Microbubble generation with rapid dissolution of ammonia (NH3)-hydrogen (H2) mixed gas fed from a nozzle into water

Taro Kobayashi, Satoko Fujioka, Shunya Tanaka, Koichi Terasaka

Research output: Contribution to journalArticlepeer-review

Abstract

Because of their useful characteristics, microbubbles attracted much interest in industry and medicine. In this study, we developed a novel method of generating microbubbles through the chemical absorption of ammonia (NH3). By using an ultrahigh-speed camera, consecutive images of bubble formation were captured, and the microbubble generation mechanism was investigated. The effects of the gas flow rate and ammonia concentration in the liquid phase on the size of the microbubbles were examined. The hydrogen (H2) gas flow rate was found not to demonstrate a significant effect on the bubble diameter. The diameter of the microbubbles increased as the superficial velocity of the gas mixture (NH3 – H2) decreased.

Original languageEnglish
Article number117155
JournalChemical Engineering Science
Volume248
DOIs
Publication statusPublished - 2022 Feb 2

Keywords

  • Ammonia gas
  • Gas dissolution
  • Hydrogen
  • Microbubble

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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