Enhanced Catalyst Reactivity and Separations Using Water/Carbon Dioxide Emulsions

Concentrated CO2-in-Water Emulsions with Nonionic Polymeric Surfactants

“…Emulsions involving water and CO 2 are being developed for solubilization and separations of proteins (25,26), ions and heavy metals (43), enzymatic catalysis (16), organometallic catalysis (44), and synthesis of inorganic nanoparticles (18). …”

Insoluble Wilkinson Catalyst RhCl(TPPTS)3 Supported on SBA-15 for Heterogeneous Hydrogenation with and Without Supercritical CO2

“…The catalyst was prepared by an incipient-wetness procedure without any pretreatment of SBA-15. Firstly, 0.06 mmol TPPTS was added to 10 mL water, then 0.01 mmol Rh 2 (CO) 4 Cl 2 was added to the solution, and a yellow solution was obtained. One gram of SBA-15 was added into the solution.…”

“…Mehnert et al [2a] reported an ionic liquid supported Wilkinson catalytic system. Tumas et al [4] studied a RhCI(TPPDS) 3 water/CO 2 emulsion catalytic system for hydrogenation of alkenes. Some other water/organic biphasic Wilkinson catalytic systems were also investigated [5].…”

Decontamination of Radioactive Contaminants Using Liquid and Supercritical CO2

“…To date, a majority of the investigation into the formation of macroemulsions in CO 2 has focused on the development of surfactants. Johnston found that water-in-supercritical CO 2 (W/C) emulsions were formed with a variety of surfactants such as fluorinated [26,27], block copolymer [28][29][30], nonionic polymer [31], and hydrocarbon [32].…”