Supercritical Carbon Dioxide Extraction of Clove Syzygium Aromaticum Bud Oil in an Annular Grate Feed Contactor: Effect of Axial to Radial Surface Enhancement Factor
Sutapa Roy1, Chandan Guha2, Asit Kumar Saha3, Somak Jyoti Sahu4
1Sutapa Roy, Department of Chemical Engineering, Haldia Institute of Technology, Haldia (West Bengal), India
2Chandan Guha, Department of Chemical Engineering, Jadavpur University, Kolkata (West Bengal), India.
3Asit Kumar Saha, Department of Chemical Engineering, Haldia Institute of Technology, Haldia (West Bengal), India.
4Somak Jyoti Sahu, Department of Chemical Engineering, Haldia Institute of Technology, Haldia (West Bengal), India
Manuscript received on 07 April 2019 | Revised Manuscript received on 20 April 2019 | Manuscript published on 30 April 2019 | PP: 290-301 | Volume-8 Issue-6, April 2019 | Retrieval Number: F3498048619/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Experimental investigations were carried out with and without incorporating a perforated concentric tube (diameter 0.75 cm or 0.15 cm with one blind end at the upstream side) within a typical cylindrical extraction bed. A new parameter, axial to radial surface enhancement factor, [(ro -ri )/2L], was defined to correlate the effect of bed geometry with extraction performance. Supercritical CO2 extraction of clove bud for essential oils was carried out with three different bed geometry at three different pressures (14.7, 19.6, & 24.5 MPa) and temperatures (350C, 400C & 450C) combination. Detailed analysis of the extraction rate data was presented and found to have two distinct rate periods, namely constant extraction rate period and falling extraction rate period with a small transition period in-between. Effects of bed geometry, temperature, and pressure on the oil yield were analyzed statistically using face centered central composite design technique. The optimum conditions were identified as 24.5MPa pressure, 44.72 °C temperature and bed type with 0.15cm perforated concentric tube with the optimal yield of 17.981.
Keyword: Supercritical Carbon Dioxide Extraction, Clove oil, Central Composite Design, Kinetic Study, Surface Enhancement Factor.
Scope of the Article: Frequency Selective Surface