High purity, self-sustained, pressurized hydrogen production from ammonia in a catalytic membrane reactor

Jose L. Cerrillo, Natalia Sanchez Morlanes, Shekhar Rajabhau Kulkarni, Natalia Realpe, Adrian Ramírez, Sai P. Katikaneni, Stephen N. Paglieri, Kunho Lee, Aadesh Harale, Bandar Solami, Aqil Jamal, Mani Sarathy, Pedro Castaño, Jorge Gascon

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


The combination of catalytic decomposition of ammonia and in situ separation of hydrogen holds great promise for the use of ammonia as a clean energy carrier. However, finding the optimal catalyst – membrane pair and operation conditions have proved challenging. Here, we demonstrate that cobalt-based catalysts for ammonia decomposition can be efficiently used together with a Pd-Au based membrane to produce high purity hydrogen at elevated pressure. Compared to a conventional packed bed reactor, the membrane reactor offers several operational advantages that result in energetic and economic benefits. The robustness and durability of the combined system has been demonstrated for>1000 h on stream, yielding a very pure hydrogen stream (>99.97 % H2) and recovery (>90 %). When considering the required hydrogen compression for storage/utilization and environmental issues, the combined system offers the additional advantage of production of hydrogen at moderate pressures along with full ammonia conversion. Altogether, our results demonstrate the possibility of deploying high pressure (350 bar) hydrogen generators from ammonia with H2 efficiencies of circa 75% without any external energy input and/or derived CO2 emissions.
Original languageEnglish (US)
Pages (from-to)134310
JournalChemical Engineering Journal
StatePublished - Dec 24 2021

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Chemical Engineering
  • General Chemistry
  • Industrial and Manufacturing Engineering


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