Thermogravimetric and Electrocatalytic Study of Carbon Deposition of Ag-doped Ni/YSZ Electrodes under Internal CH4 Steam Reforming Conditions
✍ Scribed by I. Gavrielatos; D. Montinaro; A. Orfanidi; S. G. Neophytides
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 412 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1615-6846
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✦ Synopsis
and carbon monoxide can be readily oxidised electrochemically at the three phase boundaries (Ni /YSZ/gas), generating electricity:
In general, when hydrocarbons are exposed to high temperatures their dissociative adsorption on the surface of the nickel based catalyst results in carbon formation and rapid deactivation of the catalyst [7], even when the system operates at steam to carbon ratios that do not favour thermodynamically, the formation of carbon [8]. Carbon can be formed through the thermal cracking of CH 4 (reaction 5) or by the disproportionation of CO (reaction 6): CH 4 →C gr 2H 2
(5) 2CO→C gr CO 2 (6)
Coke formations on nickel surfaces has been the topic of many studies [5,6,. Various approaches to minimise the