Method for improving performance of direct carbon fuel cell of solid oxide
A solid oxide and fuel cell technology, applied in fuel cells, fuel cell additives, circuits, etc., can solve the problems of slow anode reaction rate, affecting battery performance and practical application, and low current density, so as to improve battery current density , improve battery performance, increase the effect of reactivity
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Embodiment 1
[0021] Alkali metal salt K 2 CO 3 As catalyst precursor, carbon black is used as solid carbon fuel, and K catalyst is added to carbon black by impregnation method, and the amount of catalyst added is calculated based on the mass ratio of K atoms to carbon black of 10%. will be added with K 2 CO 3 The carbon black used as fuel is placed in the anode cavity of the direct carbon fuel cell, and the -1 Flow of CO 2 As anode carrier gas, at 100ml min -1 Flow of O 2 As a cathode oxidant, the battery operating temperature is 750°C. At this time, the average power density of SO-DCFC is 1477W·m under the condition of 0.7V constant voltage discharge -2 , the CO mole fraction in the outlet anode carrier gas is 19.8%. At this time, at 750 ° C, carbon black is added with K 2 CO 3 The final battery performance is equivalent to that of carbon black without catalyst added at 950°C.
Embodiment 2
[0023] Alkaline earth metal salt Ca(NO 3 ) 2 4H 2 O was used as catalyst precursor, coke was used as solid carbon fuel, and Ca catalyst was added to coke by impregnation method. will be added with Ca(NO 3 ) 2 The coke is placed in the anode cavity of the direct carbon fuel cell as a fuel, with 50ml·min -1 Flow of CO 2 As anode carrier gas, at 100ml min -1 Flow of O 2 As a cathode oxidant, the battery operating temperature is 750°C. At this time, the average power density of SO-DCFC is 1034W·m under the condition of 0.7V constant voltage discharge -2 , the CO mole fraction in the outlet anode carrier gas is 9.21%. At this time, at 750 °C, the coke was added with Ca(NO 3 ) 2 The final battery performance is equivalent to that of carbon black without catalyst added at 880°C.
Embodiment 3
[0025] With transition metal salt Ni(NO 3 ) 2 ·6H 2 O was used as catalyst precursor, graphite was used as solid carbon fuel, and Ni catalyst was added to graphite by impregnation method. The amount of catalyst added was calculated based on the mass ratio of Ni atoms to graphite at 10%. will be added with Ni(NO 3 ) 2 Graphite is placed in the anode cavity of the direct carbon fuel cell as fuel, and the -1 Flow of CO 2 As anode carrier gas, at 100ml min -1 Flow of O 2 As a cathode oxidant, the battery operating temperature is 750°C. At this time, the average power density of SO-DCFC is 1123W·m under the condition of 0.7V constant voltage discharge -2 , the CO mole fraction in the outlet anode carrier gas is 11.4%. At this time, graphite added Ni(NO 3 ) 2 The final battery performance is equivalent to that of carbon black without catalyst added at 900°C.
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