Novel thermal-swing sorption-enhanced reaction process concept for hydrogen production by low-atemperature steam-methane reforming

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

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Hydrogen production by steam reforming of natural gas is a well-established technology. The possibility of using hydrogen, a nonpolluting fuel, in fuel cells has brought new interest in developing small, efficient, fuel-cell grade hydrogen production units for residential or industrial use. A novel, step-out, low-temperature, steam-methane reforming (SMR) process concept called "thermal-swing sorption-enhanced reaction" (TSSER) is described. The concept simultaneously carries out the SMR reactions at 490-590 °C and removes the byproduct CO 2 from the reaction zone in a single unit operation, thereby (a) circumventing the thermodynamic limitations of the SMR reactions and (b) directly producing a fuel-cell grade H 2 product with very high CH 4-to-H 2 conversion. A K 2CO 3 promoted hydrotalcite is used as the CO 2 selective chemisorbent in the reactor, which is periodically regenerated by steam purge at 590 °C. Model simulations of the TSSER process using recently measured CO 2 chemisorption characteristics of the promoted hydrotalcite indicate that a very compact H 2 generation unit can be designed that requires relatively low amounts of steam for regeneration. New CO 2 desorption data from the chemisorbent and its thermal stability are reported.

Original languageEnglish
Pages (from-to)5003-5014
Number of pages12
JournalIndustrial and Engineering Chemistry Research
Volume46
Issue number14
DOIs
Publication statusPublished - 2007 Jul 4
Externally publishedYes

Fingerprint

hydrotalcite
Steam reforming
Carbon Monoxide
fuel cell
Hydrogen production
Sorption
sorption
methane
hydrogen
Fuel cells
Steam
Reforming reactions
well technology
natural gas
desorption
Chemisorption
regeneration
thermodynamics
Byproducts
Hydrogen

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Novel thermal-swing sorption-enhanced reaction process concept for hydrogen production by low-atemperature steam-methane reforming. / Lee, Ki Bong; Beaver, Michael G.; Caram, Hugo S.; Sircar, Shivaji.

In: Industrial and Engineering Chemistry Research, Vol. 46, No. 14, 04.07.2007, p. 5003-5014.

Research output: Contribution to journalArticle

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