Screening loaded perovskite oxygen carriers for chemical looping steam methane reforming

Cao, Dingshan; Luo, Cong; Wu, Fan; Zhang, Liqi; Li, Xiaoshan

doi:10.1016/j.jece.2022.107315

Cited by 11 publications

(4 citation statements)

References 57 publications

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“…The chemical looping development process relies heavily on a combination of experimental and computational simulations. In the process of screening suitable oxygen carriers, researchers systematically perform trial-and-error and experimental evaluations on the doping ratios, − carriers, − and preparation methods − of the oxygen carriers to determine the optimal oxygen carriers. Sun et al investigated the effects of different preparation methods as well as doping ratios on the performance of oxygen carriers, and the optimal parameters were determined after tens of combinations of factors were considered.…”

Section: Introductionmentioning

confidence: 99%

Machine Learning for Chemical Looping: Recent Advances and Prospects

Song,

Teng,

Fang

et al. 2024

Energy Fuels

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Section: Introductionmentioning

confidence: 99%

Machine Learning for Chemical Looping: Recent Advances and Prospects

Song,

Teng,

Fang

et al. 2024

Energy Fuels

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“…A small amount of Ce improves H 2 purity and is recommended for superior perovskite performance. 22 Zheng et al 23 reported that the CeO 2 carrier improved the activity of LaFeO 3 for methane oxidation and water splitting. Yuan et al 24 found that Co and Cu dopants in La-based perovskites improved reactivity and resisted methane cracking.…”

Section: Introductionmentioning

confidence: 99%

“…A high concentration of Ce interferes with the production of solid solutions because Ce 3+ is not easily dissolved in crystals. A small amount of Ce improves H 2 purity and is recommended for superior perovskite performance . Zheng et al reported that the CeO 2 carrier improved the activity of LaFeO 3 for methane oxidation and water splitting.…”

Section: Introductionmentioning

confidence: 99%

Chemical Looping-Steam Reforming of Biogas and Methane over Lanthanum-Based Perovskite for Improved Production of Syngas and Hydrogen

Sayyed,

Vaidya

2023

Energy Fuels

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Biogas is a renewable energy resource that can be effectively utilized for hydrogen (H 2 ) generation. Chemical looping-steam reforming (CL-SR) of biogas produces syngas and pure H 2 in a two-stage redox process using an oxygen carrier (OC). The objective of this study was to evaluate the applicability of the lanthanum-based perovskite OC for CL-SR of biogas and methane. La 0.95 Ce 0.05 Ni 0.2 Fe 0.8 O 3 perovskite was used for reforming biogas and methane in a fixed-bed reactor. Several key features of this OC were studied using nitrogen adsorption−desorption (Brunauer−Emmet−Teller method), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The perovskite and porous structure of the OC were evident from the outcome of SEM and XRD techniques. The presence of lattice oxygen was evident in the XPS spectra. The availability of lattice oxygen facilitated partial oxidation of methane and produced optimal syngas and H 2 . In a fixed bed, the material (2 g) was reduced in the 750−850 °C range using methane (flow of 20−40 mL/min). At 850 °C, the syngas ratio (H 2 /CO) was 2.3 mol/mol, while the values of H 2 and CO yields were 67.6 and 49.5%, respectively. Upon reduction with biogas, the yield values improved to 79 (H 2 ) and 62% (CO). The subsequent oxidation step using steam resulted in a H 2 -rich product. The chosen La-based perovskite OC was stable for 20 redox cycles, and the average values of the syngas ratio and yields of H 2 and CO were 1.5, 60, and 52%. The purity of H 2 during the oxidation step over 20 cycles was 95%. Thus, the chosen OC was attractive for the CL-SR process.

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“…It can bring about near-zero energy consumption in in situ separation of products at the same time as hydrogen production or synthesis gas production . It can also realize near-zero energy consumption in in situ separation of products while producing hydrogen, syngas, and other products, , so it is a critical factor of the whole CL system. Therefore, it has obvious advantages: (i) The reaction temperature is much lower than the traditional combustion temperature, which can avoid the formation of thermal NO x .…”

Section: Introductionmentioning

confidence: 99%

Oxygen Storage Characteristics and Redox Behaviors of Lanthanum Perovskite Oxides with Transition Metals in the B-Sites

Jiang

Zhu

et al. 2023

Energy Fuels

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Perovskites are typical oxygen storage materials that find many chemical, energy, and environmental applications. Lanthanumbased perovskite oxides represent a large family of oxygen carriers for chemical looping processes. Oxygen storage and redox behaviors are crucial for efficient activation of C−H/C�O, selective oxidation/ combustion, heat management for chemical looping, or lattice oxygenrelated reactions. The present work studied oxygen releasing/acquiring behaviors of lanthanum-based perovskite oxides with different B-site transition metals (Fe, Co, Ni, Cr, Mn, Al, Cu, and V) in CH 4 /CO/H 2 and CO 2 /O 2 by means of thermodynamic analysis, temperature programmed reduction/oxidation (TPR/TPO) experiments, and kinetics study. The oxygen release capacities obtained from H 2 -TPR followed an order of LaCoO

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Screening loaded perovskite oxygen carriers for chemical looping steam methane reforming

Cited by 11 publications

References 57 publications

Machine Learning for Chemical Looping: Recent Advances and Prospects

Machine Learning for Chemical Looping: Recent Advances and Prospects

Chemical Looping-Steam Reforming of Biogas and Methane over Lanthanum-Based Perovskite for Improved Production of Syngas and Hydrogen

Oxygen Storage Characteristics and Redox Behaviors of Lanthanum Perovskite Oxides with Transition Metals in the B-Sites

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