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Electrochemical study of composite materials for coal-based direct carbon fuel cell
- Source :
- International Journal of Hydrogen Energy. 43:12900-12908
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The efficient conversion of solid carbon fuels into energy by reducing the emission of harmful gases is important for clean environment. In this regards, direct carbon fuel cell (DCFC) is a system that converts solid carbon directly into electrical energy with high thermodynamic efficiency (100%), system efficiency of 80% and half emission of gases compared to conventional coal power plants. This can generate electricity from any carbonaceous fuel such as charcoal, carbon black, carbon fiber, graphite, lignite, bituminous coal and waste materials. In this paper, ternary carbonate-samarium doped ceria (LNK-SDC) electrolyte has been synthesized via co-precipitation technique, while LiNiCuZnFeO (LNCZFO) electrode has been prepared using solid state reaction method. Due to significant ionic conductivity of electrolyte LNK-SDC, it is used in DCFC. Three types of solid carbon (lignite, bituminous, sub-bituminous) are used as fuel to generate power. The X-ray diffraction confirmed the cubic crystalline structure of samarium doped ceria, whereas XRD pattern of LNCZFO showed its composite structure. The proximate and ultimate coal analysis showed that fuel (carbon) with higher carbon content and lower ash content was promising fuel for DCFC. The measured ionic conductivity of LNK-SDC is 0.0998 Scm−1 and electronic conductivity of LNCZFO is 10.1 Scm−1 at 700 °C, respectively. A maximum power density of 58 mWcm−2 is obtained using sub-bituminous fuel.
- Subjects :
- Bituminous coal
Thermal efficiency
Materials science
Renewable Energy, Sustainability and the Environment
business.industry
Direct carbon fuel cell
geology.rock_type
geology
Energy Engineering and Power Technology
02 engineering and technology
Carbon black
Electrolyte
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Electrochemistry
01 natural sciences
0104 chemical sciences
Fuel Technology
Chemical engineering
Coal
Graphite
0210 nano-technology
business
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 43
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi...........7343c44be6ff50e801d2f283859c736a