Acceleration of hydrogen production during water-olivine-CO2 reactions via high-temperature-facilitated Fe(II) release

Jiajie Wang; Noriaki Watanabe; Atsushi Okamoto; Kengo Nakamura; Takeshi Komai

doi:10.1016/j.ijhydene.2019.03.119

Acceleration of hydrogen production during water-olivine-CO₂ reactions via high-temperature-facilitated Fe(II) release

Jiajie Wang, Noriaki Watanabe, Atsushi Okamoto, Kengo Nakamura, Takeshi Komai

ENV - Environmental Studies for Advanced Society

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

7 Citations (Scopus)

Abstract

The effects of temperature on hydrogen (H₂) production in the alteration of olivine [(Mg,Fe)₂SiO₄] have been investigated under both CO₂-rich (0.5 mol/L NaHCO₃) and CO₂-free conditions at 225–300 °C. Under CO₂-rich conditions, H₂ production rates showed strong temperature dependence, where the rate drastically increased for ≥275 °C, while the rate in CO₂-free conditions was less temperature-dependent. At 300 °C under CO₂-rich conditions, the H₂ generation rate was 3 times faster than that under CO₂-free conditions, and a considerable amount of CO₂ was simultaneously stored as magnesite [(Mg,Fe)CO₃]. Increasing the temperature under CO₂-rich conditions promoted olivine consumption, while suppressing both brucite [(Mg,Fe)(OH)₂] formation and incorporation of Fe(II) into secondary minerals, thus facilitating Fe(II) release and oxidation to produce H₂. It has been revealed for the first time that H₂ production during water-olivine-CO₂ reactions is markedly accelerated via high-temperature-facilitated Fe(II) release.

Original language	English
Pages (from-to)	11514-11524
Number of pages	11
Journal	International Journal of Hydrogen Energy
Volume	44
Issue number	23
DOIs	https://doi.org/10.1016/j.ijhydene.2019.03.119
Publication status	Published - 2019 May 3

Keywords

CO storage
CO-rich
High temperature
Hydrogen production
Olivine alteration

ASJC Scopus subject areas

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2019.03.119

Cite this

@article{77ef1284172c4f7abae5ad9d6903bc61,

title = "Acceleration of hydrogen production during water-olivine-CO2 reactions via high-temperature-facilitated Fe(II) release",

abstract = "The effects of temperature on hydrogen (H2) production in the alteration of olivine [(Mg,Fe)2SiO4] have been investigated under both CO2-rich (0.5 mol/L NaHCO3) and CO2-free conditions at 225–300 °C. Under CO2-rich conditions, H2 production rates showed strong temperature dependence, where the rate drastically increased for ≥275 °C, while the rate in CO2-free conditions was less temperature-dependent. At 300 °C under CO2-rich conditions, the H2 generation rate was 3 times faster than that under CO2-free conditions, and a considerable amount of CO2 was simultaneously stored as magnesite [(Mg,Fe)CO3]. Increasing the temperature under CO2-rich conditions promoted olivine consumption, while suppressing both brucite [(Mg,Fe)(OH)2] formation and incorporation of Fe(II) into secondary minerals, thus facilitating Fe(II) release and oxidation to produce H2. It has been revealed for the first time that H2 production during water-olivine-CO2 reactions is markedly accelerated via high-temperature-facilitated Fe(II) release.",

keywords = "CO storage, CO-rich, High temperature, Hydrogen production, Olivine alteration",

author = "Jiajie Wang and Noriaki Watanabe and Atsushi Okamoto and Kengo Nakamura and Takeshi Komai",

note = "Funding Information: This work was funded by Japan Society for the Promotion of Science (JSPS, 201812695 ). The authors would like to thank Ryosuke Oyanagi for TG analysis. Publisher Copyright: {\textcopyright} 2019 Hydrogen Energy Publications LLC",

year = "2019",

month = may,

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doi = "10.1016/j.ijhydene.2019.03.119",

language = "English",

volume = "44",

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journal = "International Journal of Hydrogen Energy",

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T1 - Acceleration of hydrogen production during water-olivine-CO2 reactions via high-temperature-facilitated Fe(II) release

AU - Wang, Jiajie

AU - Watanabe, Noriaki

AU - Okamoto, Atsushi

AU - Nakamura, Kengo

AU - Komai, Takeshi

N1 - Funding Information: This work was funded by Japan Society for the Promotion of Science (JSPS, 201812695 ). The authors would like to thank Ryosuke Oyanagi for TG analysis. Publisher Copyright: © 2019 Hydrogen Energy Publications LLC

PY - 2019/5/3

Y1 - 2019/5/3

N2 - The effects of temperature on hydrogen (H2) production in the alteration of olivine [(Mg,Fe)2SiO4] have been investigated under both CO2-rich (0.5 mol/L NaHCO3) and CO2-free conditions at 225–300 °C. Under CO2-rich conditions, H2 production rates showed strong temperature dependence, where the rate drastically increased for ≥275 °C, while the rate in CO2-free conditions was less temperature-dependent. At 300 °C under CO2-rich conditions, the H2 generation rate was 3 times faster than that under CO2-free conditions, and a considerable amount of CO2 was simultaneously stored as magnesite [(Mg,Fe)CO3]. Increasing the temperature under CO2-rich conditions promoted olivine consumption, while suppressing both brucite [(Mg,Fe)(OH)2] formation and incorporation of Fe(II) into secondary minerals, thus facilitating Fe(II) release and oxidation to produce H2. It has been revealed for the first time that H2 production during water-olivine-CO2 reactions is markedly accelerated via high-temperature-facilitated Fe(II) release.

AB - The effects of temperature on hydrogen (H2) production in the alteration of olivine [(Mg,Fe)2SiO4] have been investigated under both CO2-rich (0.5 mol/L NaHCO3) and CO2-free conditions at 225–300 °C. Under CO2-rich conditions, H2 production rates showed strong temperature dependence, where the rate drastically increased for ≥275 °C, while the rate in CO2-free conditions was less temperature-dependent. At 300 °C under CO2-rich conditions, the H2 generation rate was 3 times faster than that under CO2-free conditions, and a considerable amount of CO2 was simultaneously stored as magnesite [(Mg,Fe)CO3]. Increasing the temperature under CO2-rich conditions promoted olivine consumption, while suppressing both brucite [(Mg,Fe)(OH)2] formation and incorporation of Fe(II) into secondary minerals, thus facilitating Fe(II) release and oxidation to produce H2. It has been revealed for the first time that H2 production during water-olivine-CO2 reactions is markedly accelerated via high-temperature-facilitated Fe(II) release.

KW - CO storage

KW - CO-rich

KW - High temperature

KW - Hydrogen production

KW - Olivine alteration

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