1. Solute-saturated supercritical CO2 loading of 2-phenylethyl alcohol in silica and activated carbon: Measurement and mechanism.
- Author
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Song, Lei, Chen, Yifan, Chen, Kainan, Hu, Xiaohui, Hong, Yanzhen, Wang, Hongtao, and Li, Jun
- Subjects
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SUPERCRITICAL carbon dioxide , *ALCOHOL , *SILICA , *ACTIVATED carbon , *SUPERCRITICAL fluids , *ADSORPTION (Chemistry) - Abstract
A solute-saturated supercritical fluid loading (SSFL) process was proposed to load 2-phenylethyl alcohol (PEA) in silica and activated carbon (AC). The adsorption and loading amounts of PEA in carries were investigated at different temperatures (50.0–60.0 °C) and pressures (8.0–14.0 MPa) by a column sampling method. By using a high-pressure quartz spring method, the adsorption amounts of the binary PEA and CO 2 in silica were determined. The retention of PEA in the SSFL powder flavors was evaluated by a nitrogen-purging method. Results revealed that, compared with AC, silica had high loading of PEA (maximum 0.484 g/g) and showed better results in PEA preservation from loss at room temperature and control release at higher temperature; PEA suppressed the adsorption of CO 2 at relatively high pressure. Discussion indicated that precipitation and adsorption contributed to the high loading of PEA in silica, while adsorption mainly contributed to that in AC. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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