The deposition of salts from hydrocarbon flames containing sodium and sulphur species

✍ Scribed by R.A. Durie; J.W. Milne; M.Y. Smith

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 634 KB
• Volume: 30
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(77)90071-2

✦ Synopsis

The composition of deposits formed at 723 K on a probe inserted in premixed hydrocarbon-air flames containing sodium and sulphur was investigated as a function of flame stoichiometry and the position of the probe in the flame. The deposit consisted essentially of three compounds: Na2CO3(s), Na2SOa(s ) and Na2SO4(s) in proportions which varied with the fuel/air ratio. The observed variation of deposit composition with flame stoichiometry has been accounted for by a comprehensive thermodynamic model of the flames. The composition of the deposit corresponds to thermodynamic equilibrium at the temperature of the probe and not at the much higher temperature of the flame gases. A mechanism for the formation of sulphate has been postulated on the basis of the experimental results and equilibrium computations.

EXPERIMENTAL

Premixed fuel and air were burnt on a stainless steel Meker-type burner (50 mm dia) and deposits were collected on the bottom of a stainless steel