Structured Polyvinyl Alcohol/Zeolite/Carbon Composites Prepared Using Supercritical Fluid Extraction Techniques as Adsorbent for Bioethanol Dehydration

Figure 5

Ethanol concentration vs. time for various adsorbents at the same temperature and initial water concentration. (a) Ethanol concentration 96% and temperature 22°C; (b) Ethanol concentration 88% and temperature 22°C. (c) Ethanol concentration 96% and temperature 30°C. (d) Ethanol concentration 88% and temperature 30°C. (e) Ethanol concentration 96% and temperature 40°C. (f) Ethanol concentration 88% and temperature 40°C. , PVA/Zeo/AC 1 : 1 : 1; ■, PVA/Zeo/AC 1 : 1 : 0.75; , PVA/Zeo/AC 1 : 1 : 0.5; , PVA/Zeo/AC 1 : 1 : 0.25; , PVA/Zeo/AC 1 : 1 : 0.

(a)

(b)

(c)

(d)

(e)

(f)