Eco-efficient recovery of bio-based volatile C2–6 fatty acids

Table 5 Economics of VFAs’ recovery process

Variable	EX I	SR I	DS I	EX II	AZ I	AZ II	DS II	DS III
Investment
Column	126.9	53.2	10.9	159.2	42.9	90.7	80.4	72.9
Tray	6.4	1.34	0.2	9.1	1.2	3.5	2.6	2.4
Heat exchanger		55.6	12.0		253.8	99.3	115.9	60.4
Subtotal			266.5					994.3
Total								1261
Utility
Steam		33.5	2.0		141.7	48.3	108.2	23.3
Water		0.4	0.1		6.5	2.1	0.6	1.0
Subtotal			36.0					331.7
Total								367.7

Units are in thousand U.S. dollars and the utility cost is per annum. Equipment names are in the order presented in the PFD
Equipment abbreviation; EX I, extractor I; SR I, solvent recovery I; DS I, distillation column I; EX II, extractor II; AZ I, azeotropic column I; AZ II, azeotropic column II; DS II, distillation column II; DS III, distillation column III

ISSN: 2731-3654