Sorption of organics and water on starch
- Purdue Univ., West Lafayette, IN (United States). Lab. of Renewable Resources Engineering
Starch is a well-established adsorption agent for drying ethanol. This work examines its potential for other gas-phase drying applications. Results from gas chromatography studies confirm that starch separates water from organic acids, alcohols, ketones, ethers, and aromatics, many of which form azeotropes with water. Trends in organics with respect to size and functional group show that the efficiency of this separation is related to both transport properties and strength of interaction between the organic components and starch. Small, polar molecules such as methanol and formic acid that have rapid mass-transfer characteristics and relatively strong interactions with starch are retained to a greater degree and are more difficult to separate from water than either compounds of higher molecular weight or decreased polarity. The large number of possible separations indicates that starch is a versatile material for use in sorbents for vapor-phase separations.
- OSTI ID:
- 5866661
- Journal Information:
- Industrial and Engineering Chemistry Research; (United States), Vol. 32:8; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALCOHOLS
SORPTION
AROMATICS
ETHERS
KETONES
ORGANIC ACIDS
STARCH
SORPTIVE PROPERTIES
GAS CHROMATOGRAPHY
MASS TRANSFER
SEPARATION PROCESSES
WATER
CARBOHYDRATES
CHROMATOGRAPHY
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
POLYSACCHARIDES
REAGENTS
SACCHARIDES
SURFACE PROPERTIES
400105* - Separation Procedures