Chemical looping dry reforming of methane with hydrogen generation on Fe2O3/Al2O3 oxygen carrier

Zhu, Min; Song, Ye-Heng; Chen, Shiyi; Li, Meng; Zhang, Lei; Xiang, Wenguo

doi:10.1016/j.cej.2019.02.197

Cited by 71 publications

(16 citation statements)

References 57 publications

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“…It is verified that the Fe 2 O 3 /Al 2 O 3 OCs are feasible for the conversions of CO 2 and CH 4 in the chemical looping process, but the depletion of available lattice oxygen leads to carbon deposition. ,− Fan et al indicate that La x Ce 1– x -Fe 2 O 3 /Al 2 O 3 OC successfully paves a novel way for effectively increasing syngas production and strengthening the CO 2 split . The synergistic La–Ce effect existing in the intimate contact among LaFeO 3 , CeFeO 3 , and CeO 2 is responsible for the enhancement of the lattice oxygen mobility and carbon resistance in the CL-DRM process .…”

Section: Chemical Looping Reforming Of Methanementioning

confidence: 99%

Chemical Looping Conversion of Gaseous and Liquid Fuels for Chemical Production: A Review

Xing-yun

et al. 2020

Energy Fuels

100

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Chemical looping technology enables achievement of the simultaneous feedstock conversion and product separation without additional processes via circulating solid intermediates (so-called oxygen/nitrogen carriers) in a redox process, which contributes to the improvement of product selectivity and energy conservation. In general, methane, CO 2 , N 2 , ethane, propane, ethanol, and glycerol are typical gaseous and liquid fuels for producing syngas, pure H 2 , pure CO, NH 3 , ethylene, and propylene via the chemical looping process. Central to this technology is the solid intermediates that act as reservoirs for storing and releasing O or N in multiple sub-reactions to close the loop. This work comprehensively describes the chemical looping conversion of gaseous or liquid fuels for chemical production, covering chemical looping reforming of methane, chemical looping oxidative coupling of methane, chemical looping reforming of liquid fuels, chemical looping oxidative dehydrogenation, and chemical looping ammonia synthesis technologies. Specifically, this review mainly focuses on the development of oxygen/nitrogen carrier materials, especially the related research in China. The effects of composition, structure, and morphology on the performance and related reaction mechanisms are discussed.

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Section: Chemical Looping Reforming Of Methanementioning

confidence: 99%

Chemical Looping Conversion of Gaseous and Liquid Fuels for Chemical Production: A Review

Xing-yun

et al. 2020

Energy Fuels

100

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“…The lowest methane production was obtained for the gasification run over iron oxide. Indeed, reduced iron oxide has shown high selectivity toward H 2 and CO in dry reforming (Zhu et al, 2019). This last reaction is favored by the relatively high CO 2 concentration obtained with iron oxide.…”

Section: Effect Of Oxidizing Agentmentioning

confidence: 99%

Solar Biomass Gasification Combined With Iron Oxide Reduction for Syngas Production and Green Iron Metallurgy

et al. 2020

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The solar gasification of biomass with iron oxide for combined syngas and iron production was investigated. Both solar energy and biomass are promising renewable energies. The process of gasification converts solid carbonaceous feedstocks into either fuels or chemicals. However, conventional processes require partial combustion of the feedstock for energy supply and inherently suffer from high oxygen production costs and low syngas calorific value due to dilution with combustion products. Chemical looping gasification using solid oxides is an alternative option to tackle these issues. By supplying concentrated solar energy as the high-temperature heat source, it is possible to produce even more syngas from the process while enabling solar energy storage into dispatchable fuels. This work proposes to explore solar biomass gasification over iron oxide at high heating rates, representative of the conditions obtained in solar reactors. Thermodynamic equilibriums of gasification reactions between 100 and 1,500 • C were calculated and experimental results obtained at 1,100 • C with a specially designed induction furnace were reported for biomass gasification with iron oxide, water, or carbon dioxide as oxidizing agents. Solid products analysis showed that iron oxide can be reduced to metallic iron depending on the proportion of the oxygen carrier. These results indicate that iron oxide is an effective material for solar biomass gasification producing both syngas and iron via a novel green metallurgical process.

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“…It consists of a two‐step redox reaction (Figure 1): (1) the reduction step to depriving lattice of oxygen carriers under CO atmosphere with inherent CO 2 capture and (2) the water‐splitting step to regenerate oxygen carriers and produce pure hydrogen. The selection and design of oxygen carriers are essential to ensure the highly efficient and stable production of hydrogen by chemical looping hydrogen water‐gas shift reaction 22 . Many metal oxides have been investigated and used as oxygen carrier materials in chemical looping processes, including CuO, 23 Fe 2 O 3, 24,25 NiO, 26 and Mn 3 O 4.…”

Section: Introductionmentioning

confidence: 99%

“…The selection and design of oxygen carriers are essential to ensure the highly efficient and stable production of hydrogen by chemical looping hydrogen water-gas shift reaction. 22 Many metal oxides have been investigated and used as oxygen carrier materials in chemical looping processes, including CuO, 23 NiO, 26 and Mn 3 O 4. 27 Fe 2 O 3 is superior to its counterparts due to its high oxygen capacity, 28 availability, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect to enhance hydrogen generation of Fe ₂ O ₃ /Ce _0. ₈ Sm ₀ _. ₁ Gd ₀ _.

Xiong

Wang

Jin

et al. 2022

Intl J of Energy Research

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Summary Fe2O3 is recognized as a promising oxygen carrier, but the susceptibility to sintering over the redox cycles limits its application. Although depositing Fe2O3 on CeO2 can simultaneously improve the activity and durability, the formation of CeFeO3 will decrease the oxygen capacity and thus the efficiency of chemical looping water‐gas shift reaction. Doping foreign elements can effectively mitigate the reaction between Fe2O3 and CeO2 and improve redox reactivity. This work employs Gd3+ and Sm3+ as doping elements and investigates the doping effect on hydrogen generation of Fe2O3/CeO2 in water‐gas shift with chemical looping. The characterizations demonstrate that both Gd and Sm are incorporated into the lattice of CeO2 and increase the oxygen defect concentration, which boosts the redox reactivities. In addition, the interaction between the dopants and CeO2 promotes the reduction depth by suppressing the solid reaction between Fe2O3 and CeO2 and improves the reoxidation reaction between reduced oxygen carriers with steam. As a result, Fe2O3/Ce0.8Sm0.1Gd0.1O1.9 shows a high hydrogen yield (8.73 mmol.g−1) and hydrogen production rate (582.2 μmol.g−1.min−1), which is 1.67 times higher than that of Fe2O3/CeO2. The performance remains stable over 40 cycles. The introduction of foreign cations may provide an effective method and significantly impact the oxygen carrier design.

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Chemical looping dry reforming of methane with hydrogen generation on Fe2O3/Al2O3 oxygen carrier

Cited by 71 publications

References 57 publications

Chemical Looping Conversion of Gaseous and Liquid Fuels for Chemical Production: A Review

Chemical Looping Conversion of Gaseous and Liquid Fuels for Chemical Production: A Review

Solar Biomass Gasification Combined With Iron Oxide Reduction for Syngas Production and Green Iron Metallurgy

Synergistic effect to enhance hydrogen generation of Fe ₂ O ₃ /Ce _0. ₈ Sm ₀ _. ₁ Gd ₀ _.

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Chemical looping dry reforming of methane with hydrogen generation on Fe2O3/Al2O3 oxygen carrier

Cited by 71 publications

References 57 publications

Chemical Looping Conversion of Gaseous and Liquid Fuels for Chemical Production: A Review

Chemical Looping Conversion of Gaseous and Liquid Fuels for Chemical Production: A Review

Solar Biomass Gasification Combined With Iron Oxide Reduction for Syngas Production and Green Iron Metallurgy

Synergistic effect to enhance hydrogen generation of Fe 2 O 3 /Ce 0. 8 Sm 0 . 1 Gd 0 .

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Synergistic effect to enhance hydrogen generation of Fe ₂ O ₃ /Ce _0. ₈ Sm ₀ _. ₁ Gd ₀ _.