Effect of H2S and HCl contaminants on nickel and ceria pattern anode solid oxide fuel cells

Tabish, Asif Nadeem; Patel, H.C.; Mani, A.; Schoonman, J.; Aravind, P.V.

doi:10.1016/j.electacta.2022.140592

Cited by 6 publications

(5 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…natural gas or off-gases from power-plants. In the form of H 2 S, sulfur at low concentrations is known to adsorb reversibly on nickel (11) as well as partly on ceria (12) and block active sites for electrochemical and chemical reactions, while leaving bulk processes like charge transport inside the electrode unaffected. Thus, low concentrations of H 2 S added to the fuel can help localize the frequency range of a surface process within the impedance response.…”

Section: Influence Of Sulfur Poisoningmentioning

confidence: 99%

Characterization of a Nickel / Gadolinia Doped Ceria Fuel Electrode for Co-Electrolysis

Esau,

Grosselindemann,

Sckuhr

et al. 2023

ECS Trans.

View full text Add to dashboard Cite

Modelling of the co-electrolysis process requires understanding of the underlying reaction pathways. These include the electrochemical steam reduction, the electrochemical CO2 reduction and their coupling via the catalytic (reverse-)water-gas-shift reaction (RWGS). The assumption of a very fast water-gas-shift reaction and therefore neglectable CO2 electro-reduction is commonly used to model the co-electrolysis process. In contrast to that, it was proposed from previous studies, that the electrochemical conversion of CO / CO2 can be present under H2 / H2O / CO / CO2 gas mixtures on Ni/GDC fuel electrodes. We present results from a complex variation of operating parameters for process identification by the use of electrochemical impedance spectroscopy and the subsequent impedance analysis by the distribution of relaxation times (DRT). Four peaks are identified, including one yet undocumented suspected gas diffusion process. A possible influence of the electrochemical conversion of CO/CO2 starting from pCO2 / pH2O > 1 is shown.

show abstract

Section: Influence Of Sulfur Poisoningmentioning

confidence: 99%

Characterization of a Nickel / Gadolinia Doped Ceria Fuel Electrode for Co-Electrolysis

Esau,

Grosselindemann,

Sckuhr

et al. 2023

ECS Trans.

View full text Add to dashboard Cite

show abstract

“…The development of nickel-based anodes that are active for hydrocarbon reforming but are more resistant to carbon deposition is the subject of a significant amount of research that is being conducted at this time. The insertion of minute quantities of dopants such as gold, molybdenum, and copper into the nickel anode and the addition of ceria to nickel/zirconia cermet are two methods that have been proposed as potential solutions 40 .Another issue with anode direct reformation According to reports, it can cause anode sintering, which lowers the anode's catalytic activity and decreases cell efficiency. Steam is the most common oxidant that is used in the process of reforming hydrocarbon fuel.…”

Section: Fuel For Solid Oxide Cellsmentioning

confidence: 99%

A Review on catalytic Performance for Solid Oxide Cell Components

Khazaal,

2Duha Mohammed Murtadha,

Zahra Khudair Abbas

et al. 2023

J. K. Chem. Sci.

View full text Add to dashboard Cite

Despite being unquestionable around 170 years ago and promising substantial ecological benefits and huge electrical capacity, fuel cells have just presented a serious potential for being commercially practicable. The solid oxide fuel cell has excellent potential and is currently an active research subject. The solid oxide cell might be apparatus composed entirely of solids that operate at very high temperatures, in contrast to other fuel cells. The challenges in developing a high-temperature solid-state fuel cell are discussed in this paper, as are the inorganic materials now employed and under checkup for such cells, as well as the challenges connected with running solid oxide cells on practical hydrocarbon fuels.

show abstract

“…The gas diffusion process in the porous electrode and the complex microstructure may disturb the identification of the H 2 S poisoning effect [13]. Some studies have applied patterned anode cells to avoid the influences of electrode microstructures [15][16][17]. However, few of these studies have focused on the effect of H 2 S concentration on Ni-patterned electrodes.…”

Section: Introductionmentioning

confidence: 99%

Studying the Sulfur Poisoning Mechanism of Solid Oxide Fuel Cells by Means of Patterned Nickel/Yttrium-Stabilized Zirconia Electrodes

Li¹,

Wang²,

Wang³

et al. 2023

ECS Trans.

View full text Add to dashboard Cite

Sulfur causes Ni-based ceramic anode poisoning and thus shortens the life of the cell. Therefore, it is important to clarify the mechanism of sulfur poisoning to improve cell performance and lifetime. However, there is still some controversy about the mechanism of sulfur poisoning. In this work, Ni-patterned electrodes were used to investigate the mechanism of sulfur poisoning under different H2S concentrations and current densities. The electrochemical performance decreased with the H2S concentration increasing from 0 to 5 ppm due to the decrease of H2 reaction active sites. When further increasing the H2S concentration to 50 ppm, the performance showed a different trend and recovered to the initial performance without H2S due to the electrochemical oxidation of H2S. Increasing the current density was found to alleviate sulfur poisoning to some extent. The patterned electrode demonstrated a useful tool for the study of H2S poisoning mechanism.

show abstract

Effect of H2S and HCl contaminants on nickel and ceria pattern anode solid oxide fuel cells

Cited by 6 publications

References 70 publications

Characterization of a Nickel / Gadolinia Doped Ceria Fuel Electrode for Co-Electrolysis

Characterization of a Nickel / Gadolinia Doped Ceria Fuel Electrode for Co-Electrolysis

A Review on catalytic Performance for Solid Oxide Cell Components

Studying the Sulfur Poisoning Mechanism of Solid Oxide Fuel Cells by Means of Patterned Nickel/Yttrium-Stabilized Zirconia Electrodes

Contact Info

Product

Resources

About