Being interested in the sizing and optimization of supercritical fluid extraction plants for solid substrates, we are developing a computational tool to estimate changes in residual solute content in a solid substrate within one of the extraction vessels in a multi-vessel plant with a simulated counter-current contact between the solid substrate and continuously flowing supercritical CO2. In th...

In this work, our objective was to examine methods for processing cashew nut shell liquid and cashew shell with carbon dioxide and water. Supercritical CO2 was applied for extraction of split cashew shells and near-critical water was applied for reaction of the cashew shell material. In the extractions, it was found that a pressurization-depressurization step that was approximately 1 h gave ext...

The use of γ-Al2O3 as a heterogeneous catalyst in scCO2 has been successfully applied to the amination of alcohols for the synthesis of N-alkylated heterocycles. The optimal reaction conditions (temperature and substrate flow rate) were determined using an automated self-optimising reactor, resulting in moderate to high yields of the target products. Carrying out the reaction in scCO2 was shown...

Porous 85/15 poly (DL-lactide-co-glycolide) or PLGA foams were produced by the pressure quench method using supercritical CO2 as the blowing agent. The rate of CO2 uptake and CO2 equilibrium concentration in PLGA at different processing conditions were studied by performing sorption experiments. The effects of saturation pressure and temperature on average cell size and relative density of the ...

It has been proposed that the CO2 produced at sources such as fossil energy conversion facilities and industrial process plants could be captured, compressed to supercritical pressures, transported via pipelines and stored in underground geologic formations such as depleted oil and natural gas reservoirs and deep saline aquifers. In this paper, we describe the initial phases of a project using ...