Design of Batch Distillation Columns Using Short-Cut Method at Constant Reflux

Table 4

Four-component separation: benzene (i), toluene (ii), ethylbenzene (iii), and o-xylene (iv) at constant reflux.

Case	𝑅=𝐿/𝐷	Feed = 𝑊0 (kmol)	𝑡 harvest (h)	𝑡 total (h)	𝑊𝑡 (kmol)	𝑃i (kmol)	P4-CAP; kg/h	CTA; USD
𝑁=20
A	2	400	2.1	3	300	70.00	1883	493,757
B	5	400	5.3	6	300	88.33	1148	874,550
C	10	400	10.3	11	300	93.63	677	1,508,046
𝑁=30
A	2	400	2.1	3	300	70.00	1883	503,206
B	5	400	5.3	6	300	88.33	1148	884,009
C	10	400	10.3	11	300	94.54	677	1,517,531
𝑁=40
A	2	400	2.1	3	300	70.00	1883	512,486
B	5	400	5.3	6	300	88.33	1148	893,299
C	10	400	10.3	11	300	94.54	677	1,508,046
𝑁=50
A	2	400	2.1	3	300	70.00	1883	521,676
B	5	400	5.3	6	300	88.33	1148	902,498
C	10	400	10.4	11	300	94.54	677	1,536,028