Bubble-size distribution in Fischer-Tropsch-derived waxes in a bubble column Academic Article uri icon


  • Bubble sizes were measured for molten waxnitrogen systems using photography and dynamic gas disengagement. The effects of operating conditions, system geometry and wax type were studied in 0.05 and 0.23mdiameter by 3mtall bubble columns. Both techniques were used with FT300 wax, while only the dynamic gas disengagement technique could be used with reactor waxes due to their dark color. For FT300 wax, Sauter mean diameters obtained from photographs taken near the column wall were significantly lower than those obtained from photographs taken near the center. The ds values obtained from dynamic gas disengagement and photographic (near the column center) methods, for this noncoalescing medium, were in the range 0.51.6 mm in the largediameter column. For reactor waxes, ds values were significantly higher (12 mm for Sasol and 15.5 mm for Mobil's reactor wax) and are in agreement with results reported in earlier studies with similar waxes (ds = 24 mm), where different experimental techniques (light transmission or hot wire anemometry) were employed. Copyright 1990 American Institute of Chemical Engineers

published proceedings

  • AIChE Journal

author list (cited authors)

  • Patel, S. A., Daly, J. G., & Bukur, D. B.

complete list of authors

  • Patel, Snehal A||Daly, James G||Bukur, Dragomir B

publication date

  • January 1, 1990 11:11 AM