Supercritical CO2 Extraction of Ethanol

A. GÜVENÇ; Ü. MEHMETOĞLU; A. ÇALIMLI

Article Details

Supercritical CO2 Extraction of Ethanol

Authors:

A. GÜVENÇ | Ü. MEHMETOĞLU | A. ÇALIMLI

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 1999 Vol.23 Issue 3, pp.285-292

Document Type:

Article

Publication Date:

2/1999

Document Language:

Turkish

Document ID (Org No.):

2000730406

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527

Abstract:

 

Extraction of ethanol was studied from both synthetic  ethanol solution and fermentation broth using supercritical CO2 in an  extraction apparatus in ranges of 313 to 333 K and 80 to 160  atmospheres, for varying extraction times.  The experimental system  consists mainly of four parts: a CO2 storage system, a high-pressure  liquid pump, an extractor and a product collection unit.  Samples were  analyzed by gas chromatography.  Effects of temperature, pressure,  extraction time, initial ethanol concentration and consecutive solvent  feeding on extraction yield were investigated.  It was found that  increasing the initial ethanol concentration and extraction pressure  and decreasing the extraction temperature increased the extraction  yield.  In addition, it was observed that consecutive solvent feeding  affected the extraction yield positively.  With the Box-Wilson  experimental design method, optimum extraction conditions in a batch  system for 15% (v/v) ethanol solution were found to be 313 K, 133  atmospheres and 30 minutes.  Extraction yields were found to be 5.8%  for one-step and 19.2% for three-step extraction of fermentation  broth.

 

Extraction of ethanol was studied from both synthetic  ethanol solution and fermentation broth using supercritical CO2 in an  extraction apparatus in ranges of 313 to 333 K and 80 to 160  atmospheres, for varying extraction times.  The experimental system  consists mainly of four parts: a CO2 storage system, a high-pressure  liquid pump, an extractor and a product collection unit.  Samples were  analyzed by gas chromatography.  Effects of temperature, pressure,  extraction time, initial ethanol concentration and consecutive solvent  feeding on extraction yield were investigated.  It was found that  increasing the initial ethanol concentration and extraction pressure  and decreasing the extraction temperature increased the extraction  yield.  In addition, it was observed that consecutive solvent feeding  affected the extraction yield positively.  With the Box-Wilson  experimental design method, optimum extraction conditions in a batch  system for 15% (v/v) ethanol solution were found to be 313 K, 133  atmospheres and 30 minutes.  Extraction yields were found to be 5.8%  for one-step and 19.2% for three-step extraction of fermentation  broth.

Article Details

Supercritical CO2 Extraction of Ethanol

Authors: A. GÜVENÇ | Ü. MEHMETOĞLU | A. ÇALIMLI

Publisher: TUBITAK

Journal: Turkish Journal of Chemistry 1999 Vol.23 Issue 3, pp.285-292

Document Type: Article

Publication Date: 2/1999

Document Language: Turkish

Document ID (Org No.): 2000730406

Frequency: Bimonthly

eISSN: 1303-6130

pISSN: 1300-0527

Issues

Authors:

A. GÜVENÇ | Ü. MEHMETOĞLU | A. ÇALIMLI

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 1999 Vol.23 Issue 3, pp.285-292

Document Type:

Article

Publication Date:

2/1999

Document Language:

Turkish

Document ID (Org No.):

2000730406

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527