Review and Outlook of Confined Ni Catalysts for the Dry Reforming of Methane Reaction

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(3), P. 1633 - 1656

Published: Jan. 11, 2024

Dry reforming of methane (DRM) transforms greenhouse gases CH4 and CO2 to syngas H2 CO, which conduces reducing emissions the producing sustainable energy chemicals. Catalysts with confined structures can actively stably catalyze DRM owing their unique properties confinement effect, metal–support interaction, size etc. The significantly contribute resolve problems metal sintering carbon deposition in DRM. This review summarizes latest developments Ni catalysts for recent years. synthetic approaches are first introduced, followed by achievements over Ni@M1Ox (M1Ox = SiO2, Al2O3, ZrO2), Ni@zeolite (zeolite SBA-15, MCM-41, ZSM-5), bimetallic Ni–M2@SiO2 (M2 Cu, In, Co), multifunctional (Ni/M3Ox)@SiO2 (M3Ox CeO2, ZrO2, Mg phyllosilicate). After illustration mono- bifunctional mechanisms, remarks perspectives proposed end. will shed light on fabricating other new reactions.

Language: Английский

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Unraveling the atomic interdiffusion mechanism of NiFe₂O₄ oxygen carriers during chemical looping CO₂ conversion

Carbon Energy, Journal Year: 2024, Volume and Issue: 6(8)

Published: Feb. 27, 2024

Abstract By employing metal oxides as oxygen carriers, chemical looping demonstrates its effectiveness in transferring between reduction and oxidation environments to partially oxidize fuels into syngas convert CO 2 CO. Generally, NiFe O 4 carriers have demonstrated remarkable efficiency conversion. Nevertheless, the intricate process of atomic migration evolution within internal structure bimetallic during continuous high‐temperature redox cycling remains unclear. Consequently, lack a fundamental understanding complex ionic transfer associated with energy conversion processes hampers design high‐performance carriers. Thus, this study, we employed situ characterization techniques theoretical calculations investigate ion behavior structural bulk H /lab air cycles. We discovered that step, lattice rapidly migrates vacancy layers replenish consumed active species, while Ni leaches from material surface. During splitting toward core carrier, forming Fe–Ni alloys. outward, creating hollow owing Kirkendall effect triggered by swift oxygen. The atom paths depend on rates. These discoveries highlight significance regulating release–recovery rate uphold structures reactivity This work offers comprehensive oxidation/reduction‐driven interdiffusion

Language: Английский

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Micro-structure change and crystal-structure modulated of oxygen carriers for chemical looping: Controlling local chemical environment of lattice oxygen

Fuel, Journal Year: 2024, Volume and Issue: 364, P. 131087 - 131087

Published: Feb. 1, 2024

Language: Английский

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Reactivity and stability of different pyrites as sulfur carriers for chemical looping decomposition of H2S into H2 and S

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131792 - 131792

Published: Jan. 1, 2025

Language: Английский

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Carbon Dioxide Capture and Hydrogen Production with a Chemical Looping Concept: A Review on Oxygen Carrier and Reactor

Energy & Fuels, Journal Year: 2023, Volume and Issue: 37(21), P. 16245 - 16266

Published: Oct. 13, 2023

The large amount of greenhouse gases produced by the combustion fossil energy has caused global warming and a series climate problems. In order to reduce gas emissions, captured carbon can be converted into high value-added products, thereby accelerating transformation model from fuels clean energy. Chemical looping technology is considered an efficient potential strategy for converting syngas hydrogen. This work describes chemical combined with CO2 or H2O reforming produce CO H2, respectively, performance analysis such as thermodynamics, kinetics, oxygen transfer capacity, heat balance were carried out identify viable oxides. view importance high-performance, low-cost metal oxides carriers (OCs) in this process, systematically reviews classification OCs their applications. addition, reactors 0.2 kWth–1.0 MWth range currently used are discussed, which demonstrate enable large-scale operation processes. Based on past research progress additional aspects technology, we firmly believe that process offers promising commercial will drive transition neutrality.

Language: Английский

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Sorption-enhanced chemical looping steam reforming coupled with water splitting for syngas and H2 coproduction using waste plastic as fuel

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 152927 - 152927

Published: June 7, 2024

Language: Английский

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Test operation of microwave-assisted chemical looping gasification for water hyacinth with a lean iron ore as oxygen carrier

Biomass and Bioenergy, Journal Year: 2024, Volume and Issue: 183, P. 107141 - 107141

Published: March 16, 2024

Language: Английский

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Synthesis of uniform Fe2O3@Y2O3 yolk−shell nanoreactors as chemical looping oxygen carriers

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 350, P. 123935 - 123935

Published: April 24, 2024

Language: Английский

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Synergetic Polymetallic Activation: Boosting Performance of Calcium Ferrite Oxygen Carriers in Chemical Looping Combustion

Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 29, 2024

Language: Английский

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CO₂ conversion to CO by reverse water gas shift and dry reforming using chemical looping

RSC Sustainability, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Chemical looping technology provides an efficient means of sustainable CO 2 conversion to the important chemical intermediate or syngas by changing conventional co-feeding reactant into alternating feeding. It...

Language: Английский

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