Packed Bed flooding.pdf - Youngstown State University's Personal ...
Packed Bed flooding.pdf - Youngstown State University's Personal ...
Packed Bed flooding.pdf - Youngstown State University's Personal ...
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FIG. 14-58 The Robbins generalized pressure-drop correlation. (From L. A.<br />
Robbins. Chem Eng. Progr., May 1991. p. 87, reprinted courtesy of the American<br />
Institute of Chemical Engineers.)<br />
HETP, in<br />
EQUIPMENT FOR DISTILLATION AND GAS ABSORPTION: PACKED COLUMNS 14-65<br />
0.0 0.5 1.0 1.5 2.0 2.5 3.0<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
3.5 inch (88.9 mm)<br />
2 inch (50.8 mm)<br />
Harrison and France (loc. cit.) presented the only published rule of<br />
thumb for structured packings efficiency as a function of packing<br />
crimp. Kister and Larson reexpressed it in terms of the surface area<br />
per unit volume to accommodate a wider range of packing geometries.<br />
The final expression is<br />
F s , m/s (kg/m 3 ) 0.5<br />
30<br />
0.8<br />
5/8 inch (15.9 mm)<br />
20<br />
0.4<br />
10<br />
1 inch (25.4 mm)<br />
0<br />
0.0 0.4 0.8 1.2 1.6 2.0 2.4<br />
0.0<br />
2.8<br />
F s , ft/s (lb/ft 3 ) 0.5<br />
HETP = 100C XY/ap + 0.10 (14-159)<br />
Specific surface areas are listed in Tables 14-13 and 14-14.<br />
The above rules of thumb apply to organic and hydrocarbon systems,<br />
whose surface tensions are relatively low (σ
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