Effects of supports on reduction activity and carbon deposition of iron oxide for methane chemical looping hydrogen generation

Zhu, Min; Chen, Shiyi; Soomro, Ahsanullah; Hu, Jun; Sun, Zhao; Ma, Shenggui; Xiang, Wenguo

doi:10.1016/j.apenergy.2018.05.082

Cited by 50 publications

(23 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the lattice oxygen in the OC is exhausted or the oxygen supply is insufficient due to the limitation of lattice oxygen quantity at the later stage of reaction, the methane will undergo a cracking reaction on the OC surface, resulting in the formation of carbon deposition. Particularly, when the OC is reduced completely, Fe and Co also catalyze the cracking of methane 41 …”

Section: Resultsmentioning

confidence: 99%

Study on the redox performance of Cu and Ce‐doped CoFe ₂ O ₄ as oxygen carriers for chemical looping hydrogen generation

Gao

Jia

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary In the chemical looping hydrogen generation process, CoFe2O4 is regarded as one of the most excellent candidates for oxygen carriers (OCs). In this paper, the synergistic effect of Cu and Ce added to CoFe2O4 was studied. The doping of Cu and Ce improved the reactivity of CoFe2O4 with methane, and also increased the hydrogen yield and purity. The results indicated that the introduction of Cu and Ce facilitated the deep reduction of CoFe2O4, which was ascribed to the enhanced migration capacity of lattice oxygen. In addition, the addition of Cu inhibited the decomposition of CH4 and alleviated carbon deposition. The Cu4Ce4‐CoFe had a suitable Cu/Ce mass ratio, which was more conducive to the formation of excellent synergistic effect to enhance hydrogen production and weaken carbon deposition. The Cu4Ce4‐CoFe exhibited outstanding H2 yield (15.42 mmol·g−1) and H2 purity (99.13%). In addition, the reactivity of OC decreased to some extent with the cyclic experiment when the Cu4Ce4‐CoFe was used, the H2 yield decreased from ∼15.21 to ∼10.86 mmol·g−1 over 10 experimental cycles. In conclusion, Cu and Ce co‐doping is an effective strategy to obtain OCs with preeminent hydrogen production performance and anti‐carbon deposition performance.

show abstract

Section: Resultsmentioning

confidence: 99%

Study on the redox performance of Cu and Ce‐doped CoFe ₂ O ₄ as oxygen carriers for chemical looping hydrogen generation

Gao

Jia

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

show abstract

“…By regulating the mass flows of the oxygen carriers, maintaining the right equilibrium between the conversions in the three reactors, an autothermal process can be obtained, and high purity CO 2 and H 2 streams can be simultaneously obtained by condensation, without costly energy consumption for separation and purification [115]. Considering the high O 2 carrying capacity, good reactivity with H 2 O, and the low cost, Fe-based materials have been identified to be the most preferred oxygen carrier options for the chemical looping for hydrogen generation processes [111,[116][117][118] because they show high reactivity in the water-splitting reaction [40,41,119]. The regeneration by steam in the CLHG process is closely related to the steam-iron process patented by Messerschmitt in 1910 [120].…”

Section: Chemical Looping Hydrogen Generationmentioning

confidence: 99%

Development of Stable Oxygen Carrier Materials for Chemical Looping Processes—A Review

et al. 2020

View full text Add to dashboard Cite

This review aims to give more understanding of the selection and development of oxygen carrier materials for chemical looping. Chemical looping, a rising star in chemical technologies, is capable of low CO2 emissions with applications in the production of energy and chemicals. A key issue in the further development of chemical looping processes and its introduction to the industry is the selection and further development of an appropriate oxygen carrier (OC) material. This solid oxygen carrier material supplies the stoichiometric oxygen needed for the various chemical processes. Its reactivity, cost, toxicity, thermal stability, attrition resistance, and chemical stability are critical selection criteria for developing suitable oxygen carrier materials. To develop oxygen carriers with optimal properties and long-term stability, one must consider the employed reactor configuration and the aim of the chemical looping process, as well as the thermodynamic properties of the active phases, their interaction with the used support material, long-term stability, internal ionic migration, and the advantages and limits of the employed synthesis methods. This review, therefore, aims to give more understanding into all aforementioned aspects to facilitate further research and development of chemical looping technology.

show abstract

“…21 This implies that an ideal support should possess both high Tammann temperature and oxygen conduction. 28,29 In this regard, CeO 2 -based ceramics can be used to support Fe 2 O 3 because of their tunable oxygen vacancy concentration, high oxygen conduction and sintering resistance at high temperatures. For example, Sundmacher et al 30 used Fe 2 O 3 /Ce 0.5 Zr 0.5 O 2 as an oxygen carrier material for a cyclic water gas-shift reaction.…”

Section: Introductionmentioning

confidence: 99%

A La, Sm co-doped CeO₂ support for Fe₂O₃ to promote chemical looping splitting of CO₂ at moderate temperature

Xiong

Zhao

Gao

et al. 2022

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

Effects of supports on reduction activity and carbon deposition of iron oxide for methane chemical looping hydrogen generation

Cited by 50 publications

References 54 publications

Study on the redox performance of Cu and Ce‐doped CoFe ₂ O ₄ as oxygen carriers for chemical looping hydrogen generation

Study on the redox performance of Cu and Ce‐doped CoFe ₂ O ₄ as oxygen carriers for chemical looping hydrogen generation

Development of Stable Oxygen Carrier Materials for Chemical Looping Processes—A Review

A La, Sm co-doped CeO₂ support for Fe₂O₃ to promote chemical looping splitting of CO₂ at moderate temperature

Contact Info

Product

Resources

About

Effects of supports on reduction activity and carbon deposition of iron oxide for methane chemical looping hydrogen generation

Cited by 50 publications

References 54 publications

Study on the redox performance of Cu and Ce‐doped CoFe 2 O 4 as oxygen carriers for chemical looping hydrogen generation

Study on the redox performance of Cu and Ce‐doped CoFe 2 O 4 as oxygen carriers for chemical looping hydrogen generation

Development of Stable Oxygen Carrier Materials for Chemical Looping Processes—A Review

A La, Sm co-doped CeO2 support for Fe2O3 to promote chemical looping splitting of CO2 at moderate temperature

Contact Info

Product

Resources

About

Study on the redox performance of Cu and Ce‐doped CoFe ₂ O ₄ as oxygen carriers for chemical looping hydrogen generation

Study on the redox performance of Cu and Ce‐doped CoFe ₂ O ₄ as oxygen carriers for chemical looping hydrogen generation

A La, Sm co-doped CeO₂ support for Fe₂O₃ to promote chemical looping splitting of CO₂ at moderate temperature