In situ Raman and optical characterization of H2S reaction with Ni-based anodes for SOFCs

被引：18

作者：

Hai Ha Mai Thi ^{[1
,2
]}

Saubat, Bernadette ^{[1
,2
]}

Sergent, Nicolas ^{[1
]}

Pagnier, Thierry ^{[1
,2
]}

机构：

[1] Univ Grenoble Alpes, LEPMI, F-38000 Grenoble, France

[2] MRS, LEPMI, F-38000 Grenoble, France

来源：

SOLID STATE IONICS | 2015年 / 272卷

关键词：

Nickel; SOFC anode; Poisoning; Hydrogen sulfide; In situ Raman spectroscopy; Optical microscopy; OXIDE FUEL-CELLS; COAL SYNGAS; SULFUR; SPECTROSCOPY; YSZ; TEMPERATURE; DEGRADATION; PERFORMANCE; RANGE; TESTS;

D O I：

10.1016/j.ssi.2015.01.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, we re-assess the use of Raman spectroscopy as an in situ method to monitor the sulfidation of SOFC (solid oxide fuel cell) anode-based materials. The technique allows studying in situ kinetics of the sulfidation of nickel at low temperature (up to 500 degrees C). A severe poisoning happens at 500 degrees C with a layer of Ni3S2 covering the entire pellet surface. At higher temperatures, optical microscopy helps to observe in situ the formation and growth of nickel sulfide crystals for the first time. The crystals' growths observed in situ strongly suggest the diffusion of nickel toward sulfide species. A reaction between H2S and CGO was clearly observed at 750-790 degrees C. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：84 / 90

页数：7

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