CH4 conversion into value-added products by catalytic processes assisted by electrochemical reactions in solid oxide cells
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2024
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BRAZIL MRS MEETING, 22nd
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Resumo
Methane (CH4), the major constituent of natural gas and biogas, is an abundant source to
obtain value-added hydrocarbons. The oxidative coupling of methane (OCM) is a direct
catalytic route to convert CH4 towards C2 hydrocarbons (C2H6 and C2H4). The use of
electrochemical devices such as solid oxide fuel cells (SOFC) as a reactor for OCM is
possible, providing synergistic control of electrochemical oxidation/reduction reactions to
energy production with in-situ catalysis [1]. In this context, the use of mixed oxide
La0.5Ce0.5O2-δ (LCO) was studied as an additional catalytic layer on the Ni/YSZ anode of a
SOFC for the operation under CH4 as fuel. The presence of surface oxygen vacancies in
single-phase LCO, which may benefit the OCM reaction, was evidenced by Raman
spectroscopy [2]. The catalytic properties of LCO at 800 ºC were investigated in a fixed-bed
catalytic reactor, resulting in a C2 selectivity and yield of 41% and 8%, respectively. The
modified SOFC with the additional LCO-catalytic layer was fabricated and tested under H2
and CH4 [2]. The electrochemical properties were studied during online gas analysis of the
anode outlet. The experimental data revealed that CH4 conversion and product distribution
are closely related to operational conditions such as reactant concentration, anode feed flow
rate, current output, and operating temperature. In addition to C2, products of internal
methane reforming (CO and H2) were detected in all evaluated conditions. The SOFC
showed stable behavior, maintaining a stable current of 20 mA·cm-2, 10% of CH4 conversion,
and 14% of C2 selectivity throughout 30 h. The combined catalytic and electrochemical
reactions described are considered a promising approach to producing valuable chemicals
and electrical energy.
Como referenciar
VILELA, VANESSA B.; THYSSEN, VIVIAN V.; FLORIO, DANIEL Z. de; FERLAUTO, ANDRE S.; STEIL, MARLU-CESAR; FONSECA, FABIO C. CH4 conversion into value-added products by catalytic processes assisted by electrochemical reactions in solid oxide cells. In: BRAZIL MRS MEETING, 22nd, September 29 - October 3, 2024, Santos, SP. Abstract... São Carlos, SP: Aptor Software, 2024. p. 826-826. Disponível em: https://repositorio.ipen.br/handle/123456789/48933. Acesso em: 24 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.