Page 189 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

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Table 7. Geometrical diaracteristics of the packings used for obtaining the experimental constants
in Eq. (25).

No Symbol Packing type and size, Specific surface Free Reference
area volume
mm
2
m /m 3
18 in Shortened Ring Element* 201 0.74 Kolev [8]
15.9x25x3
19 © Ceramic Raschig Ring* 189 0.76 Kolev [8]
25.3x25,3x3
20 ffl Ceramic Raschig Ring* 25 175 0.69 Sarchet [314]
21 IS Ceramic Raschig Ring* 25 175 0.67 Furnace [337]
22 0 Ceramic Raschig Ring* 330 0.70 Uchida [191]
15x15
23 A Ceramic Raschig Ring** 25 175 0.69 Schoenborn
[234]
24 • Ceramic Raschig Ring*** 175 0.69 Schoenborn
25 [234]
25 H Ceramic Raschig Ring* 25 175 0.69 Schoenborn
[234]
26 Plastic Pall Ring* 50x50 110 0.85 Kolev [«\
27 -K Ceramic Malax Saddle* SO 118 0.79 Kolev [8]
28 > Ceramic Intalox Saddle* 70 84 0.79 Kolev [8]
-system air-water
-system air-machine oil with viscosity 0.0108 Pa.s and density 889 kg/m 3
-system air- machine oil with viscosity 0.0373 Pa.s and density 900 kg/m 3

In Fig, 13 a comparison between the experimental data for the packings
presented in Table 7 and these calculated by equations (259) and (260), Chapter
1, and Eqs. (25) and (26) for the same conditions is presented.
It is worth noting that the equations (259) and (260) from Chapter 1,
and (25) and (26) described well also the data of Reichelt [35] obtained for short
ceramic rings filled not only in a column but also in vertical tubes. The
geometrical data for the corresponding packings are presented in Table 8.