
Type:
Accepted Manuscript
Journal Name:
Journal of Industrial and Engineering Chemistry
Additional Journal Information:
Journal Volume: 29; Journal Issue: C; Journal ID: ISSN 1226-086X
Publisher:
Elsevier
Research Org:
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY chemical looping combustion; hematite reduction; kinetic rates