Research and development on porous components for MCFC applications

Caracterização estrutural, textural e morfológica de aluminato de lítio (LiAlO2) sintetizado por coprecipitação

“…Observa-se um aumento de A BET entre 550 e 750 ºC devido à saída de resíduos de síntese, efeito confirmado pelo aumento do volume de gás adsorvido entre as isotermas (a) [23]. Foram usados três métodos de síntese para obtenção do LiAlO 2 , tais como rota citrato, processo Pechini e um processo, que segundo os autores, é semelhante ao processo citrato, porém com adição do álcool polivinílico [12].…”

A review on MCFC matrix: State-of-the-art, degradation mechanisms and technological improvements

“…Referring to the conventional cell structure, the matrix serves as (i) electron insulation, (ii) gas barrier between the anode and the cathode and (iii) support for the molten electrolytes, which are retained in its porous structure allowing the ion migration inside [ 27 ]. The electrolytes are usually alkaline salts [ 1 ], such as lithium and potassium carbonates, molten at MCFC operating temperatures [ 28 ]. A sufficient capillary force for their uptake and retention inside the matrix is obtained by keeping the pore diameters of the matrix smaller than those of the electrodes [ 26 , 29 ] and by having a good wettability of the electrolyte melt [ 30 ].…”

“…Another important characteristic of the matrix is the particle Specific Surface Area (SSA) that affects greatly the mean pore size and the porosity [ 33 ]. A specific surface area of ∼10 m 2 /g is usually considered for MCFC applications [ 1 , 33 ], however high-performing matrixes can reach up to ∼12 m 2 /g [ 28 ].…”

“…A fuel cell is a power generator reaching a higher efficiency than conventional engines, with lower environmental impacts and fuel demand [ 1 , 2 ]. Molten Carbonate Fuel Cells (MCFCs) are a well-established technology as co-generation units in distributed generation and integrated gasification combined cycle power plants [ [3] , [4] , [5] , [6] , [7] ], using different reformate fuel gases as fuel [ 8 , 9 ].…”