Experiments on Vapor Pressure of KCl at Different Molar Fractions in Mixtures of KCl + K2SO4 | Zendy

Xiuhua Li | Zendy; Fang He | Zendy; Frank Behrendt | Zendy; Alba Dieguez-Alonso | Zendy; Haiquan Sun | Zendy; Hailiang Wang | Zendy

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Experiments on Vapor Pressure of KCl at Different Molar Fractions in Mixtures of KCl + K₂SO₄

Author(s) -

Xiuhua Li,

Fang He,

Frank Behrendt,

Alba Dieguez-Alonso,

Haiquan Sun,

Hailiang Wang

Publication year - 2022

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.2c03896

Subject(s) - potassium , chemistry , molar , evaporation , mole fraction , eutectic system , analytical chemistry (journal) , fraction (chemistry) , vapor pressure , molar concentration , potassium sulfate , molar ratio , inorganic chemistry , chromatography , thermodynamics , organic chemistry , catalysis , alloy , medicine , physics , dentistry

The objective of this paper is to measure the vapor pressure of potassium chloride (KCl) in its mixture with potassium sulfate (K 2 SO 4 ). Evaporation behavior of pure salts of KCl, K 2 SO 4 , and their mixtures at different molar fractions were examined using a simultaneous thermogravimetric analyzer (STA) at different temperatures with a pair of crucibles (outer: platinum; inner: alumina). The dependence of the vapor pressure of KCl on its molar fraction in mixtures of KCl + K 2 SO 4 was obtained on the basis of relative pressure. Results show that vapor pressure of KCl is increased to 1.2 times when a small amount of K 2 SO 4 (molar fraction from 0.05 to 0.20) is added. Evaporation of KCl will be inhibited by K 2 SO 4 when the molar fraction of K 2 SO 4 is higher than 0.27, which is its fraction in the eutectic system of KCl + K 2 SO 4 . Vapor pressure of KCl decreases significantly with increasing molar fractions of K 2 SO 4 at its inhibition scope.

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