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Article
Ethanol purification with ozonation, activated carbon adsorption, and gas stripping
Separation and Purification Technology
  • Shinnosuke Onuki, Iowa State University
  • Jacek A. Koziel, Iowa State University
  • William S. Jenks, Iowa State University
  • Lingshuang Cai, Iowa State University
  • Somchai Rice, Iowa State University
  • Johannes van Leeuwen, Iowa State University
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
9-4-2015
DOI
10.1016/j.seppur.2015.07.026
Abstract

Fermentation of sugar to produce ethanol also produces volatile byproducts. This study was aimed at purifying corn-based ethanol for industrial and pharmaceutical use. The research was on treatment for 10 impurities removal after distillation. The ethanol headspace was sampled with solid-phase microextraction and analyzed with gas chromatography–mass spectrometry. A 40 mg/L ozone treatment resulted in >56% and >36% removal of styrene and 2-pentylfuran, respectively, without significant generation of byproducts. A 60 g/L activated carbon (AC) treatment with 270 min adsorption time resulted in 84%, >72%, and >78% removal of ethyl hexanoate, ethyl octanoate, and ethyl decanoate respectively. CO2-based stripping, at 675 LStripping gas/LSample, removed 65%, >82%, and >83% acetaldehyde, ethyl vinyl ether, and 1,1-diethoxyethane respectively. A combination of three approaches effectively removes these 8 impurities.

Comments

This article is published as Onuki, Shinnosuke, Jacek A. Koziel, William S. Jenks, Lingshuang Cai, Somchai Rice, and J. Hans van Leeuwen. "Ethanol purification with ozonation, activated carbon adsorption, and gas stripping." Separation and Purification Technology 151 (2015): 165-171. DOI: 10.1016/j.seppur.2015.07.026. Posted with permission.

Copyright Owner
Elsevier B.V.
Language
en
File Format
application/pdf
Citation Information
Shinnosuke Onuki, Jacek A. Koziel, William S. Jenks, Lingshuang Cai, et al.. "Ethanol purification with ozonation, activated carbon adsorption, and gas stripping" Separation and Purification Technology Vol. 151 (2015) p. 165 - 171
Available at: http://works.bepress.com/somchai_rice/11/