Solubilities of Sulfuryl Fluoride in 2-Butoxyethyl Acetate, 3-Methoxybutyl Acetate, 2-Methoxyethyl Acetate, 1-Methoxy-2-propyl Acetate, and 2-(2-Ethoxyethoxy)ethyl Acetate

Abstract

A large amount of sulfuryl fluoride (SO2F2) is released into the atmosphere after fumigation, intensifying the greenhouse effect. Therefore, it is important to remove SO2F2 generated in fumigation. In this study, the solubilities of SO2F2 in 2-butoxyethyl acetate (BOEA), 3-methoxybutyl acetate (MOBA), 2-methoxyethyl acetate (MOEA), 1-methoxy-2-propyl acetate (MOPA), and 2-(2-ethoxyethoxy)­ethyl acetate (DEOEA) were determined at T = (293.15 to 323.15) K and pressures up to about 600 kPa using the isochoric saturation method. Results showed that SO2F2 solubility in the five acetate derivatives increased with increasing pressure and decreased with increasing temperature. The dissolution of SO2F2 in these solvents belonged to a physical process. Furthermore, the Henry’s law constants and thermodynamic properties including standard Gibbs free energy, enthalpy, and entropy changes of SO2F2 dissolution were further obtained. Compared with water, these five selected acetate derivatives showed potential application for SO2F2 removal. Moreover, the solubilities of SO2F2 in these solvents followed the order of MOBA > MOPA > BOEA > DEOEA > MOEA.

Sulfuryl Fluoride Absorption from Fumigation Exhaust Gas by Biobased Solvents: Thermodynamic and Quantum Chemical Analysis

“…Thus, Hx for each system studied was derived from linear slope by fitting the equilibrium pressure with a mole fraction of SO 2 F 2 . These Henry’s law constants are given in Table and compared with those in other physical solvents reported in the literature. ,, As shown in Table , similar to other physical solvents in the literature, Henry’s law constants in selected biobased solvents were also much smaller than those in water (the Henry’s law constant of SO 2 F 2 in biobased solvent ranges from 1.81 to 18.17 MPa), which meant that the solubilities of SO 2 F 2 in the selected biobased solvents were significantly higher than that in water. Moreover, SO 2 F 2 solubility in these studied biobased solvents followed the order of bis­(2-ethylhexyl) azelate > dibutyl succinate > methyl laurate > diethyl succinate > butyl levulinate > ethyl levulinate > gamma-valerolactone > gamma-butyrolactone.…”

“…The isochoric saturation method was employed to investigate the SO 2 F 2 absorption in biobased solvents. − The apparatus in Figure used for measuring absorption is the same as that in our previous work. , The entire device consists of two 316L stainless steel chambers whose volumes are 364.40 cm 3 ( V GC ) and 153.51 cm 3 ( V CE ). The larger chamber, used as gas reservoir, isolates SO 2 F 2 before it comes into contact with the biobased solvents in the smaller chamber.…”

“…The key point is the choice of a suitable absorbent with such qualities as low vapor pressure, low viscosity, stable chemical and thermal properties, and no corrosion. Based on the similar structural characteristics of the SO 2 F 2 molecule to acid gas due to its central atom lacking electrons, some physical absorbents have been preliminarily investigated to capture SO 2 F 2 , , such as propylene carbonate, N -methylpyrrolidinone, tributyl phosphate, 2-butoxyethyl acetate, 3-methoxybutyl acetate, 2-methoxyethyl acetate, 1-methoxy-2-propyl acetate, and 2-(2-ethoxyethoxy)­ethyl acetate. Most of the above solvents show excellent performance on SO 2 F 2 capture.…”

Tellurene Nanoflake-Based Gas Sensors for the Detection of Decomposition Products of SF6

“…During operation, SF 6 inevitably decomposes into stable gas molecules including hydrogen sulfide (H 2 S), sulfur dioxide (SO 2 ), thionyl fluoride (SOF 2 ), and sulfuryl fluoride (SO 2 F 2 ) because of partial discharge . As a result, these SF 6 decomposition products have been widely investigated as characteristic gases to diagnose power equipment failure. − Moreover, these products not only corrode the metal surfaces of the equipment, but are also harmful to the environment and human health. , Therefore, many studies explore the development of a sensing material in order to detect these harmful gases. − Most previous experimental reports adopt N 2 as the background gas in the experiment to simulate an SF 6 atmosphere in power equipment, since SF 6 gas is expensive and poisonous. , …”

“…2−7 Moreover, these products not only corrode the metal surfaces of the equipment, but are also harmful to the environment and human health. 8,9 Therefore, many studies explore the development of a sensing material in order to detect these harmful gases. 10−14 Most previous experimental reports adopt N 2 as the background gas in the experiment to simulate an SF 6 atmosphere in power equipment, since SF 6 gas is expensive and poisonous.…”