Application of an electrochemical membrane reactor to the thermochemical water splitting IS process for hydrogen production

Mikihiro Nomura, Seiji Fujiwara, Kazuhiko Ikenoya, Seiji Kasahara, Hayato Nakajima, Shinji Kubo, Gab Jin Hwang, Ho Sang Choi, Kaoru Onuki

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

The Bunsen reaction (SO2 + I2 + 2H2O = H2SO4 + 2HI) in the thermochemical IS process to produce hydrogen was successfully employed using an electrochemical membrane reactor. H2SO4 and HI were concentrated in the anode side and the cathode side of the reactor, respectively. I2 is the dominant bulk of the recycling chemicals in this process, and I2 concentration at the outlet of the reactor was reduced ca. 93% by using this technique. The electric energy consumption for the reaction was about 50% smaller by reducing the concentration of I2 indicating that the IS process can be operate efficiently at low I2 concentration. The reaction was carried out for 4 h, and the HI concentration was increased by 26%. This amount was the same within 10% as the values calculated from the total loaded electricity. In order to decrease the overpotential at the anode side, small amount of HI was added to the anode side solution. The total voltage was reduced by 0.03 V by the addition of HI.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalJournal of Membrane Science
Volume240
Issue number1-2
DOIs
Publication statusPublished - 2004 Sep 1
Externally publishedYes

Keywords

  • Bunsen reaction
  • Cation exchange membrane
  • Electrochemical membrane reactor
  • Hydrogen production

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Fingerprint Dive into the research topics of 'Application of an electrochemical membrane reactor to the thermochemical water splitting IS process for hydrogen production'. Together they form a unique fingerprint.

Cite this