The formation of ultrafine particles by gas to particle conversion is hypothesized to explain the large concentration of ultrafine particles measured downstream of pressure reducing devices on cylinder gases of helium, nitrogen, and argon. These high concentrations of ultrafine particles can be reduced by the insertion of an appropriate purifying stage upstream of the pressure reducing device.
Particles in High Pressure Cylinder Gases: Gas to Particle Conversion During Expansion
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Ravindran Periasamy, Fu-Lin Chen, David Ensor, Robert Donovan, Robert Denyszyn; Particles in High Pressure Cylinder Gases: Gas to Particle Conversion During Expansion. Journal of the IEST 1 July 1988; 31 (4): 20–25. doi: https://doi.org/10.17764/jiet.1.31.4.tq403v88424131p3
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