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Reduction of iron oxides by carbon in a circulating fluidized bed reactor

Iyengar, Srinivasan LU (2002) In Powder Technology 124(April). p.28-39
Abstract
A theoretical analysis of the reduction of iron oxides by carbon in a circulating fluidized bed reactor is considered in this study. Iron oxide and coal particles are fast fluidized in the main column by a hot stream of gases (N2–CO–CO2–H2–H2O). The analysis considers kinetic and hydrodynamic factors in the reactor and assumes the reduction reaction by carbon to proceed through gaseous intermediates.

Using reported base data, the model has been used to generate the temperature and composition profiles in the charge as well as the gas phase, both in the main as well as return columns. Under these conditions, the change in oxygen content of an isolated iron oxide particle during its passage through the CFB has been computed. The... (More)
A theoretical analysis of the reduction of iron oxides by carbon in a circulating fluidized bed reactor is considered in this study. Iron oxide and coal particles are fast fluidized in the main column by a hot stream of gases (N2–CO–CO2–H2–H2O). The analysis considers kinetic and hydrodynamic factors in the reactor and assumes the reduction reaction by carbon to proceed through gaseous intermediates.

Using reported base data, the model has been used to generate the temperature and composition profiles in the charge as well as the gas phase, both in the main as well as return columns. Under these conditions, the change in oxygen content of an isolated iron oxide particle during its passage through the CFB has been computed. The results indicate that a freshly introduced oxide particle needs to circulate in the system five to six times before the reduction level approaches about 60%. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Kinetics, Modeling, Circulating fluidized bed, Reduction, Iron oxide
in
Powder Technology
volume
124
issue
April
pages
28 - 39
publisher
Elsevier
external identifiers
  • wos:000175462800004
  • scopus:0037041198
ISSN
0032-5910
DOI
10.1016/S0032-5910(01)00484-3
language
English
LU publication?
yes
id
b70e5c08-d2ff-4da7-86e2-92eaa52230be (old id 786321)
date added to LUP
2008-02-11 08:23:11
date last changed
2017-02-26 04:08:58
@article{b70e5c08-d2ff-4da7-86e2-92eaa52230be,
  abstract     = {A theoretical analysis of the reduction of iron oxides by carbon in a circulating fluidized bed reactor is considered in this study. Iron oxide and coal particles are fast fluidized in the main column by a hot stream of gases (N2–CO–CO2–H2–H2O). The analysis considers kinetic and hydrodynamic factors in the reactor and assumes the reduction reaction by carbon to proceed through gaseous intermediates.<br/><br>
Using reported base data, the model has been used to generate the temperature and composition profiles in the charge as well as the gas phase, both in the main as well as return columns. Under these conditions, the change in oxygen content of an isolated iron oxide particle during its passage through the CFB has been computed. The results indicate that a freshly introduced oxide particle needs to circulate in the system five to six times before the reduction level approaches about 60%.},
  author       = {Iyengar, Srinivasan},
  issn         = {0032-5910},
  keyword      = {Kinetics,Modeling,Circulating fluidized bed,Reduction,Iron oxide},
  language     = {eng},
  number       = {April},
  pages        = {28--39},
  publisher    = {Elsevier},
  series       = {Powder Technology},
  title        = {Reduction of iron oxides by carbon in a circulating fluidized bed reactor},
  url          = {http://dx.doi.org/10.1016/S0032-5910(01)00484-3},
  volume       = {124},
  year         = {2002},
}