Acceleration effect of ternary carbonate on CO2 absorption rate in lithium zirconate powder

Acceleration effect of the ternary carbonate of Li/Na/K on the CO2-absorption rate of lithium zirconate was studied. Potassium carbonate additive in lithium zirconate powder clearly produces the absorption-rate acceleration as a result of the formation of the binary carbonate of Li/K, which melts at around 500 degreesC. The experimental results obtained revealed that the lithium zirconate powder with the ternary carbonate of Li/Na/K (ternary-type lithium zirconate) shows a more accelerated absorption rate at 500 degreesC, and particularly at 450 degreesC, than does the powder with the binary carbonate of Li/K (binary-type lithium zirconate). At 500 degreesC, the reaction-yield range Of CO2 absorption by a ternary-type lithium zirconate, which shows complete melting of the carbonate formed during the reaction, is 2.3 times as long as that by a binary-type. Furthermore, even at 450 degreesC, this ternary type has the range of the complete melting, which is as long as that by the binary-ty; pe at 500 degreesC, whereas the binary-type does not have the range. The difference of the acceleration effect between the ternary and the binary carbonate was attributed to the difference of the length of this reaction-yield range.