Mini-Review: Green sustainable processes using supercritical fluid carbon dioxide

Chlorophyll Extraction from Microalgae: A Review on the Process Engineering Aspects

“…From then on, the Montreal Protocol has evolved and most solvents that are damaging to the environment have been restricted. As a result, more industries are looking into a new sustainable process that does not involve environmentally damaging solvents [38]. Supercritical fluid extraction (SFE) is a popular method to replace organic solvent extraction.…”

Metal-free and VOC-free O-glycosylation in supercritical CO2

“…Thus, galactosyl chloride 2 required higher temperatures to be activated in scCO 2 than its bromide counterpart, the optimal conditions being 90°C and 1500 Psi (Table 1, entry 14 vs. entries [10][11][12][13]. These results open the way for exploring the possibility of performing orthogonal glycosylations in scCO 2 in the future.…”

“…In this respect, supercritical carbon dioxide (scCO 2 ) has emerged as an attractive non-toxic, low cost, abundant and easy to recycle green solvent. 10 Furthermore, scCO 2 is easily accessed (T c = 31.1°C, P c = 72.9 atm, 1071,33 Psi) 11 and can be removed after the reaction by simple depressurization. For these reasons, the interest in using this solvent has increased exponentially in recent years.…”

Nanotechnology and supercritical fluids

“…and pressure and there exists density inhomogeneity in the critical region. In a sc solution, the density of the solvent around the solute can be much larger than that of the bulk, especially in the critical region of sc solvents, which is often called clustering [17][18][19][20][21][22][23][24][25]. Not all properties of SCFs are intermediate between those of gases and liquids; compressibility and heat capacity, for example, are significantly higher near the critical point than they are in liquids or gases (or even in the supercritical state further from the critical point).…”