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Received October 11, 2006
Accepted November 6, 2006
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Effects of desorbent flowrate on simulated moving bed process
Department of Chemical Engineering, Hankyong National University, 67 Seokjung-dong, Anseong-si, Gyonggi-do 456-749, Korea
Korean Journal of Chemical Engineering, May 2007, 24(3), 391-396(6), 10.1007/s11814-007-0067-x
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Abstract
This article presents the effects of the desorbent flowrate (or m1) on simulated moving bed (SMB) process performance at constant m2, m3 and m4, where the m-values (mj) are defined as the net flowrate ratios of the zone, j, to the solid flowrate. A complete m-plane analysis of SMB systems (ComPASS) has been developed that illustrates how the desorbent flowrate is determined within the complete m-plane (i.e., fluid-solid flowrate ratio plane) to enhance the SMB process performance. The effects of desorbent flowrate are presented numerically for linear/equilibrium and nonlinear/nonequilibrium SMB processes. The results of the studies using ComPASS show that for linear/equilibrium SMB process, it is desirable to determine the minimum desorbent flowrate (m1) within the complete separation region. For the nonlinear/nonequilibrium SMB process, the desorbent flowrate can be determined at the minimum value which maximizes the raffinate purity.
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References
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