Hydrogen production by SI process, with electrodialysis stack embedded in HI decomposition section

Kyoung Soo Kang; Chang Hee Kim; Jong Won Kim; Won Chul Cho; Seong Uk Jeong; Chu Sik Park; Byung Heung Park; Jeong Won Kang; Ki Kwang Bae

doi:10.1016/j.ijhydene.2015.12.101

Hydrogen production by SI process, with electrodialysis stack embedded in HI decomposition section

Kyoung Soo Kang, Chang Hee Kim, Jong Won Kim, Won Chul Cho, Seong Uk Jeong, Chu Sik Park, Byung Heung Park, Jeong Won Kang, Ki Kwang Bae

Department of Chemical and Biological Engineering

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

8 Citations (Scopus)

Abstract

Hydrogen production by the sulfur-iodine (SI) process, with an electrodialysis (ED) stack embedded in the HI decomposition section (SEC3) to concentrate HI in the HIx solution and overcome the pseudo-azeotrope, was conducted under pressurized conditions. The HIx solution of H₂O/HI = 5.63-6.13 and I₂/HI = 0.57-1.97 was supplied to the SEC3. HI gas was concentrated in a packed distillation column and decomposed over Pt/Al₂O₃. The experimental results of distillation column operation under different feed rates and HIx compositions are reported. The raffinate from the column showed a pseudo-azeotropic HIx mixture, as predicted in previous research. The dynamic responses of the ED stack were examined during the start-up period according to the HIx feed composition at the anode inlet. The ED voltage changed with the I₂ concentration in the inlet flow. The proton transport number (t⁺) and electro-osmosis coefficient (β) were estimated for the ED stack during the operations. Hydrogen production ranged from 18.3 to 50 L/h, depending on the operating conditions and HIx feed composition.

Original language	English
Pages (from-to)	4560-4569
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	41
Issue number	8
DOIs	https://doi.org/10.1016/j.ijhydene.2015.12.101
Publication status	Published - 2016 Mar 2

Keywords

Electrodialysis
Nuclear hydrogen
Sulfur-iodine process
Thermochemical cycle
Water splitting

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

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Hydrogen production by SI process, with electrodialysis stack embedded in HI decomposition section. / Kang, Kyoung Soo; Kim, Chang Hee; Kim, Jong Won; Cho, Won Chul; Jeong, Seong Uk; Park, Chu Sik; Park, Byung Heung; Kang, Jeong Won; Bae, Ki Kwang.

In: International Journal of Hydrogen Energy, Vol. 41, No. 8, 02.03.2016, p. 4560-4569.

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

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title = "Hydrogen production by SI process, with electrodialysis stack embedded in HI decomposition section",

abstract = "Hydrogen production by the sulfur-iodine (SI) process, with an electrodialysis (ED) stack embedded in the HI decomposition section (SEC3) to concentrate HI in the HIx solution and overcome the pseudo-azeotrope, was conducted under pressurized conditions. The HIx solution of H2O/HI = 5.63-6.13 and I2/HI = 0.57-1.97 was supplied to the SEC3. HI gas was concentrated in a packed distillation column and decomposed over Pt/Al2O3. The experimental results of distillation column operation under different feed rates and HIx compositions are reported. The raffinate from the column showed a pseudo-azeotropic HIx mixture, as predicted in previous research. The dynamic responses of the ED stack were examined during the start-up period according to the HIx feed composition at the anode inlet. The ED voltage changed with the I2 concentration in the inlet flow. The proton transport number (t+) and electro-osmosis coefficient (β) were estimated for the ED stack during the operations. Hydrogen production ranged from 18.3 to 50 L/h, depending on the operating conditions and HIx feed composition.",

keywords = "Electrodialysis, Nuclear hydrogen, Sulfur-iodine process, Thermochemical cycle, Water splitting",

author = "Kang, {Kyoung Soo} and Kim, {Chang Hee} and Kim, {Jong Won} and Cho, {Won Chul} and Jeong, {Seong Uk} and Park, {Chu Sik} and Park, {Byung Heung} and Kang, {Jeong Won} and Bae, {Ki Kwang}",

note = "Funding Information: This study was performed under the mid- and long-term Nuclear R&D Projects supported by the Ministry of Science, ICT and Future Planning (2012M2A8A2025688), Republic of Korea. This work was also conducted under the framework of Research and Development Program of the Korea Institute of Energy Research (KIER) (B5-2415-02).",

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AU - Kang, Kyoung Soo

AU - Kim, Chang Hee

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AU - Jeong, Seong Uk

AU - Park, Chu Sik

AU - Park, Byung Heung

AU - Kang, Jeong Won

AU - Bae, Ki Kwang

N1 - Funding Information: This study was performed under the mid- and long-term Nuclear R&D Projects supported by the Ministry of Science, ICT and Future Planning (2012M2A8A2025688), Republic of Korea. This work was also conducted under the framework of Research and Development Program of the Korea Institute of Energy Research (KIER) (B5-2415-02).

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N2 - Hydrogen production by the sulfur-iodine (SI) process, with an electrodialysis (ED) stack embedded in the HI decomposition section (SEC3) to concentrate HI in the HIx solution and overcome the pseudo-azeotrope, was conducted under pressurized conditions. The HIx solution of H2O/HI = 5.63-6.13 and I2/HI = 0.57-1.97 was supplied to the SEC3. HI gas was concentrated in a packed distillation column and decomposed over Pt/Al2O3. The experimental results of distillation column operation under different feed rates and HIx compositions are reported. The raffinate from the column showed a pseudo-azeotropic HIx mixture, as predicted in previous research. The dynamic responses of the ED stack were examined during the start-up period according to the HIx feed composition at the anode inlet. The ED voltage changed with the I2 concentration in the inlet flow. The proton transport number (t+) and electro-osmosis coefficient (β) were estimated for the ED stack during the operations. Hydrogen production ranged from 18.3 to 50 L/h, depending on the operating conditions and HIx feed composition.

AB - Hydrogen production by the sulfur-iodine (SI) process, with an electrodialysis (ED) stack embedded in the HI decomposition section (SEC3) to concentrate HI in the HIx solution and overcome the pseudo-azeotrope, was conducted under pressurized conditions. The HIx solution of H2O/HI = 5.63-6.13 and I2/HI = 0.57-1.97 was supplied to the SEC3. HI gas was concentrated in a packed distillation column and decomposed over Pt/Al2O3. The experimental results of distillation column operation under different feed rates and HIx compositions are reported. The raffinate from the column showed a pseudo-azeotropic HIx mixture, as predicted in previous research. The dynamic responses of the ED stack were examined during the start-up period according to the HIx feed composition at the anode inlet. The ED voltage changed with the I2 concentration in the inlet flow. The proton transport number (t+) and electro-osmosis coefficient (β) were estimated for the ED stack during the operations. Hydrogen production ranged from 18.3 to 50 L/h, depending on the operating conditions and HIx feed composition.

KW - Electrodialysis

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KW - Thermochemical cycle

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