Highly selective Pd composite membrane on porous metal support for high-purity hydrogen production through effective ammonia decomposition

Tae Woo Kim, Eun Han Lee, Segi Byun, Doo Won Seo, Hyo Jung Hwang, Hyung Chul Yoon, Hansung Kim, Shin Kun Ryi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In this study, an alumina sol assisted pretreatment method for porous metal supports was investigated for a highly selective Pd composite membrane for ammonia decomposition. Alumina sol made of boehmite was applied to an yttria-stabilized zirconia (YSZ) filled porous Inconel support. Additionally, a vacuum-assisted, two-step electroless plating of Pd drastically increased the hydrogen selectivity. The hydrogen permeation flux and selectivity (H2/N2) measured at 723 K and a transmembrane pressure difference of 100 kPa were 3.40 × 10−1 mol m−2 s−1 and 8,050, respectively. A highly selective Pd composite membrane was applied to a membrane reactor combined with a Ru/Al2O3 catalyst to efficiently produce high-purity hydrogen by ammonia decomposition. The ammonia decomposition test showed that the membrane reactor was able to achieve a high ammonia conversion (99.6%) and a high hydrogen purity (99.99%) with a hydrogen production rate of 0.25 Nm3 h−1 at 745 K and a gauge pressure of 500 kPa. The Pd composite membrane reactor has the advantage of being able to selectively removing hydrogen, increasing the ammonia conversion rate and high-purity hydrogen production via a one-step reaction combined with purification.

Original languageEnglish
Article number125209
Publication statusPublished - 2022 Dec 1

Bibliographical note

Funding Information:
This work was supported by the Korea Evaluation Institute of Industrial Technology (KEIT), Alchemist project, Republic of Korea (No. 20012383 ). This work was conducted under the framework of Research and Development Program of the Korea Institute of Energy Research (KIER) ( C2-2415 ).

Publisher Copyright:
© 2022 The Authors

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Renewable Energy, Sustainability and the Environment
  • Building and Construction
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Pollution
  • Mechanical Engineering
  • Energy(all)
  • Management, Monitoring, Policy and Law
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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