Electrochemical conversion of methane to ethylene, olefins, and paraffins using metal-supported solid oxide cells

Hu, Boxun; Rosner, Fabian; Breunig, Hanna; Sarycheva, Asia; Kostecki, Robert; Tucker, Michael C.

doi:10.1016/j.ijhydene.2023.05.114

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…MS-SOCs with SFM catalyst (Sr2Fe1.5Mo0.5O6−δ) show promise for electrochemical oxidative coupling of methane (E-OCM). At low cell voltage, a significant current density of oxygen ions is transported across the membrane and facilitates the OCM reaction, leading to synthesis of ethane and ethylene, Fig 5 . A detailed study will be published elsewhere (26).…”

Section: Oxidative Coupling Of Methanementioning

confidence: 99%

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Tucker¹,

Hu²,

Zhu³

et al. 2023

ECS Trans.

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The LBNL metal-supported solid oxide cell architecture contains zirconia electrolyte and porous backbones co-sintered between porous stainless steel supports. Advantages of this design include low-cost structural materials, mechanical ruggedness, excellent tolerance to redox cycling, and extremely fast start-up capability. These features enable a wide variety of applications including electrolysis for intermittent renewables, distributed power generation, and synthesis of valuable chemicals. Highlights from efforts in these areas are presented.

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Section: Oxidative Coupling Of Methanementioning

confidence: 99%

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Tucker¹,

Hu²,

Zhu³

et al. 2023

ECS Trans.

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“…Both methane and carbon dioxide pose increased chemical stability challenges due to the highly reducing and carbon-rich environments at the anode that degrade many catalyst systems. Direct electrochemical oxidative coupling of methane (E-OCM) to commodity chemicals such as ethylene and other olefins is recently gaining attention as the reaction kinetics can be controlled by an applied bias potential. − Potential electrochemical reactions associated with E-OCM are given in the Supporting Information (eqs S1–S6). Sr 2 Fe 1.5 Mo 0.5 O 6−δ (SFMO) was recently reported for E-OCM with an excellent methane-to-ethylene conversion ratio of up to 81.2% .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Oxidative Coupling of Methane: Deciphering the Exceptional Properties of BaMg_0.33Nb_0.67–xFe_xO_3−δ for Enhanced Electrocatalysis and Durable Operation

Denoyer,

Benavidez,

Brearley

et al. 2024

Energy Fuels

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Perovskite metal oxides of the form A(B x M 1−x )O 3−δ are of interest to the electrocatalysis and heterogeneous communities due to their tunable electrical and catalytic properties. However, they suffer poor chemical stability under highly reducing and coke-forming conditions. Doped barium niobates show remarkable chemical stability during electrochemical oxidative coupling of methane (E-OCM) measurements. The reason for their chemical stability is not well understood. We i n v e s t i g a t e d t h e h i g h -t e m p e r a t u r e r e d u c t i v e s t a b i l i t y o f BaMg 0.33 Nb 0.67−x Fe x O 3−δ (BMNF), using a variety of methods. BMNF perovskites were exposed to methane-rich conditions in an E-OCM setup and in temperature-programmed reaction (TPR) measurements. X-ray powder diffraction, scanning transmission electron microscopy, and X-ray photoelectron spectroscopy measurements on BMNF before and after methane exposure reveal that BMNF perovskites retain their crystal structure. Iron doping may increase their electronic conductivity, while changes in Nb 4+/5+ oxidation states provide chemical stability in reducing environments. For comparison, Fe nanoparticles supported on BMN perovskites (BMN-01Fe) were synthesized/analyzed. The lattice-doped Fe in BMNF did not show any exsolution while the surface-bound Fe in BMN-01Fe agglomerated to form nanoparticles under reducing conditions. Our research demonstrates that multivalence, transition metal oxide perovskite redox stability results from several complex factors and is not easily predicted from the behavior of the binary oxides.

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Electrochemical conversion of methane to ethylene, olefins, and paraffins using metal-supported solid oxide cells

Cited by 2 publications

References 37 publications

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Electrochemical Oxidative Coupling of Methane: Deciphering the Exceptional Properties of BaMg_0.33Nb_0.67–xFe_xO_3−δ for Enhanced Electrocatalysis and Durable Operation

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Electrochemical conversion of methane to ethylene, olefins, and paraffins using metal-supported solid oxide cells

Cited by 2 publications

References 37 publications

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Metal-Supported Solid Oxide Cells for Energy Conversion, Electrolysis, and Chemical Synthesis

Electrochemical Oxidative Coupling of Methane: Deciphering the Exceptional Properties of BaMg0.33Nb0.67–xFexO3−δ for Enhanced Electrocatalysis and Durable Operation

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Electrochemical Oxidative Coupling of Methane: Deciphering the Exceptional Properties of BaMg_0.33Nb_0.67–xFe_xO_3−δ for Enhanced Electrocatalysis and Durable Operation