Syngas production: Diverse H2/CO range by regulating carbonates electrolyte composition from CO2/H2O: Via co-electrolysis in eutectic molten salts

Yue Liu; Dandan Yuan; Deqiang Ji; Zhida Li; Zhonghai Zhang; Baohui Wang; Hongjun Wu

doi:10.1039/c7ra07320h

Syngas production: Diverse H₂/CO range by regulating carbonates electrolyte composition from CO₂/H₂O: Via co-electrolysis in eutectic molten salts

Yue Liu
, Dandan Yuan
, Deqiang Ji
, Zhida Li
, Zhonghai Zhang
, Baohui Wang
, Hongjun Wu^*

^*Corresponding author for this work

School of Chemistry and Molecular Engineering

Daqing Petroleum Institute

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

26 Scopus citations

Abstract

We present a novel sustainable method for the direct production of syngas (H₂ + CO) from CO₂/H₂O co-electrolysis using a hermetic device, to address the continuously increasing level of environmental carbon dioxide (CO₂). All experiments were conducted using a two-electrode system with a coiled Fe cathode and coiled Ni anode in eutectic mixtures of binary and ternary carbonates with hydroxide in a 0.1:1 hydroxide/carbonate ratio. With an applied voltage of 1.6-2.6 V and an operating temperature of 500-600 °C, the H₂/CO product ratio was easily tuned from 0.53 to 8.08 through renewable cycling of CO₂ and H₂O. The Li_0.85Na_0.61K_0.54CO₃-0.1LiOH composite had the highest current efficiency among those tested, with an optimum value approaching ∼93%. This study provides a promising technique for the electrochemical conversion of CO₂/H₂O to a controllable syngas feedstock that can be used in a broad range of industrial applications.

Original language	English
Pages (from-to)	52414-52422
Number of pages	9
Journal	RSC Advances
Volume	7
Issue number	83
DOIs	https://doi.org/10.1039/c7ra07320h
State	Published - 2017

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title = "Syngas production: Diverse H2/CO range by regulating carbonates electrolyte composition from CO2/H2O: Via co-electrolysis in eutectic molten salts",

abstract = "We present a novel sustainable method for the direct production of syngas (H2 + CO) from CO2/H2O co-electrolysis using a hermetic device, to address the continuously increasing level of environmental carbon dioxide (CO2). All experiments were conducted using a two-electrode system with a coiled Fe cathode and coiled Ni anode in eutectic mixtures of binary and ternary carbonates with hydroxide in a 0.1:1 hydroxide/carbonate ratio. With an applied voltage of 1.6-2.6 V and an operating temperature of 500-600 °C, the H2/CO product ratio was easily tuned from 0.53 to 8.08 through renewable cycling of CO2 and H2O. The Li0.85Na0.61K0.54CO3-0.1LiOH composite had the highest current efficiency among those tested, with an optimum value approaching ∼93\%. This study provides a promising technique for the electrochemical conversion of CO2/H2O to a controllable syngas feedstock that can be used in a broad range of industrial applications.",

author = "Yue Liu and Dandan Yuan and Deqiang Ji and Zhida Li and Zhonghai Zhang and Baohui Wang and Hongjun Wu",

note = "Publisher Copyright: {\textcopyright} 2017 The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c7ra07320h",

language = "英语",

volume = "7",

pages = "52414--52422",

journal = "RSC Advances",

issn = "2046-2069",

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T2 - Diverse H2/CO range by regulating carbonates electrolyte composition from CO2/H2O: Via co-electrolysis in eutectic molten salts

AU - Liu, Yue

AU - Yuan, Dandan

AU - Ji, Deqiang

AU - Li, Zhida

AU - Zhang, Zhonghai

AU - Wang, Baohui

AU - Wu, Hongjun

PY - 2017

Y1 - 2017

N2 - We present a novel sustainable method for the direct production of syngas (H2 + CO) from CO2/H2O co-electrolysis using a hermetic device, to address the continuously increasing level of environmental carbon dioxide (CO2). All experiments were conducted using a two-electrode system with a coiled Fe cathode and coiled Ni anode in eutectic mixtures of binary and ternary carbonates with hydroxide in a 0.1:1 hydroxide/carbonate ratio. With an applied voltage of 1.6-2.6 V and an operating temperature of 500-600 °C, the H2/CO product ratio was easily tuned from 0.53 to 8.08 through renewable cycling of CO2 and H2O. The Li0.85Na0.61K0.54CO3-0.1LiOH composite had the highest current efficiency among those tested, with an optimum value approaching ∼93%. This study provides a promising technique for the electrochemical conversion of CO2/H2O to a controllable syngas feedstock that can be used in a broad range of industrial applications.

AB - We present a novel sustainable method for the direct production of syngas (H2 + CO) from CO2/H2O co-electrolysis using a hermetic device, to address the continuously increasing level of environmental carbon dioxide (CO2). All experiments were conducted using a two-electrode system with a coiled Fe cathode and coiled Ni anode in eutectic mixtures of binary and ternary carbonates with hydroxide in a 0.1:1 hydroxide/carbonate ratio. With an applied voltage of 1.6-2.6 V and an operating temperature of 500-600 °C, the H2/CO product ratio was easily tuned from 0.53 to 8.08 through renewable cycling of CO2 and H2O. The Li0.85Na0.61K0.54CO3-0.1LiOH composite had the highest current efficiency among those tested, with an optimum value approaching ∼93%. This study provides a promising technique for the electrochemical conversion of CO2/H2O to a controllable syngas feedstock that can be used in a broad range of industrial applications.

UR - https://www.scopus.com/pages/publications/85034611990

U2 - 10.1039/c7ra07320h

DO - 10.1039/c7ra07320h

M3 - 文章

AN - SCOPUS:85034611990

SN - 2046-2069

VL - 7

SP - 52414

EP - 52422

JO - RSC Advances

JF - RSC Advances

IS - 83

ER -

Syngas production: Diverse H₂/CO range by regulating carbonates electrolyte composition from CO₂/H₂O: Via co-electrolysis in eutectic molten salts

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