“…Especially when the compression ratio of the HIDiC is maintained at a constant value and the purity of the bottom product is high, multiple steady-states appear in a wide range of operating conditions, suggesting that the operation and the control strategies for the HIDiC should be di erent from those for the CDiCs. Huang et al have been studying the dynamic behavior of HIDiCs (Huang et al, , 2006b(Huang et al, , 2006c(Huang et al, , 2006d(Huang et al, , 2006e, 2006f, 2006g, 2007a(Huang et al, , 2007b. Recently, they reported a new temperature control scheme for HIDiCs (Huang et al, 2008).…”