Isolation of Oxygen Formed during Catalytic Reduction of Carbon Dioxide Using a Solid Electrolyte Membrane

Furukawa, Shigeki; Okada, Masaki; Suzuki, Yohichi

doi:10.1021/ef990039t

Cited by 18 publications

(10 citation statements)

References 20 publications

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“…Pd [31,39,48,49], Pt [31,39], Ir [31,39], Ni [32,37,[51][52][53][54][55][56][57][58], Fe [32,37], Co [32], and Ni-Fe [59,60] based catalysts are effective in CO 2 methanation. Additionally, it is generally accepted that CO 2 methanation proceeds via the r-WGS step at metal-support boundary, followed by the prompt methanation of the resultant CO [31,36,41,48].…”

Section: Introductionmentioning

confidence: 99%

Role of trace chlorine in Ni/TiO2 catalyst for CO selective methanation in reformate gas

Shimoda

Shoji

Tani

et al. 2015

Applied Catalysis B: Environmental

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Section: Introductionmentioning

confidence: 99%

Role of trace chlorine in Ni/TiO2 catalyst for CO selective methanation in reformate gas

Shimoda

Shoji

Tani

et al. 2015

Applied Catalysis B: Environmental

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“…The COG voltages developed by applying a current depend on the rate of oxygen ion transport and on the rate of decomposition of the CO 2 molecules. 24 The voltage values developed by the COG remain approximately constant with time as shown in Fig. 3.…”

Section: Resultsmentioning

confidence: 87%

Lower Temperature Electrolytic Reduction of CO[sub 2] to O[sub 2] and CO with High-Conductivity Solid Oxide Bilayer Electrolytes

Park

Wachsman

2005

J. Electrochem. Soc.

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Ceramic oxygen generators ͑COGs͒ with a bilayer-electrolyte ͑erbia-stabilized bismuth oxide/samaria-doped ceria͒ architecture were developed to produce pure oxygen from CO 2 at lower temperature ͑below 700°C͒ for potential use in NASA's Mars exploration mission. Major factors that influence oxygen generation include the oxygen-ion conductivity of the solid-oxide electrolyte, applied current, operating temperature, and fuel utilization ͑CO/CO 2 ratio͒. The COG voltage power losses were due to internal resistance and electrode polarization. Higher temperatures resulted in higher oxygen generation rates due to reduced cell resistance. However, lowering the COG operating temperature is very important and the bilayer COGs showed promise for operation below 700°C, thus reducing the required power consumption, expanding ancillary material selection, decreasing fabrication cost, and potentially extending mission time.Basic concept and application of ceramic oxygen generators.-Ceramic oxygen generators ͑COGs͒ based on oxygen ion conductors produce pure O 2 via selective oxygen ion flux at high temperatures. 1,2 This novel technology provides many advantages over traditional cryogenic oxygen generating equipment, in that it is potentially economical and produces exceedingly high purity oxygen with negligible emissions of toxic gases. 3 COGs are classified according to their driving force for oxygen generation. 1,3 One subgroup of COGs uses mixed ionic-electronic conductors ͑MIECs͒, which employ an oxygen partial pressure ͑p O 2 ͒ gradient as the driving force for oxygen separation. The MIEC has substantial electronic conductivity as well as ionic conductivity, which results in an internally short-circuited oxygen-concentration cell. 4 Thus oxygen ions are transported from the high p O 2 side of the membranes to the low p O 2 side. The second subgroup uses an ion conducting membrane, such as yttria-stabilized zirconia ͑YSZ͒. Here, the driving force is an electric potential which is applied across the membrane. Under the influence of an applied electric potential, oxygen ions migrate from the cathode side to the anode side, through the dense membranes. The flux of oxygen ion migration for these membranes is predicted using the Faraday equation 5where J O 2 ͑mol/cm 2 /s͒ is the molar flux of oxygen produced, i applied is the applied current density ͑A/cm 2 ͒, F is 96 500 ͑C/mol͒, and n is the number of electrons associated with the ionization of an oxygen molecule. COG technologies have considerable potential for a wide range of applications in life-support systems, and semiconductor and gasenergy industries. 3 Ceramic oxygen-ion conducting membranes can be used for gas purification ͑separation of oxygen from an inert gas stream containing higher amounts of oxygen͒, for controlling oxygen levels in gas streams, and for producing high-purity oxygen. This technology can also be used in the combustion processes for hydrocarbon fuels ͑HCs͒, in the production of hydrogen by electrolysis of steam, and in the reduction of nitric oxi...

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“…• Electrocatalytic dry reforming process [190] • Nickel cermet (Ni-YSZ-CeO) electrode [191] Electrolyser mode at high temperature [192] Palladium CO Paladium electrode for CO2 reduction to CO [193] Copper CO Copper electrode for CO2 reduction to CO [194] Metallic electrodes in aqueous solution…”

Section: Co2 Reduction Reactionmentioning

confidence: 99%

Flexible Carbon Capture and Utilization technologies in future energy systems and the utilization pathways of captured CO2

Mikulčić

Skov

Dominković

et al. 2019

Renewable and Sustainable Energy Reviews

176

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Isolation of Oxygen Formed during Catalytic Reduction of Carbon Dioxide Using a Solid Electrolyte Membrane

Cited by 18 publications

References 20 publications

Role of trace chlorine in Ni/TiO2 catalyst for CO selective methanation in reformate gas

Role of trace chlorine in Ni/TiO2 catalyst for CO selective methanation in reformate gas

Lower Temperature Electrolytic Reduction of CO[sub 2] to O[sub 2] and CO with High-Conductivity Solid Oxide Bilayer Electrolytes

Flexible Carbon Capture and Utilization technologies in future energy systems and the utilization pathways of captured CO2

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