Hydrogen production tests by hydrogen iodide decomposition membrane reactor equipped with silica-based ceramics membrane

Odtsetseg Myagmarjav, Nobuyuki Tanaka, Mikihiro Nomura, Shinji Kubo

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The decomposition of hydrogen iodide in the thermochemical water splitting iodine–sulfur process at an intermediate temperature (400 °C) using a catalytic membrane reactor was reported here, for the first time. The performance of a catalytic membrane reactor based on a hexyltrimethoxysilane-derived silica membranes (H2 permeance of 9.4 × 10−7 mol Pa−1 m−2 s−1 and H2/N2 selectivity of over 80.0.) was evaluated at 400 °C by varying the HI flow rates of 2.6, 4.7, 6.9, 8.4, and 9.7 mL min−1. The silica membranes were prepared by counter-diffusion chemical vapor deposition method on γ-alumina-coated α-alumina tubes. Hydrogen was successfully extracted from the membrane reactor using the silica membrane at 400 °C. A significant increase in HI conversion was achieved. The conversion achieved at an HI flow rate of 2.6 mL min−1 was approximately 0.60, which was greater than the equilibrium conversion in HI decomposition (0.22).

Original languageEnglish
Pages (from-to)29091-29100
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number49
DOIs
Publication statusPublished - 2017 Dec 7

Keywords

  • HI conversion
  • Hydrogen production
  • Hydrogen separation
  • Inorganic membrane
  • Membrane reactor

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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