Methane steam reforming using a membrane reactor equipped with a Pd-based composite membrane for effective hydrogen production

Chang Hyun Kim, Jae Yun Han, Hankwon Lim, Kwan Young Lee, Shin Kun Ryi

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Herein, a methane steam reforming (MSR) reaction was carried out using a Pd composite membrane reactor packed with a commercial Ru/Al2O3 catalyst under mild operating conditions, to produce hydrogen with CO2 capture. The Pd composite membrane was fabricated on a tubular stainless steel support by the electroless plating (ELP) method. The membrane exhibited a hydrogen permeance of 2.26 × 10−3 mol m2 s−1 Pa−0.5, H2/N2 selectivity of 145 at 773 K, and pressure difference of 20.3 kPa. The MSR reaction, which was carried out at steam to carbon ratio (S/C) = 3.0, gas hourly space velocity (GHSV) = 1700 h−1, and 773 K, showed that methane conversion increased with the pressure difference and reached 79.5% at ΔP = 506 kPa. This value was ∼1.9 time higher than the equilibrium value at 773 K and 101 kPa. Comparing with the previous studies which introduced sweeping gas for low hydrogen partial pressure in the permeate stream, very high pressure difference (2500–2900 kPa) for increase of hydrogen recovery and very low GHSV (<150) for increase hydraulic retention time (HRT), our result was worthy of notice. The gas composition monitored during the long-term stability test showed that the permeate side was composed of 97.8 vol% H2, and the retentate side contained 67.8 vol% CO2 with 22.2 vol% CH4. When energy was recovered by CH4 combustion in the retentate streams, pre-combustion carbon capture was accomplished using the Pd-based composite membrane reactor.

Original languageEnglish
Pages (from-to)5863-5872
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number11
DOIs
Publication statusPublished - 2018 Mar 15

Keywords

  • Hydrogen
  • Long-term stability
  • Membrane reactor
  • Methane steam reforming
  • Pd-based membrane
  • Pre-combustion

ASJC Scopus subject areas

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

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