Acceleration effect of ternary carbonate on CO2 absorption rate in lithiumzirconate powder

Acceleration effect of the ternary carbonate of Li/Na/K on the CO2-absorpti on rate of lithium zirconate was studied. Potassium carbonate additive in l ithium zirconate powder clearly produces the absorption-rate acceleration a s 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 l ithium zirconate powder with the ternary carbonate of Li/Na/K (ternary-type lithium zirconate) shows a more accelerated absorption rate at 500 degrees C, and particularly at 450 degreesC, than does the powder with the binary c arbonate of Li/K (binary-type lithium zirconate). At 500 degreesC, the reac tion-yield range Of CO2 absorption by a ternary-type lithium zirconate, whi ch 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 degrees C, this ternary type has the range of the complete melting, which is as lon g as that by the binary-ty; pe at 500 degreesC, whereas the binary-type doe s not have the range. The difference of the acceleration effect between the ternary and the binary carbonate was attributed to the difference of the l ength of this reaction-yield range.