Effect of catalyst activity in SMR-SERP for hydrogen production: Commercial vs. large-pore catalyst

Eduardo L.G. Oliveira, Carlos A. Grande, Alírio E. Rodrigues

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

In this work, we have evaluated the performance of an SMR-SERP unit (steam methane reforming sorption enhanced reaction process), using two different Ni/Al2O3 catalysts: commercial "Octolyst 2001" from Degussa and a large-pore catalyst (Catalyst A). The selective CO2 sorbent was a potassium modified hydrotalcites. Several experiments were performed under different operating conditions to validate a mathematical model. Experimental results show that the Degussa catalyst is more active and more selective to CO2 producing hydrogen with higher purity and less CO than the large-pore catalyst. Cyclic SMR-SERP experiments were also performed. The cycles comprise four different steps: reaction, depressurization, reactive regeneration and pressurization. In the cyclic experiments, conversion was 43% higher than in an SMR reactor, while H2 purity was 75%, which is 25% higher than in normal SMR operation. Results indicate that more active catalysts also promote a better reactive regeneration optimizing the use of part of the product (H2). The proposed mathematical model was validated in a wide range of operating conditions and in a cyclic experiment. The model was able to describe the SMR-SERP experiments without any fitting parameters. © 2010 Elsevier Ltd.
Original languageEnglish (US)
Pages (from-to)342-354
Number of pages13
JournalChemical Engineering Science
Volume66
Issue number3
DOIs
StatePublished - Feb 1 2011
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Applied Mathematics
  • Industrial and Manufacturing Engineering

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