H2S poisoning effect and ways to improve sulfur tolerance of nickel cermet anodes operating on carbonaceous fuels

Chen, Huili; Wang, Fen; Wang, Wei; Chen, Daifen; Li, Si‐Dian; Shao, Zongping

doi:10.1016/j.apenergy.2016.07.028

Cited by 61 publications

(18 citation statements)

References 116 publications

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“…In addition to the above‐mentioned transition metals, there are some other candidates for increasing the coking tolerance, the most promising of which is tin (Sn). Tin has been added into SOFC anodes and appears to present both carbon and sulfur tolerance . Farrell and Linic reported that the coke formation on the Ni‐based cermet anode in oxygenated hydrocarbons (e.g., ethanol) can be greatly suppressed by alloying Ni with Sn metal with a small amount .…”

Section: Modified Nickel‐based Cermet Anodessupporting

confidence: 91%

Recent Advances in the Development of Anode Materials for Solid Oxide Fuel Cells Utilizing Liquid Oxygenated Hydrocarbon Fuels: A Mini Review

Wang

Julião

et al. 2018

Energy Tech

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Solid oxide fuel cells (SOFCs) are the most widely used fuel cells due to their excellent fuel flexibility, high efficiency and low emissions. Although the liquid fuels are easier to handle and transport than hydrogen, their direct use in SOFC leads to serious performance deterioration because of the coke formation on the traditional Ni‐based cermet anodes. In this review, the advances in the development of coking resistant anodes and the new liquid fuels such as oxygenated hydrocarbons to solve the problem of coke formation with Ni‐based anodes are summarized. It is concluded that Ni‐based cermets are still the most promising anode materials and some targeted modifications are needed to improve the coking resistance. Several strategies to improve the coking resistance of Ni‐based anodes are highlighted. The aim of this review is to provide some helpful guidance and potential directions for the future design of anodes for SOFCs utilizing liquid oxygenated hydrocarbon fuels directly.

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Section: Modified Nickel‐based Cermet Anodessupporting

confidence: 91%

Recent Advances in the Development of Anode Materials for Solid Oxide Fuel Cells Utilizing Liquid Oxygenated Hydrocarbon Fuels: A Mini Review

Wang

Julião

et al. 2018

Energy Tech

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“…In addition to the modification of surface adsorption properties of Ni, significant sulfur tolerance resistance can be obtained by modifying the ionic oxide support e.g., CeO 2 or the use of other mixed ionic/electronic perovskite materials like BaZr 0.1 Ce0.7Y 0.2−x Yb x O 3-δ (BZCYYb) or BaZr 0.4 Ce 0.4 Y 0.2O3−δ (BZCY), which can be oxygen ion or proton conductors (Wang et al, 2014;Chen et al, 2016). As for the case of carbon tolerance, CeO 2 supporting catalytic systems are characterized by the fast transition between Ce 4+ to Ce 3+ that provides highly mobile O species, which can oxidize adsorbed S species either on Ni or on CeO 2 .…”

Section: Sulfur Tolerance Of the Ni/gdc Niau/gdc And Niaumo/gdcmentioning

confidence: 99%

Effect of Au and/or Mo Doping on the Development of Carbon and Sulfur Tolerant Anodes for SOFCs—A Short Review

Niakolas

Neofytidis

Neophytides

2017

Front. Environ. Sci.

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HIGHLIGHTS• The kinetics of CH 4 steam reforming and partial oxidation are determined by the oxidation rate of CH x adsorbed species • The modification of the Ni/YSZ and Ni/GDC with Au and/or Au-Mo results in differentiated structures of atomically dispersed Au and/or Au-Mo at the surface and the bulk of the Ni particles.• At lean S/C NiAu/YSZ selectively oxidizes electrochemically the catalytically produced H 2 and CO, while NiAu/GDC is selective to the direct partial electrochemical oxidation of CH 4 to CO and H 2.• The modified electrodes show significant tolerance to C formation.• Au-Mo modification enhances the intrinsic sulfur tolerance properties of Ni/GDC.The presented work is a short review of the research attempts from our group with collaborators, during the last 15 years, which had as main objective to study and improve the electrocatalytic performance of Ni-based electrode materials for the CH 4 Internal steam Reforming process (ISR.) in Solid Oxide Fuel Cells (SOFCs). In particular, NiO/YSZ and NiO/GDC anode powders were modified with Au and/or Mo nano-particles via different preparation methods. These efforts resulted in anode materials with high tolerance and improved electrocatalytic activity under both carbon forming and sulfur poisoning conditions. The most important findings are being reviewed and critical findings are being highlighted 50 as to stress the key differences in the electrocatalytic performance between Ni/YSZ and Ni/GDC. The possible effects of Au and/or Mo addition on the physicochemical and strucutral properties of the cermets are thoroughly discussed as well as active functional layers in the form of anode SOFC electrodes.

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“…Modified Ni-SDC. Nickel-samaria doped ceria (Ni-SDC) has been investigated as SOFC anode due to its high power densities, moreover, ceria is a good sulfur sorbent at high temperatures given that it reacts with H 2 S [37,38]. Therefore, this element can soften the undesirable properties of Ni in this application, which has been studied in order to modify Ni-SDC composition and enhance SOFC performance.…”

Section: Anodementioning

confidence: 99%

Novel materials for solid oxide fuel cell technologies: A literature review

Silva

Souza

2017

International Journal of Hydrogen Energy

329

110

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This study aims to review novel materials for solid oxide fuel cell (SOFC) applications covered in literature. Thence, it was found that current SOFC operating conditions lead to issues, such as carbon surface deposition, sulfur poisoning and quick component degradation at high temperatures, which make it unsuitable for a few applications. Therefore, many researches are focused on cell performance enhancement through replacing the materials being used in order to improve properties and/or reduce operating temperatures. Most modifications in the anode aim to avoid some issues concerning conventionally used Ni-based materials, such as carbon deposition and sulfur poisoning, besides enhancing catalytic activity, once this component is directly exposed to the fuel. It was also found literature about the cathode with the aim of developing a material with enhanced properties in a wider temperature range, which has been compared to the currently used one: LSM perovskite (La 1-x Sr x MnO 3). Novel electrolyte materials can have ionic or protonic conductivity, thus performance degradation must be avoided at several operating conditions. In order to enhance its electrochemical performance, different materials for electrodes (cathode and anode) and electrolytes have been assessed herein.

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H2S poisoning effect and ways to improve sulfur tolerance of nickel cermet anodes operating on carbonaceous fuels

Cited by 61 publications

References 116 publications

Recent Advances in the Development of Anode Materials for Solid Oxide Fuel Cells Utilizing Liquid Oxygenated Hydrocarbon Fuels: A Mini Review

Recent Advances in the Development of Anode Materials for Solid Oxide Fuel Cells Utilizing Liquid Oxygenated Hydrocarbon Fuels: A Mini Review

Effect of Au and/or Mo Doping on the Development of Carbon and Sulfur Tolerant Anodes for SOFCs—A Short Review

Novel materials for solid oxide fuel cell technologies: A literature review

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