Title:
METHODS AND SYSTEMS USEFUL FOR DRYING ETHANOL
Document Type and Number:
WIPO Patent Application WO/2012/112546
Kind Code:
A3
Abstract:
Mixtures of ethanol and water are dehydrated using starch pearls to adsorb and remove water. Vapor-phase adsorption equilibrium capacities of cassava starch pellets (tapioca pearls) having different particle sizes are disclosed, and tapioca pearl particles are shown to be surprisingly more effective for dehydrating 88 to 97% w/w feed ethanol than corn grits. The adsorption equilibrium curve and BET surface area measurement show that the adsorption capacity of tapioca pearls is a function of surface area available to water molecules. SEM images demonstrate that the particle architecture required for the adsorption and dehydration properties is that of a core- shell configuration with pre-gel starch acting as a central scaffold holding together other particles to the outer layer of the particle. The outer surface area of the pearls, populated with dry starch granules, is the main factor determining the adsorption capacity of the pearls. Tapioca pearls are shown to possess a surprisingly higher adsorption capacity than corn grits of the same particle size. Pearls of 2 mm size in diameter gave 34% higher linear adsorption equilibrium constant ( K ) than grits of 1.7 mm.
Inventors:
KIM YOUNGMI (US)
HENDRICKSON RICHARD L (US)
MOSIER NATHAN (US)
LADISCH MICHAEL R (US)
HILALY AHMAD K (US)
HENDRICKSON RICHARD L (US)
MOSIER NATHAN (US)
LADISCH MICHAEL R (US)
HILALY AHMAD K (US)
Application Number:
PCT/US2012/025042
Publication Date:
April 17, 2014
Filing Date:
February 14, 2012
Export Citation:
Assignee:
PURDUE RESEARCH FOUNDATION (US)
ARCHER DANIELS MIDLAND CO (US)
KIM YOUNGMI (US)
HENDRICKSON RICHARD L (US)
MOSIER NATHAN (US)
LADISCH MICHAEL R (US)
HILALY AHMAD K (US)
ARCHER DANIELS MIDLAND CO (US)
KIM YOUNGMI (US)
HENDRICKSON RICHARD L (US)
MOSIER NATHAN (US)
LADISCH MICHAEL R (US)
HILALY AHMAD K (US)
International Classes:
C07C29/76; B01J20/24
Foreign References:
| US20060047068A1 | 2006-03-02 | |||
| US20070088182A1 | 2007-04-19 | |||
| US20060008791A1 | 2006-01-12 | |||
| US20080261807A1 | 2008-10-23 | |||
| US20030104587A1 | 2003-06-05 | |||
| US20060032935A1 | 2006-02-16 | |||
| US20060005285A1 | 2006-01-05 | |||
| US20060040024A1 | 2006-02-23 |
Other References:
QUINTERO ET AL.: "Ethanol Dehydration by Adsorption with Starchy and Cellulosic Materials", IND. ENG. CHEM. RES., vol. 48, 2009, pages 6783 - 6788, XP055136887
Attorney, Agent or Firm:
GANDY, Kenneth A. et al. (Emhardt Moriarty, McNett & Henry LLP,111 Monument Circle, Suite 370, Indianapolis IN, US)
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