干旱区生态环境知识资源中心(Arid): Evaluation of the feasibility of ethanol steam reforming in a molten carbonate fuel cell

Arid

DOI	10.2172/460262
报告编号	CONF-961107--Absts.
来源ID	OSTI_ID: 460262
	Evaluation of the feasibility of ethanol steam reforming in a molten carbonate fuel cell
	Cavallaro, S. [Universita di Messina (Italy)]; Passalacqua, E.; Maggio, G.; Patti, A.; Freni, S. [Istituto CNR-TAE, Messina (Italy)]
英文摘要	The molten carbonate fuel cells (MCFCs) utilizing traditional fuels represent a suitable technological progress in comparison with pure hydrogen-fed MCFCs. The more investigated fuel for such an application is the methane, which has the advantages of low cost and large availability; besides, several authors demonstrated the feasibility of a methane based MCFC. In particular, the methane steam-reforming allows the conversion of the fuel in hydrogen also inside the cell (internal reforming configuration), utilizing the excess heat to compensate the reaction endothermicity. In this case, however, both the catalyst and the cell materials are subjected to thermal stresses due to the cold spots arising near to the reaction sites MCFC. An alternative, in accordance with the recent proposals of other authors, may be to produce hydrogen from methane by the partial oxidation reaction, rather than by steam reforming. This reaction is exothermic ({Delta}H{degrees}=-19.1 kJ/mol H{sub 2}) and it needs to verify the possibility to obtain an acceptable distribution of the temperature inside the cell. The alcohols and, in particular, methanol shows the gas reformed compositions as a function of the steam/ethanol molar ratio, ranging from 1.0 to 3.5. The hydrogen production enhances with this ratio, but it presents a maximum at S/EtOH of about 2.0. Otherwise, the increase of S/EtOH depresses the production of CO and CH{sub 4}, and ethanol may be a further solution for the hydrogen production inside a MCFC. In this case, also, the reaction in cell is less endothermic compared with the methane steam reforming with the additional advantage of a liquid fuel more easily storable and transportable. Aim of the present work is to perform a comparative evaluation of the different solutions, with particular reference to the use of ethanol.
出版年	1996
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	30 DIRECT ENERGY CONVERSION ; MOLTEN CARBONATE FUEL CELLS ; STEAM REFORMER PROCESSES ; CONFIGURATION ; ETHANOL ; THERMAL STRESSES ; THERMODYNAMICS ; HYDROGEN PRODUCTION ; METHANOL ; TEMPERATURE DISTRIBUTION ; PARTIAL OXIDATION PROCESSES ; METHANE ; COMPARATIVE EVALUATIONS
URL	http://www.osti.gov/scitech/servlets/purl/460262
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/266939
推荐引用方式 GB/T 7714	Cavallaro, S. [Universita di Messina ,Passalacqua, E.,Maggio, G.,et al. Evaluation of the feasibility of ethanol steam reforming in a molten carbonate fuel cell,1996.