Raman spectroscopy has been linked to a high-pressure optical cell for the in situ study of supercritical carbon dioxide (SC-CO2)-solute interactions. The body of the cell is made of a stainless steel cylinder enclosing a volumetric capacity of 24 mL, allowing optical access through sapphire windows on both ends. An argon ion laser was used for the excitation and Raman spectra were collected in...

The reaction kinetics between CO2 and trihexyl(tetradecyl)phosphonium ([P66614])-based ionic liquids (ILs) with prolinate ([Pro]), 2-cyanopyrrolide ([2-CNpyr]), and 3-(trifluoromethyl)pyrazolide ([3-CF3pyra]) anions are studied at temperatures from 22-60 °C. The absorption of CO2 is carried out in a stirred reactor under pseudo first order conditions. ILs are diluted to concentrations of 0.05, ...

The binding domains within a mixed matrix membrane (MMM) that is selective for CO2 comprising MFM-300(Al) and the polymer 6FDA-Durene-DABA have been established via in situ synchrotron IR microspectroscopy. The MOF crystals are fully accessible and play a critical role in the binding of CO2, creating a selective pathway to promote permeation of CO2 within and through the MMM. This study reveals...

the density and viscosity of carbonated aqueous 35wt% methyldiethanolamine solution were experimentally measured accompanied with the solubility of co2 at temperatures from (303.15 to 363.15) k and pressures up to 0.8 mpa using the new setup developed in our laboratory.it was observed that both density and viscosity of mixtures decrease by increasing temperature and increase by increasing acid ...

A fully atomistic simulation study is reported to provide mechanistic insight into the superior performance experimentally observed for a polymer membrane (Carta et al., Science, 2013, 339, 303-307). The membrane namely PIM-EA-TB is produced by a shape-persistent ladder polymer of intrinsic microporosity (PIM) with rigid bridged bicyclic ethanoanthracene (EA) and Tröger's base (TB). The simulat...

Using a continuous flow apparatus, the solubility of tridodecylamine (TDA) in supercritical CO2 (scCO2), have been measured at temperatures of 308, 318, and 328 K in the pressure range of (8-40) MPa and a flow rate of 150 ± 10 mL min. At 308 and 318 K the solubility increases with pressure up to 15 MPa where it reaches a plateau. At 328 K the solubility increases with pressure up to 35 MPa and ...

The need for accurate modeling of fluid-mineral processes over wide ranges of temperature, pressure and composition highlighted considerable uncertainties of available property data and equations of state, even for the CO2 + H2O binary system. In particular, the solubility, activity, and ionic dissociation equilibrium data for the CO2-rich phase, which are essential for understanding dissolutio...

Title of Thesis: MODELING OF MINERAL TRAPPING FOR CO2 SEQUESTRATION Mohammad Alizadeh Nomeli, MS, 2011 Thesis Directed By: Advisor: Dr. Amir Riaz Co-advisor: Dr. Alba Torrents Department of Civil and Environmental Engineering In order to prevent CO2 concentrations in the atmosphere from rising to unacceptable levels, carbon dioxide is sequestered beneath the ground surface. CO2 can be trapped a...

Geological carbon dioxide (CO2) sequestration entails capturing and injecting CO2 into deep saline aquifers for long-term storage. The injected CO2 partially dissolves in groundwater to form a mixture that is denser than the initial groundwater. The local increase in density triggers a gravitational instability at the boundary layer that further develops into columnar plumes of CO2-rich brine, ...