Aqueous-phase plasma method for selective decomposition of ammonia generated as a byproduct in a hydrazine hydrate fuel cell system

Yoshikazu Iseki, Ryouhei Iwasaki, Tomokazu Sakamoto, Susumu Yamaguchi, Yoshiteru Mizukoshi

Research output: Contribution to journalArticlepeer-review

Abstract

Selective decomposition by plasma generated in the aqueous phase was investigated as a means to remove ammonia accumulated as a byproduct in hydrazine hydrate (HH) fuel solution in a HH fuel cell system. When plasma was generated in an aqueous solution of ammonia, volatile ammonia molecules readily entered the plasma phase and were directly decomposed to form molecular hydrogen and nitrogen. On the other hand, non-volatile HH molecules in water were degraded by the secondary reaction with reactive oxygen species (ROS) such as hydrogen peroxide generated from the plasma decomposition of water. Because ammonia can preferentially enter the plasma and consume ROS via a redox reaction, HH decomposition is expected to be depressed. The present method was found to be a promising elemental technology in the practical usage of a HH fuel cell system.

Original languageEnglish
Pages (from-to)86-90
Number of pages5
Journalkagaku kogaku ronbunshu
Volume45
Issue number2
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Ammonia
  • Fuel Cell
  • Hydrazine Hydrate
  • Plasma

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Aqueous-phase plasma method for selective decomposition of ammonia generated as a byproduct in a hydrazine hydrate fuel cell system'. Together they form a unique fingerprint.

Cite this