CO gas production by CO2 gas decomposition in molten salt electrolysis

R. O. Suzuki; F. Matsuura; S. Natsui; T. Kikuchi

doi:10.1149/07515.0533ecst

CO gas production by CO₂ gas decomposition in molten salt electrolysis

R. O. Suzuki, F. Matsuura, S. Natsui, T. Kikuchi

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

After complete decomposition of CO₂ gas, carbon and oxygen can be used in the steel plant. In addition, CO gas may be used as an effective fuel with easy handling. The preferential decomposition to CO gas is examined by using a combination of CaCl2-CaO melt as a media and ZrO2-8mol% Y2O3 solid-state electrolyte as anode. At a higher electrolysis temperature, CO₂ gas is preferentially converted to CO gas. The conversion ratio approached the maximum value of 88.2% at 1273 K. The highest CO concentration was generated at cell voltage of 2.55 V, which is slightly lower than the theoretical decomposition voltage of CaO. Therefore, CO₂ decomposes preferentially via the decomposition reaction of carbonate ions. Namely CO₂ gas dissolves to form CO32- with coexistence of CaO in the melt, CO32- precipitates carbon or CO gas bubbles on the cathode, and a part of carbon reacts with the blown CO₂ gas to form CO gas.

Original language	English
Title of host publication	Molten Salts and Ionic Liquids 20
Editors	M. Carter, F. Endres, E. J. Biddinger, M. Reichert, A. Ispas, H. C. De Long, A. Bund, L. M. Haverhals, R. A. Mantz, P. C. Trulove, D. M. Fox, A. H. Suroviec, M. Ueda
Publisher	Electrochemical Society Inc.
Pages	533-542
Number of pages	10
Edition	15
ISBN (Electronic)	9781607685395
DOIs	https://doi.org/10.1149/07515.0533ecst
Publication status	Published - 2016 Jan 1
Externally published	Yes
Event	Symposium on Molten Salts and Ionic Liquids 20 - PRiME 2016/230th ECS Meeting - Honolulu, United States Duration: 2016 Oct 2 → 2016 Oct 7

Publication series

Name	ECS Transactions
Number	15
Volume	75
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	Symposium on Molten Salts and Ionic Liquids 20 - PRiME 2016/230th ECS Meeting
Country	United States
City	Honolulu
Period	16/10/2 → 16/10/7

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1149/07515.0533ecst

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Suzuki, R. O., Matsuura, F., Natsui, S., & Kikuchi, T. (2016). CO gas production by CO₂ gas decomposition in molten salt electrolysis. In M. Carter, F. Endres, E. J. Biddinger, M. Reichert, A. Ispas, H. C. De Long, A. Bund, L. M. Haverhals, R. A. Mantz, P. C. Trulove, D. M. Fox, A. H. Suroviec, & M. Ueda (Eds.), Molten Salts and Ionic Liquids 20 (15 ed., pp. 533-542). (ECS Transactions; Vol. 75, No. 15). Electrochemical Society Inc.. https://doi.org/10.1149/07515.0533ecst

CO gas production by CO₂ gas decomposition in molten salt electrolysis. / Suzuki, R. O.; Matsuura, F.; Natsui, S.; Kikuchi, T.

Molten Salts and Ionic Liquids 20. ed. / M. Carter; F. Endres; E. J. Biddinger; M. Reichert; A. Ispas; H. C. De Long; A. Bund; L. M. Haverhals; R. A. Mantz; P. C. Trulove; D. M. Fox; A. H. Suroviec; M. Ueda. 15. ed. Electrochemical Society Inc., 2016. p. 533-542 (ECS Transactions; Vol. 75, No. 15).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Suzuki, RO, Matsuura, F, Natsui, S & Kikuchi, T 2016, CO gas production by CO₂ gas decomposition in molten salt electrolysis. in M Carter, F Endres, EJ Biddinger, M Reichert, A Ispas, HC De Long, A Bund, LM Haverhals, RA Mantz, PC Trulove, DM Fox, AH Suroviec & M Ueda (eds), Molten Salts and Ionic Liquids 20. 15 edn, ECS Transactions, no. 15, vol. 75, Electrochemical Society Inc., pp. 533-542, Symposium on Molten Salts and Ionic Liquids 20 - PRiME 2016/230th ECS Meeting, Honolulu, United States, 16/10/2. https://doi.org/10.1149/07515.0533ecst

Suzuki RO, Matsuura F, Natsui S, Kikuchi T. CO gas production by CO₂ gas decomposition in molten salt electrolysis. In Carter M, Endres F, Biddinger EJ, Reichert M, Ispas A, De Long HC, Bund A, Haverhals LM, Mantz RA, Trulove PC, Fox DM, Suroviec AH, Ueda M, editors, Molten Salts and Ionic Liquids 20. 15 ed. Electrochemical Society Inc. 2016. p. 533-542. (ECS Transactions; 15). https://doi.org/10.1149/07515.0533ecst

Suzuki, R. O. ; Matsuura, F. ; Natsui, S. ; Kikuchi, T. / CO gas production by CO₂ gas decomposition in molten salt electrolysis. Molten Salts and Ionic Liquids 20. editor / M. Carter ; F. Endres ; E. J. Biddinger ; M. Reichert ; A. Ispas ; H. C. De Long ; A. Bund ; L. M. Haverhals ; R. A. Mantz ; P. C. Trulove ; D. M. Fox ; A. H. Suroviec ; M. Ueda. 15. ed. Electrochemical Society Inc., 2016. pp. 533-542 (ECS Transactions; 15).

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abstract = "After complete decomposition of CO2 gas, carbon and oxygen can be used in the steel plant. In addition, CO gas may be used as an effective fuel with easy handling. The preferential decomposition to CO gas is examined by using a combination of CaCl2-CaO melt as a media and ZrO2-8mol% Y2O3 solid-state electrolyte as anode. At a higher electrolysis temperature, CO2 gas is preferentially converted to CO gas. The conversion ratio approached the maximum value of 88.2% at 1273 K. The highest CO concentration was generated at cell voltage of 2.55 V, which is slightly lower than the theoretical decomposition voltage of CaO. Therefore, CO2 decomposes preferentially via the decomposition reaction of carbonate ions. Namely CO2 gas dissolves to form CO32- with coexistence of CaO in the melt, CO32- precipitates carbon or CO gas bubbles on the cathode, and a part of carbon reacts with the blown CO2 gas to form CO gas.",

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N2 - After complete decomposition of CO2 gas, carbon and oxygen can be used in the steel plant. In addition, CO gas may be used as an effective fuel with easy handling. The preferential decomposition to CO gas is examined by using a combination of CaCl2-CaO melt as a media and ZrO2-8mol% Y2O3 solid-state electrolyte as anode. At a higher electrolysis temperature, CO2 gas is preferentially converted to CO gas. The conversion ratio approached the maximum value of 88.2% at 1273 K. The highest CO concentration was generated at cell voltage of 2.55 V, which is slightly lower than the theoretical decomposition voltage of CaO. Therefore, CO2 decomposes preferentially via the decomposition reaction of carbonate ions. Namely CO2 gas dissolves to form CO32- with coexistence of CaO in the melt, CO32- precipitates carbon or CO gas bubbles on the cathode, and a part of carbon reacts with the blown CO2 gas to form CO gas.

AB - After complete decomposition of CO2 gas, carbon and oxygen can be used in the steel plant. In addition, CO gas may be used as an effective fuel with easy handling. The preferential decomposition to CO gas is examined by using a combination of CaCl2-CaO melt as a media and ZrO2-8mol% Y2O3 solid-state electrolyte as anode. At a higher electrolysis temperature, CO2 gas is preferentially converted to CO gas. The conversion ratio approached the maximum value of 88.2% at 1273 K. The highest CO concentration was generated at cell voltage of 2.55 V, which is slightly lower than the theoretical decomposition voltage of CaO. Therefore, CO2 decomposes preferentially via the decomposition reaction of carbonate ions. Namely CO2 gas dissolves to form CO32- with coexistence of CaO in the melt, CO32- precipitates carbon or CO gas bubbles on the cathode, and a part of carbon reacts with the blown CO2 gas to form CO gas.

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