氮氩氧三元系统(N2,0.7812;Ar,0.0093;O2,0.2095)最小分离功与氮氧二元系统(N2,0.79;O2,0.21)最小分离功的比值:
d' A6 X7 }2 R& D" j' B2 b0 I(0.7812*ln(1/0.7812)+0.0093*ln(1/0.0093)+0.2095*ln(1/0.2095))/(0.79*ln(1/0.79)+0.21*ln(1/0.21))=1.1; {+ [! O2 T4 q0 [, K2 x0 s, Q) x, Y
9 o7 s; R* ~' ^2 ~* T
但氩与氧的沸点太接近,氩氧精馏分离效率很低,实际三元分离(得到氮、氩、氧三种产品)比二元分离(只得到氮和氧两种产品,氩存在于氧气产品中)能耗高15%~20%
2 P/ C+ l# G3 C% O2 E4 F$ f$ g |