Capture and electrochemical conversion of CO2 to value-added carbon and oxygen by molten salt electrolysis

Yin, Huayi; Mao, Xuhui; Tang, Diyong; Xiao, Wei; Xing, Luru; Zhu, Hua; Wang, Dihua; Sadoway, Donald R.

doi:10.1039/c3ee24132g

Cited by 275 publications

(267 citation statements)

References 42 publications

Supporting

Mentioning

251

Contrasting

Order By: Relevance

“…[34][35][36] On the contrary, the inherent advantage of the electrochemical process is its environmental compatibility since the electron is a ''clean/green'' reagent. [37][38][39] Li et al [17] and Haarberg et al [40] successively obtained pure iron metal from iron(III) oxide by the direct electroreduction/electrodeposition routes in molten salts at temperature >1073 K (800°C). Cox and Fray [12,13] pioneered their work on the iron production from Fe(III) oxide by electrochemical reduction at a lower temperature of about 803 K (530°C) in molten NaOH.…”

Section: Introductionmentioning

confidence: 99%

Electroreduction of Iron(III) Oxide Pellets to Iron in Alkaline Media: A Typical Shrinking-Core Reaction Process

Zou

et al. 2015

Metall Mater Trans B

View full text Add to dashboard Cite

Low temperature electrochemical reduction of iron(III) oxide to iron in a strongly alkaline solution has been systematically investigated in this article. The facile electrochemical process was carried out in 50 to 70 wt pct aqueous NaOH solution at 383 K (110°C) and 1.7 V. The preformed spherical Fe 2 O 3 pellets with porous structures were used directly as precursors for the electrolytic production of iron. The influences of the experimental parameters on the electroreduction process and the characteristics of the iron products as well as the reaction mechanisms were investigated. The results show that the precursor's pre-sintering process and the concentration of NaOH aqueous electrolyte have significant influences on the electroreduction process. The electroreduction-generated spherical metallic iron layer comprising dendritic iron crystals is first formed on the surface of Fe 2 O 3 pellet precursor and then extends gradually into the pellet's interior along the radial direction. The electroreduction process is confirmed to be a typical shrinking-core reaction process. The direct solid state electroreduction mechanism and the dissolution-electrodeposition mechanism coexist in the electrochemical process. The experimental observations suggest that the dissolution-electrodeposition mechanism appears to be the dominant mechanism under the experimental conditions employed in this study. This facile process may open a new green electricitybased route for the production of dendritic iron crystals from iron(III) oxide in alkaline media.

show abstract

Section: Introductionmentioning

confidence: 99%

Electroreduction of Iron(III) Oxide Pellets to Iron in Alkaline Media: A Typical Shrinking-Core Reaction Process

Zou

et al. 2015

Metall Mater Trans B

View full text Add to dashboard Cite

show abstract

“…It has been suggested that CO 2 can be reduced indirectly through the reduction of carbonates and their regeneration by absorption of CO 2 . [13][14][15] Other authors studied the direct reduction of CO 2 into CO via a radical CO 2− . 16 Peelen et al 17 have studied CO 2 reduction in Li 2 CO 3 -K 2 CO 3 (62:38 mol%), in the temperature range of 575-800…”

mentioning

confidence: 99%

Chronopotentiometric Approach of CO₂Reduction in Molten Carbonates

Brouzgou

Crapart

Albin

et al. 2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

Carbon capture and valorization is a new route increasingly discussed to reduce greenhouse gas emissions. One of the paths foreseen for CO 2 valorization is its transformation into fuels by electrochemical reduction of carbon dioxide. In this approach, molten carbonates are of particular interest since they can be used to capture CO 2 molecule because of its high solubility; hence, valorization by electrolysis is possible in molten carbonate media. To better understand CO 2 reduction, chronopotentiometric and chronoamperometric techniques were used at gold and graphite electrodes immersed in four alkali carbonate eutectics, Li-Na, Li-K, Li-Na-K and Na-K. The results complemented a previous work based on cyclic voltammetry and confirmed the existence of a main CO 2 reduction phenomena around −1.2 V vs Ag/Ag + that involves two one-electron steps or a two-electron unique step. Transition time analysis showed that the reduction mechanism is either simultaneous reduction of CO 2 adsorbed and diffusion species or rapid equilibrium between adsorbed and diffusing species. Furthermore, we identified another electrochemical system involving adsorbed CO 2 and CO at higher potentials. In summary, we have succeeded in proving and précising some previous results, as well as identifying reduction mechanisms.

show abstract

“…[118][119][120][121]. Carbon dioxide has been identified as one such potential vector molecule (through reduction to syngas, methanol, methane, formic acid, formaldehyde, dimethylether (DME) and short-chain olefins) [117][118][120][121][122]. CO 2 is a kinetically and thermodynamically stable molecule, so CO 2 conversion reactions are endothermic and need efficient catalysts to obtain high yield.…”

Section: Chemical Transformation Of Co 2 Catalyzed By Ceramic Materiamentioning

confidence: 99%

Catalytic Constructive Deoxygenation of Lignin-Derived phenols: New C–C Bond Formation Processes from Imidazole-Sulfonates and Ether Cleavage Reactions

2015

Advanced Biofuels

View full text Add to dashboard Cite

Capture and electrochemical conversion of CO2 to value-added carbon and oxygen by molten salt electrolysis

Cited by 275 publications

References 42 publications

Electroreduction of Iron(III) Oxide Pellets to Iron in Alkaline Media: A Typical Shrinking-Core Reaction Process

Electroreduction of Iron(III) Oxide Pellets to Iron in Alkaline Media: A Typical Shrinking-Core Reaction Process

Chronopotentiometric Approach of CO₂Reduction in Molten Carbonates

Catalytic Constructive Deoxygenation of Lignin-Derived phenols: New C–C Bond Formation Processes from Imidazole-Sulfonates and Ether Cleavage Reactions

Contact Info

Product

Resources

About

Capture and electrochemical conversion of CO2 to value-added carbon and oxygen by molten salt electrolysis

Cited by 275 publications

References 42 publications

Electroreduction of Iron(III) Oxide Pellets to Iron in Alkaline Media: A Typical Shrinking-Core Reaction Process

Electroreduction of Iron(III) Oxide Pellets to Iron in Alkaline Media: A Typical Shrinking-Core Reaction Process

Chronopotentiometric Approach of CO2Reduction in Molten Carbonates

Catalytic Constructive Deoxygenation of Lignin-Derived phenols: New C–C Bond Formation Processes from Imidazole-Sulfonates and Ether Cleavage Reactions

Contact Info

Product

Resources

About

Chronopotentiometric Approach of CO₂Reduction in Molten Carbonates