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Measurements of the Vapor and Dissociation Pressures of Potassium Sulfate and Carbonate at High Temperatures

1972; Oxford University Press; Volume: 45; Issue: 1 Linguagem: Inglês

10.1246/bcsj.45.15

1348-0634

Tetsuo Kosugi,

Ammonia Synthesis and Nitrogen Reduction

Abstract The dissociation reactions of potassium sulfate and potassium carbonate were determined using a quadrupoletype mass spectrometer with a Knudsen-cell-type ion source. The vapor and dissociation pressures of potassium sulfate and the dissociation pressure of potassium carbonate were obtained, by the use of the Knudsen effusion method at temperatures from 900 to 1700°K, as follows: logP=−1.253×104\left(\frac1T\ight)+7.724(K2SO4) logPd=−3.275×104\left(\frac1T\ight)+20.83(K2SO4) logPd=−1.135×104\left(\frac1T\ight)+9.257(K2CO3) The equilibrium constants of the dissociation reaction were estimated from the above data and from those of Kröger and Stratmann: logKp=−6.94×104\left(\frac1T\ight)+38.8(K2SO4) logKp=−1.38×104\left(\frac1T\ight)+9.80(K2CO3)