Computational Discovery of Metal Oxides for Chemical Looping Hydrogen Production

Rojas, Jimmy; Jung, In‐Ho; Majumdar, Arun

doi:10.2139/ssrn.3640826

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among the potential candidates, intriguingly, "nonobvious". The phase diagram thermodynamic database can be used to computationally study the water conversion capability of metal oxides for chemical looping hydrogen generation [155]. In addition to screening for suitable oxygen carriers, the DFT method was used to screen for dopants, thus providing a fuller understanding of the selection of dopants [156,157].…”

Section: Primary Materials Selectionmentioning

confidence: 99%

Chemical looping reforming: process fundamentals and oxygen carriers

et al. 2022

View full text Add to dashboard Cite

Chemical looping reforming (CLR) provides a viable process intensification approach for clean and efficient syngas production from carbonaceous fuel with inherent gas–gas separation. The rational design of metal oxide-based oxygen carriers and the scale-up of associated CLR reactor systems play important roles in CLR process development. This review first introduces the concept and advantages of CLR as well as its historical development. The process fundamentals, including basic schemes, reaction stoichiometry, thermodynamics, kinetics and reactor system design, are reviewed. The integral approach for CLR process development is illustrated, showing that the design and compatibility of oxygen carriers and reactor systems are critical for CLR performance. The reaction principle during the reduction of oxygen carriers is discussed, followed by strategies for improving the redox reactivity and stability. We further review and discuss the latest exciting advances on this subject with the purpose of illustrating factors that govern fundamental mechanisms in the redox reaction chemistry of oxygen carriers and their design principles for sustained chemical looping reactor applications. It is expected that these new advances will inspire more effective oxygen carriers and efficient reactor systems for the development and deployment of various CLR processes.

show abstract

Section: Primary Materials Selectionmentioning

confidence: 99%

Chemical looping reforming: process fundamentals and oxygen carriers

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Hydrogen is considered one of the most prospective energy sources due to its environmental friendliness and high energy density 1,2 . Recently, researchers have explored an efficient, sustainable and clean production method for hydrogen—chemical looping hydrogen generation (CLHG) 3,4 . The oxygen carriers (OCs) were used to transfer oxygen between three reactors, including air reactor (AR), fuel reactor (FR) and steam reactor (SR).…”

Section: Introductionmentioning

confidence: 99%

“…1,2 Recently, researchers have explored an efficient, sustainable and clean production method for hydrogen-chemical looping hydrogen generation (CLHG). 3,4 The oxygen carriers (OCs) were used to transfer oxygen between three reactors, including air reactor (AR), fuel reactor (FR) and steam reactor (SR). The reaction principle is shown in Figure 1.…”

mentioning

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

Computational Discovery of Metal Oxides for Chemical Looping Hydrogen Production

Cited by 2 publications

References 0 publications

Chemical looping reforming: process fundamentals and oxygen carriers

Chemical looping reforming: process fundamentals and oxygen carriers

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

Contact Info

Product

Resources

About

Computational Discovery of Metal Oxides for Chemical Looping Hydrogen Production

Cited by 2 publications

References 0 publications

Chemical looping reforming: process fundamentals and oxygen carriers

Chemical looping reforming: process fundamentals and oxygen carriers

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

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