Agricultural byproducts-based biosorbents for purification of bioalcohols: a review

Bioresources and Bioprocessing

Table 5 Biobased sorbents for liquid phase drying of ethanol and butanol

Adsorbent-adsorbate	Adsorbent surface area (m²/g)	Reaction conditions/system	Water adsorption capacity (mol/g)	Separation factor	Initial and final alcohol concentration (%)	Refs.
Barley straw/ethanol	1.08	Room temperature, 130 rpm, 4 g in 150 ml liquid	0.43	6.15	5–90 to pure	Sun et al. (2007)
Wheat straw/ethanol	0.73	Room temperature, 130 rpm, 4 g in 150 ml liquid	0.22	6	5–90 to pure	Sun et al. (2007)
Crab shells of Ucides cordatus/ethanol	NA	Room temperature, 130 rpm, 4 g in 150 ml liquid	0.02	4.5	5–90 to pure	Sun et al. (2007)
Barley straw (raw-untreated)/ethanol	2 m²/g	Room temp.; 150 rpm	0.50		78 to 83	Yan and Niu (2017b)
Barley straw (pretreated using H₃PO₄ in microwave)/ethanol	105–1314 m²/g	Room temp.; 150 rpm	0.63		78 to 89	Yan and Niu (2017b)
Miscanthus (raw)/ethanol	0.43–0.74	Room temperature; 24 h at 160 rpm.	0.21–0.50	1.5–3.0		Dhabhai et al. (2017)
Miscanthus (pretreated)/ethanol	0.71–0.96	Room temperature; 24 h at 160 rpm	0.16–0.26			Dhabhai et al. (2017)
Canola meal/ethanol	NA	Room temperature, 130 rpm, 4 g in 150 ml liquid	0.13	2.5–4.0	4–90 to pure	Ranjbar et al. (2013)
Canola meal (raw; untreated)/butanol	13.2	Room temperature; 150 rpm; 0.43–1.18 mm particle size	0.24–0.31		5–90 to 19.8–96	Dhabhai et al. (2017)
Canola meal (pretreated; using H₂SO₄ in a microwave)/butanol	147.5	Room temperature; 0.43–1.18 mm particle size; 150 rpm	0.11–0.13		5–90 to 23–98	Dhabhai et al. (2018)