Production of fuel-cell grade hydrogen by thermal swing sorption enhanced reaction concept

Ki Bong Lee, Michael G. Beaver, Hugo S. Caram, Shivaji Sircar

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The performance of a novel thermal swing sorption enhanced reaction (TSSER) concept for production of fuel-cell grade hydrogen (< 20 ppm CO) by low temperature (∼ 490 {ring operator} C) catalytic steam-methane reforming (SMR) is simulated. The process simultaneously carries out the SMR reaction and removal of CO2 from the reaction zone by chemisorption on K2 CO3 promoted hydrotalcite in a single unit. The chemisorbent is periodically regenerated by steam purge at ∼ 590 {ring operator} C. The concept efficiently utilizes the CO2 sorption capacity of the chemisorbent and requires a relatively low amount of steam for its regeneration. A compact, small foot-print H2 generator can be designed for a residential or industrial hydrogen fuel-cell unit by the concept. Recently measured equilibrium isotherms and column dynamics for ad(de)sorption of CO2 on the chemisorbent are reviewed and parametric evaluations of design variables like catalyst:sorbent ratio and feed gas conditions (pressure, temperature, and H2 O : CH4 ratio) are carried out.

Original languageEnglish
Pages (from-to)781-790
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume33
Issue number2
DOIs
Publication statusPublished - 2008 Jan 1
Externally publishedYes

Keywords

  • Chemisorption
  • Equilibrium model
  • Fuel-cell grade
  • Hydrogen
  • Promoted hydrotalcite
  • Sorption enhanced reaction
  • Thermal swing sorption

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment

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