Thermochemical two-step CO2 splitting using La0.7Sr0.3Mn0.9Cr0.1O3 of perovskite oxide for solar fuel production

Sawaguri, Hiroki; Gokon, Nobuyuki; Ito, Naoki; Bellan, Selvan; Kodama, Tetsuya; Cho, Hyunseok

doi:10.1063/5.0028681

Cited by 5 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 13b shows the CO productivities per gram of material and average value per duration. Previous data on the thermochemical two-step CO 2 splitting using LSM-based perovskites in a thermogravimetric reactor have been cited from the literature [29,[31][32][33]36,[39][40][41]45,47,53,67]. The best-performing samples in this study ranked at the highest level of both CO productivities compared to the reported substituted LSMs, where LSMCo0.35 exhibited the maximum CO productivity (533 µmol/g material) among the reported LSM perovskites.…”

Section: Xps Analysis Of Nonsubstituted- Ni- and Co-substituted Lsmsmentioning

confidence: 68%

Redox Performance and Optimization of the Chemical Composition of Lanthanum–Strontium–Manganese-Based Perovskite Oxide for Two-Step Thermochemical CO2 Splitting

Sawaguri,

Yasuhara,

Gokon

2023

Processes

Self Cite

View full text Add to dashboard Cite

The effects of substitution at the A- and B sites on the redox performance of a series of lanthanum–strontium–manganese (LSM)-based perovskite oxides (Z = Ni, Co, and Mg) were studied for application in a two-step thermochemical CO2 splitting cycle to produce liquid fuel from synthesis gas using concentrated solar radiation as the proposed energy source and CO2 recovered from the atmosphere as the prospective chemical source. The redox reactivity, stoichiometry of oxygen/CO production, and optimum chemical composition of Ni-, Co-, and Mg-substituted LSM perovskites were investigated to enhance oxygen/CO productivity. Furthermore, the long-term thermal stabilities and thermochemical repeatabilities of the oxides were evaluated and compared with previous data. The valence changes in the constituent ionic species of the perovskite oxides were studied and evaluated by X-ray photoelectron spectroscopy (XPS) for each step of the thermochemical cycle. From the perspectives of high redox reactivity, stoichiometric oxygen/CO production, and thermally stable repeatability in long-term thermochemical cycling, Ni0.20-, Co0.35-, and Mg0.125-substituted La0.7Sr0.3Mn perovskite oxides are the most promising materials among the LSM perovskite oxides for two-step thermochemical CO2 splitting, showing CO productivities of 387–533 μmol/g and time-averaged CO productivities of 12.9–18.0 μmol/(min·g) compared with those of LSM perovskites reported in the literature.

show abstract

Section: Xps Analysis Of Nonsubstituted- Ni- and Co-substituted Lsmsmentioning

confidence: 68%

Redox Performance and Optimization of the Chemical Composition of Lanthanum–Strontium–Manganese-Based Perovskite Oxide for Two-Step Thermochemical CO2 Splitting

Sawaguri,

Yasuhara,

Gokon

2023

Processes

Self Cite

View full text Add to dashboard Cite

show abstract

“…The 10%-20% Cr substitution at the B-site of LSM perovskites enhanced the kinetics of the oxidation step of the two-step thermochemical cycle and improved the productivity of H 2 in comparison to the Al-substituted LSMs (Gokon et al, 2019). In addition, we reported that La 0.7 Sr 0.3 Mn 0.9 Cr 0.1 O 3 (LSMC7391) has an equivalent oxidation activity for H 2 O and CO 2 splitting processes in the thermochemical cycle (Sawaguri et al, 2020). The results indicate that partial substitution with a small content at the B-site is available to improve the reactivity of LSM perovskite for a two-step thermochemical cycle, and the CO 2 /H 2 O splitting process to produce syngas (a gas mixture of H 2 and CO) can be operated using the redox material through a two-step thermochemical H 2 O/CO 2 splitting cycle.…”

Section: Introductionmentioning

confidence: 90%

Two-Step Thermochemical CO2 Splitting Using Partially-Substituted Perovskite Oxides of La0.7Sr0.3Mn0.9X0.1O3 for Solar Fuel Production

Sawaguri

Gokon²,

Hayashi³

et al. 2022

Front. Energy Res.

Self Cite

View full text Add to dashboard Cite

We investigated, herein, the redox activity of partial substitution of the B-site in a series of lanthanum/strontium-manganese-based (LSM) perovskite oxide, La0.7Sr0.3Mn0.9X0.1O3 for solar two-step thermochemical fuel production using concentrated solar radiation as an energy source. We systematically investigated the effects of partial substitution in LaSrMnO3 in terms of their kinetics behavior, oxygen/CO productivity, thermal reduction/oxidation temperatures. Furthermore, repeatability was evaluated and compared among the samples prepared using the same procedure and studied using the same test method. We observed and evaluated the long-term thermal stability of the redox activity and valence variation of the constituting ionic species of the perovskite in the two-step thermochemical CO2 splitting. From the perspectives of superior activity and long-term repeatability, Ni-, Co-, and Mg-substituted LSM perovskites are promising for thermochemical two-step CO2/H2O splitting to produce synthetic gas.

show abstract

Perovskite oxide redox materials for two-step solar thermochemical CO2 splitting

Tran,

Li,

Liu

2024

Chemical Engineering Journal

View full text Add to dashboard Cite

Thermochemical two-step CO2 splitting using La0.7Sr0.3Mn0.9Cr0.1O3 of perovskite oxide for solar fuel production

Cited by 5 publications

References 7 publications

Redox Performance and Optimization of the Chemical Composition of Lanthanum–Strontium–Manganese-Based Perovskite Oxide for Two-Step Thermochemical CO2 Splitting

Redox Performance and Optimization of the Chemical Composition of Lanthanum–Strontium–Manganese-Based Perovskite Oxide for Two-Step Thermochemical CO2 Splitting

Two-Step Thermochemical CO2 Splitting Using Partially-Substituted Perovskite Oxides of La0.7Sr0.3Mn0.9X0.1O3 for Solar Fuel Production

Perovskite oxide redox materials for two-step solar thermochemical CO2 splitting

Contact Info

Product

Resources

About