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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NaSO2 by Materials Project

NaSO2 crystallizes in the monoclinic P2/c space group. The structure is two-dimensional and consists of one NaSO2 sheet oriented in the (0, 1, 0) direction. Na is bonded in a 5-coordinate geometry to five O atoms. There are a spread of Na–O bond distances ranging from 2.36–2.48 Å. S is bonded in a water-like geometry to two O atoms. There is one shorter (1.52 Å) and one longer (1.53 Å) S–O bond length. There are two inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to two equivalent Na and one S atom. In the second O site, O is bonded in a rectangular see-saw-like geometry to three equivalent Na and one S atom.

36 MATERIALS SCIENCE↗
NASA NTRS1977

Gaseous sodium sulfate formation in flames and flowing gas environments

Formation of Na2SO4(g) in flames and hot flowing gas systems was studied by high pressure, free-jet expansion, modulated molecular beam mass spectrometric sampling. Fuel-lean CH4-O2 flames doped with SO2, H2O and NaCl yielded the gaseous Na2SO4 molecule in residence times of less than one millisecond. Intermediate species NaSO2(g) and NaSO3(g) were also observed and measured. Composition profiles were obtained for all reaction products. Nonflame flowing gas experiments showed that Na2SO4 and NaSO3 gaseous molecules were formed at 1140 C in mixtures of O2, H2O(g), SO2 and NaCl(g). Experimental results are compared with calculated equilibrium thermodynamic predictions.

Stearns, C. A.↗
NASA NTRS1977

Gaseous sodium sulfate formation in flames and flowing gas environments

Formation of Na2SO4(g) in flames and hot flowing gas systems was studied by high pressure, free-jet expansion, modulated molecular beam mass spectrometric sampling. Fuel-lean CH4-O2 flames doped with SO2, H2O and NaCl yielded the gaseous Na2SO4 molecule in residence times of less than one millisecond. Intermediate species NaSO2(g) and NaSO3(g) were also observed and measured. Composition profiles were obtained for all reaction products. Non-flame flowing gas experiments showed that Na2SO4 and NaSO3 gaseous molecules were formed at 1140 C in mixtures of O2, H2O(g), SO2 and and NaCl(g). Experimental results are compared with calculated equilibrium thermodynamic predictions.

Stearns, C. A.↗