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46 SORBENT SELECTION: CRITERIA
70
60
% O 2 Product recovery 40 LiX
50
30
20 NaX
10
100 150 200 250 300
S = (∆q 1 /∆q 2 )a 1,2
Figure 3.3. O 2 product recovery (%) vs. sorbent selection parameter S for the comparison of
LiX (LiLSX) and NaX adsorbents for air separation at different pressure ratios. Refer to Table 3.3
for additional details (from Rege and Yang, 2001).
7.5
7.0
O 2 Product throughput × 10 2 (kg O 2 /h/kg) 6.0 LiAgX
6.5
LiX
5.5
5.0
4.5
4.0
180 200 220 240
S = (∆q 1 /∆q 2 )a 1,2
2
Figure 3.4. O 2 product throughput (kg O 2 /h/kg adsorbent) × 10 vs. sorbent selection param-
eter S for the comparison of LiX (LiLSX) and LiAgX adsorbents for air separation under different
cycle conditions. Refer to Table 3.4 for additional details (from Rege and Yang, 2001).
Sorbent Selection Parameters for Other Processes. The above analysis
pertains to bulk separation. For purification processes, that is, PSA, and TSA, as
well as liquid phase applications, no study has been reported for establishing a
sorbent selection parameter. In this case, obviously α 1,2 for the adsorption step
