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Continuous hydrogen production by sorption enhanced steam methane reforming (SE-SMR) in a circulating fluidized bed reactor: Sorbent to catalyst ratio dependencies

Continuous hydrogen production by sorption enhanced steam methane reforming (SE-SMR) in a circulating fluidized bed reactor: Sorbent to catalyst ratio dependencies

Category
Academic article
Abstract
Continuous hydrogen production by sorption enhanced steam methane reforming (SE-SMR) has been studied using a circulating fluidized bed reactor with calcined natural dolomite as CO2 sorbent and Ni/NiAl2O4 as catalyst. A steam to methane ratio of 4 was used at 575 °C and ambient pressure. Two experiments, each run for 8 h, were carried out using two different volumetric catalyst to sorbent ratios; 20/80 (experiment A) and 50/50 (experiment B) respectively. In experiment A, run at lower than equilibrium conversion, an initial high conversion that dropped significantly after a few hours was observed, while in experiment B, a stable performance throughout the 8 h time-on-stream close to equilibrium conversion of methane was observed. The experiments show that a circulating fluidized bed reactor configuration is suited for SE-SMR for extended time of operation. The sorbent and catalyst materials we have used appear to have quite good mechanical properties at the time scale used (8 h), but only a fraction of the sorbent's CO2 capacity appears to be in use.
Client
  • Research Council of Norway (RCN) / 193816
Language
English
Affiliation
  • SINTEF Industry / Process Technology
Year
2012
Published in
Chemical Engineering Journal
ISSN
1385-8947
Publisher
Elsevier
Volume
189-190
Page(s)
413 - 421