Production of hydrogen and syngas using chemical looping technology via cerium-iron mixed oxides

Hosseini, Seyyed Yaghoob; Khosravi‐Nikou, Mohammad Reza; Shariati, Ahmad

doi:10.1016/j.cep.2019.03.018

Cited by 29 publications

(13 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average particle size and particle size distribution of the three oxygen carriers are presented in Tab are observed at 420, 590, and 710°C. This can be attributed to the fact that the addition of Ce and Zr to Ni-ferrite enhances the reduction reactivity and promotes the reducibility of Ni-ferrite which is consistent with other reports in this field [19,22]. Therefore, the reaction temperature is lower than with Ni-ferrite alone.…”

Section: Fe-semsupporting

confidence: 89%

See 1 more Smart Citation

Chemical Looping Steam Methane Reforming via Ni‐ferrite Supported on Cerium and Zirconium Oxides

2020

Self Cite

View full text Add to dashboard Cite

Pure hydrogen was produced by means of chemical looping steam methane reforming with novel oxygen carriers. Ni‐ferrite, Ni‐ferrite‐ZrO2, and Ni‐ferrite‐CeO2 were synthesized as oxygen carriers and characterized by X‐ray diffraction (XRD), Brunauer‐Emmett‐Teller (BET) method, scanning electron microscopy (SEM), dynamic light scattering (DLS), and hydrogen temperature‐programmed reduction (H2‐TPR). The performances of the as‐synthesized oxygen carriers in the cyclic oxidation‐reduction were investigated in the packed‐bed microreactor at a defined temperature range and under atmospheric pressure. Ni0.39Fe2.61O4‐ZrO2 exhibited the best performance and maximum methane conversion among the other oxygen carriers. In addition, high selectivities for H2 and CO were reached.

show abstract

Section: Fe-semsupporting

confidence: 89%

“…Hosseini et al [19] employed CeO 2 -Fe 2 O 3 with various Fe/Ce ratios. Their tests were carried out in a fixed-bed microreactor in the temperature range of 700-900°C.…”

Section: Introductionmentioning

confidence: 99%

Chemical Looping Steam Methane Reforming via Ni‐ferrite Supported on Cerium and Zirconium Oxides

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The addition of iron ions through the wet impregnation method and the subsequent calcination of iron-ceria composites could be considered responsible for the decrease of ceria crystallite size. In a similar manner, the high dispersibility of the iron-ceria mixed oxides and/or the formation of solid solutions have been considered as contributing factors to this decrease in ceria crystallite size [53][54][55][56][57].…”

Section: Textural and Structural Characteristics (Bet/xrd)mentioning

confidence: 99%

“…formation of solid solutions have been considered as contributing factors to this decrease in ceria crystallite size [53][54][55][56][57].…”

Section: Textural and Structural Characteristics (Bet/xrd)mentioning

confidence: 99%

Facet-Dependent Reactivity of Fe2O3/CeO2 Nanocomposites: Effect of Ceria Morphology on CO Oxidation

et al. 2019

View full text Add to dashboard Cite

Ceria has been widely studied either as catalyst itself or support of various active phases in many catalytic reactions, due to its unique redox and surface properties in conjunction to its lower cost, compared to noble metal-based catalytic systems. The rational design of catalytic materials, through appropriate tailoring of the particles’ shape and size, in order to acquire highly efficient nanocatalysts, is of major significance. Iron is considered to be one of the cheapest transition metals while its interaction with ceria support and their shape-dependent catalytic activity has not been fully investigated. In this work, we report on ceria nanostructures morphological effects (cubes, polyhedra, rods) on the textural, structural, surface, redox properties and, consequently, on the CO oxidation performance of the iron-ceria mixed oxides (Fe2O3/CeO2). A full characterization study involving N2 adsorption at –196 °C, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), temperature programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS) was performed. The results clearly revealed the key role of support morphology on the physicochemical properties and the catalytic behavior of the iron-ceria binary system, with the rod-shaped sample exhibiting the highest catalytic performance, both in terms of conversion and specific activity, due to its improved reducibility and oxygen mobility, along with its abundance in Fe2+ species.

show abstract

“…Cerium oxide nanoparticles (CeO 2 ) has demonstrated activity in photo‐degradation of organic pollutants, photocatalytic water decomposition to produce hydrogen and photocatalytic water oxidation . Eventually, CeO 2 ‐based catalysis in various processes is connected with the nature of the flexible transition between the Ce 3+ and Ce 4+ oxidation states accompany with creation of defect sites .…”

Section: Introductionmentioning

confidence: 99%

Enzyme‐Like Catalytic Activity of Porphyrin‐Functionalized Ceria Nanotubes for Water Oxidation

Meng

Chen

et al. 2019

ChemPlusChem

View full text Add to dashboard Cite

Artificial enzymes have broad applications in catalysis and can be used to help understand catalytic mechanisms. Nanoceria has various enzyme‐mimetic properties that depend on the relative content of Ce3+ and Ce4+. In this context, CeO2 nanotubes was investigated as catalase mimics for water oxidation. The photosensitizer 5,10,15,20‐meso‐tetra(4‐carboxyphenyl) porphyrin (TCPP) was facilely embedded in CeO2 nanotubes (TCPP@CeO2 NTs), and photoinduced charge transfer was shown to occur between the strongly coupled TCPP and CeO2, which leads to effective charge separation and charge redistribution within the hybrids. As a consequence, formation of H2O2, a competing process in water oxidation and a key factor that affects the oxidative stability of photoelectrodes, was effectively inhibited on TCPP@CeO2 NTs. These findings show that enzyme mimics can be used for the selective generation of reactive oxygen species, and therefore to control the kinetics of water oxidation.

show abstract

Production of hydrogen and syngas using chemical looping technology via cerium-iron mixed oxides

Cited by 29 publications

References 72 publications

Chemical Looping Steam Methane Reforming via Ni‐ferrite Supported on Cerium and Zirconium Oxides

Chemical Looping Steam Methane Reforming via Ni‐ferrite Supported on Cerium and Zirconium Oxides

Facet-Dependent Reactivity of Fe2O3/CeO2 Nanocomposites: Effect of Ceria Morphology on CO Oxidation

Enzyme‐Like Catalytic Activity of Porphyrin‐Functionalized Ceria Nanotubes for Water Oxidation

Contact Info

Product

Resources

About