Equilibrium vaporization rates and vapor pressures of solid and liquid sodium chloride, potassium chloride, potassium bromide, cesium iodide, and lithium fluoride

Abstract

Equilibrium vaporization rates of solid and liquid NaCl, KC1, KBr, Csl, and LiF have been measured, using Knudsen cells, with orifice flows in the molecular, hydrodynamic, and transitional regions. Observed rates in the latter two regions are always greater than those predicted by the Hertz-Knudsen theory for molecular flow. Methods for calculating equilibrium vapor pressures from rates in the transitional and hydrodynamic regions have been developed, and vapor pressures calculated in this way agree well with those derived from standard thermodynamic procedures. The ratio, actual flow/(hypothetical) Knudsen flow, in the transition regime depends only on the mean free path and is independent of the diameter of the orifice.

Simultaneous mapping of SO2, SO, NaCl in Io’s atmosphere with the Submillimeter Array

“…Since SO is not stable in solid phase, and NaCl ice cannot maintain any significant sublimation column (Ewing and Stern, 1974), hydrostatic models mimicking sublimation-driven atmospheres are not physically meaningful for these species. We will then focus on the possible role of direct volcanic input (for both species) and SO 2 photodissociation (in the case of SO).…”

Oxidative coupling of methane over Mn–Na2WO4/SiO2 catalyst with continuous supply of alkali chloride vapor

“…Over the course of the reaction (2-29 h), the yield of ethylene remained constant at 13-14%, which was higher than that for the reaction in the absence of NaCl (0.1% ethylene yield, 2% methane conversion). This indicates that ethylene formation is promoted by NaCl even at 973 K, despite the vapor pressure of NaCl being lower at 973 K (4.4 Pa) than at 1023 K (16 Pa) [23]. Fig.…”

“…Based on the vapor pressure of NaCl at 1023 K (16 Pa [23]), for the reaction represented in Fig. 2a, the NaCl feed to the catalyst bed was lower than 1/120 of the amount of methane transformed to C 2+ hydrocarbons.…”

The Effect of NaCl ( g ) on the Oxidation of NiAl

“…6 Si] coating that is at least 2-4 times more resistant to atmospheric corrosion than zinc coatings of equivalent thickness has been developed for steel sheet by Bethlehem Steel Corporation (7). 6 Si] coating that is at least 2-4 times more resistant to atmospheric corrosion than zinc coatings of equivalent thickness has been developed for steel sheet by Bethlehem Steel Corporation (7).…”

“…The high vapor pressure of NaC1, e.g., 0.35 Torr at 800~ would be expected to lead to its rapid removal (7). The composition of the salt entering the burner will be dependent upon the compressor location from which it was shed.…”