Authors :
Anisa Witri Sofiarani; Nur Rokhati
Volume/Issue :
Volume 8 - 2023, Issue 1 - January
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3WFfpGx
DOI :
https://doi.org/10.5281/zenodo.7554204
Abstract :
The aim of this study was to investigate the
dehydration of ethanol using the pervaporation process
based on a sweet potato starch-chitosan membrane. The
pervaporation process is an alternative to the energyintensive methods of ethanol dehydration, like distillation
and crystallization. To improve the properties of the
composite membrane by adding a crosslinking agent of
glutaraldehyde (1% v/v) and a support membrane of
polyethersulfone (PES) were added. The sweet potato
starch-chitosan membrane was modified with various
concentrations of 100:0, 80:40, 60:40, 50:50, 40:60, 20:80,
and 0:100. The characterization of the composite
membrane used tests such as swelling degree,
permeability, mechanical properties, and SEM to evaluate
the hydrophilicity, structure, and performance. The
increase of hydrophilicity showed at the value of swelling
degree of 204.16 to 226.52%, and permeability of 861.34 to
964.26 L/m2
.hr.bar. The structure of the membrane
improved by the addition of glutaraldehyde, shown in the
mechanical properties and SEM results. The best
composition is a ratio of 50:50 with a crosslinking agent
used for dehydration of ethanol with the pervaporation
process. The process used ethanol composition (95 wt.%)
and was observed for an hour. The value of selectivity in
the pervaporation process is 15% with an ethanol
concentration of 98%.
Keywords :
Pervaporation Process, Sweet Potato StarchChitosan Membrane, Glutaraldehyde, Dehydration of Ethanol
The aim of this study was to investigate the
dehydration of ethanol using the pervaporation process
based on a sweet potato starch-chitosan membrane. The
pervaporation process is an alternative to the energyintensive methods of ethanol dehydration, like distillation
and crystallization. To improve the properties of the
composite membrane by adding a crosslinking agent of
glutaraldehyde (1% v/v) and a support membrane of
polyethersulfone (PES) were added. The sweet potato
starch-chitosan membrane was modified with various
concentrations of 100:0, 80:40, 60:40, 50:50, 40:60, 20:80,
and 0:100. The characterization of the composite
membrane used tests such as swelling degree,
permeability, mechanical properties, and SEM to evaluate
the hydrophilicity, structure, and performance. The
increase of hydrophilicity showed at the value of swelling
degree of 204.16 to 226.52%, and permeability of 861.34 to
964.26 L/m2
.hr.bar. The structure of the membrane
improved by the addition of glutaraldehyde, shown in the
mechanical properties and SEM results. The best
composition is a ratio of 50:50 with a crosslinking agent
used for dehydration of ethanol with the pervaporation
process. The process used ethanol composition (95 wt.%)
and was observed for an hour. The value of selectivity in
the pervaporation process is 15% with an ethanol
concentration of 98%.
Keywords :
Pervaporation Process, Sweet Potato StarchChitosan Membrane, Glutaraldehyde, Dehydration of Ethanol