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Rotating bed reactor for CLC: Bed characteristics dependencies on internal gas mixing

Abstract

A newly designed continuous lab-scale rotating bed reactor for chemical looping combustion using CuO/Al2O3 oxygen carrier spheres and methane as fuel gives around 90% CH4 conversion and >90% CO2 capture efficiency based on converted methane at 800C. However, from a series of experiments using a broad
range of operating conditions potential CO2 purities only in the range 20–65% were yielded, mostly
due to nitrogen slip from the air side of the reactor into the effluent CO2 stream. A mathematical model
was developed intending to understand the air-mixing phenomena. The model clearly reflects the gas
slippage tendencies observed when varying the process conditions such as rotation frequency, gas flow
and the flow if inert gas in the two sectors dividing the air and fuel side of the reactor. Based on the
results, it is believed that significant improvements can be made to reduce gas mixing in future modified
and scaled-up reactor versions.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 193816
  • Research Council of Norway (RCN) / 189984

Language

English

Author(s)

Affiliation

  • SINTEF Industry / Process Technology

Year

2014

Published in

Applied Energy

ISSN

0306-2619

Publisher

Elsevier

Volume

113

Page(s)

1952 - 1957

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