Breakthrough curves and adsorption isotherms of terpene mixtures in supercritical carbon dioxide

Adsorption isotherms for ethylacetate and furfural on activated carbon from supercritical carbon dioxide

“…This indicates that at higher density (or higher pressure), the interaction forces between the solute and the carbon dioxide molecules increase as compared to the bonding forces between the solute and the activated carbon surface. These results are consistent with the results from the literature [16,21,[24][25][26]. This fact illustrate that a higher regeneration efficiency of the activated carbon loaded with furfural can be obtained when the density is increased.…”

“…the Langmuir, the Freundlich and the Redlich-Peterson models [13][14][15]. In supercritical adsorption processes, the adsorption equilibrium is influenced by the system temperature and by the supercritical fluid density [16]. Up to now, due partly to insufficient data, the density and temperature dependence of the isothermal parameters have not been established except in some references such as supercritical adsorption equilibria of salicylic acid [17].…”

Adsorption equilibrium of citric acid from supercritical carbon dioxide/ethanol on cyano column

“…Only a few researches have been reported on adsorption isotherms from supercritical fluid. The adsorption equilibrium of some solutes, such as benzoic acid and acetylsalicylic acid [11], salicylic acid [12], ethyl benzene [13], toluene and ethyl acetate [14,15], α-tocopherol and δ-tocopherol [16,17], terpene [18,19], furfural [20], eicosane and 1,2-hexanediol [21] etc, from sc-CO 2 have been studied. However, because of the complex nature of adsorbent-adsorbate interactions, it is hard to theoretically predict adsorption isotherms.…”

Density‐Dependent Formation of the Pure trans‐Isomer of the Unsaturated Alcohol by Selective Hydrogenation of Citral in Supercritical Carbon Dioxide

“…Density-dependent adsorption of CO 2 with different solutes on the catalyst surface is a well known phenomenon. [17][18][19] We are aware that the density of the supercritical medium changes substantially either by changing the pressure or temperature. For example, a change in pressure from 4 to 14 MPa the density changes from 1.6181 to 10.406 mol/L (NIST Chem web book) and the solubility of the citral increases.…”