Influence of Gas Injection Pipe on CO2 Decomposition by CaCl2–CaO Molten Salt and ZrO2 Solid Electrolysis

Ozawa, Sumito; Matsuno, Hidetoshi; Fujibayashi, Akio et al.

ISIJ International, 2016, 56(11), 2093-2099

Permalink : https://hdl.handle.net/2115/74856

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アクセス権
open access
URI
https://hdl.handle.net/2115/74856
タイトル
Influence of Gas Injection Pipe on CO2 Decomposition by CaCl2–CaO Molten Salt and ZrO2 Solid Electrolysis
著者
Ozawa, Sumito ; Matsuno, Hidetoshi ; Fujibayashi, Akio ; Uchiyama, Takuya ; Wakamatsu, Takafumi ; Sakaguchi, Norihito ; Suzuki, Ryosuke O.
著者名
Ozawa, Sumito
著者名
Matsuno, Hidetoshi
著者名
Fujibayashi, Akio
著者名
Uchiyama, Takuya
著者名
Wakamatsu, Takafumi
著者名
Sakaguchi, Norihito
e-Rad_Researcher
80179275
著者名
Suzuki, Ryosuke O.
言語
英語
キーワード
CO2 gas
carbon
electro-reduction
molten salt
ZrO2 solid electrolyte
発行日
2016-11-15
出版者
日本鉄鋼協会
Iron and Steel Institute of Japan
収録物名
ISIJ International
巻(号)
56(11)
ページ
2093-2099
抄録
The electrochemical decomposition of carbon dioxide to form carbon and oxygen gas in CaCl2–CaO molten salt was studied. A water model experiment was carried out to study the influence of the tip shape of the pipe, the pipe diameter and the wettability of the gas injection pipe on the bubble shape in the molten salt. Bubbles were formed with both a horizontal tip and an oblique tip when the wettability of the gas injection pipe was good. The specific surface area of the bubbles when using the oblique tip was smaller than when using the horizontal tip. On the other hand, slug flows appeared when wettability was poor. In a hot model experiment, the current density was measured, and it was found that the CO2 gas concentration decreased. Precipitated carbon was detected from the sample after the experiment. With the same pipe, the decrease of the CO2 gas concentration when using the oblique tip was more remarkable than when using the horizontal tip. It is likely that the form of the CO2 gas in the molten salt was bubble-shaped.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
著作権は日本鉄鋼協会にある
PISSN
0915-1559
EISSN
1347-5460
NCID
AA10680712
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.2355/isijinternational.ISIJINT-2016-179