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

Table 5

Three components separation: toluene (ii), ethylbenzene (iii), and xylene (iv) at constant reflux.

Case	𝑅=𝐿/𝐷	Feed = 𝑊0 (kmol)	𝑡 harvest (h)	𝑡 total (h)	𝑊𝑡 (kmol)	𝑃ii (kmol)	P3-CAP; kg/h	CTA; USD
𝑁=20
A	2	300	.6	3	200	20.00	614	496,841
B	5	300	4.4	6	200	73.33	1126	888,801
C	10	300	9.6	11	200	87.27	730	1,539,172
D	15	300	14.5	15.9	200	90.62	525	1,366,393
E	20	300	19.4	21	200	92.38	405	1,439,891
𝑁=30
A	2	300	.6	3	200	20.00	614	504,500
B	5	300	4.4	6	200	73.33	1126	896,700
C	10	300	9.6	11	200	87.27	730	1,539,000
D	15	300	14.6	15.9	200	91.25	528	2,273,369
E	20	300	19.55	20.5	200	93.09	418	2,658,262
𝑁=40
A	2	300	.6	3	200	20.00	614	512,486
B	5	300	4.4	6	200	73.33	1126	906,834
C	10	300	9.6	11	200	87.27	730	1,556,655
D	15	300	14.6	16	200	93.09	535	2,183,616
E	20	300	19.55	20	200	93.05	428	2,720,369
𝑁=50
A	2	300	.6	3	200	20.00	614	523,077
B	5	300	4.4	6	200	73.33	1126	915,390
C	10	300	9.6	11	200	87.27	730	1,565,265
D	15	300	14.6	16	200	91.25	525	2,192,452
E	20	300	19.5	20	200	93.05	428	2,775,651