The Efficiencies of Internal Reforming Molten Carbonate Fuel Cell Fueled by Natural Gas and Synthetic Natural Gas From Coal
| Autor: | Hee Chun Lim, Won-Shik Park, Hai-Kyung Seo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Substitute natural gas
Materials science Waste management Renewable Energy Sustainability and the Environment business.industry Mechanical Engineering 0211 other engineering and technologies food and beverages Energy Engineering and Power Technology 02 engineering and technology complex mixtures Electronic Optical and Magnetic Materials Steam reforming 020401 chemical engineering Synthetic fuel Fuel gas Mechanics of Materials Natural gas Molten carbonate fuel cell Coal gasification 021108 energy 0204 chemical engineering business Syngas |
| Zdroj: | Journal of Electrochemical Energy Conversion and Storage. 13 |
| ISSN: | 2381-6910 2381-6872 |
| DOI: | 10.1115/1.4033255 |
| Popis: | When synthetic natural gas (SNG) is produced from coal and used as a fuel in the internal reforming molten carbonate fuel cell (ir-MCFC), electric efficiency can be no greater than 31%. This is because there are several exothermic reactions in the processes of converting coal to SNG, so that a maximum 64% of coal's energy is converted into SNG energy. This results in a lower efficiency than when the ir-MCFC with the electric efficiency of 48% is fueled by natural gas (NG). To increase electric efficiency with SNG, it is necessary to recover the exothermic heat generated from the processes of converting coal to SNG as steam, which can then be used in a steam turbine. When steam produced in the gasification, water gas shift (WGS), and methanation processes is used in a steam turbine, the gross electric efficiency will become 41%. If the steam and auxiliary power for CO2 capture process is consumed more, the net efficiency will be 27%. Use of additional steam from the exhausted gas of fuel cell can increase the total net efficiency to 49%. |
| Databáze: | OpenAIRE |
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