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

doi:10.1016/j.ces.2021.117155

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

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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 language	English
Article number	117155
Journal	Chemical Engineering Science
Volume	248
DOIs	https://doi.org/10.1016/j.ces.2021.117155
Publication status	Published - 2022 Feb 2

Keywords

Ammonia gas
Gas dissolution
Hydrogen
Microbubble

ASJC Scopus subject areas

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

Access to Document

10.1016/j.ces.2021.117155

Cite this

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

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.",

keywords = "Ammonia gas, Gas dissolution, Hydrogen, Microbubble",

author = "Taro Kobayashi and Satoko Fujioka and Shunya Tanaka and Koichi Terasaka",

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AU - Tanaka, Shunya

AU - Terasaka, Koichi

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AB - 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.

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