Solute-saturated supercritical CO2 loading of 2-Phenylethyl Alcohol (cas 19601-20-8) in silica and activated carbon: Measurement and mechanism

Add time:08/24/2019    Source:sciencedirect.com

A solute-saturated supercritical fluid loading (SSFL) process was proposed to load 2-Phenylethyl Alcohol (cas 19601-20-8) (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 CO2 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 CO2 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.

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