Predicting the phase behavior of nitrogen + n-alkanes for enhanced oil recovery from the SAFT-VR approach: Examining the effect of the quadrupole moment

Article Abstract:

The statistical associating fluid theory for potentials of variable range (SAFT-VR) equation of state is extended to account for quadrupolar interactions by using a Pade-approximation term derived from perturbation theory. The inclusion of the quadrupolar interaction into the SAFT-VR equation improves the predictive ability of the SAFT-VR EOS when studying the phase behavior of alkane + nitrogen systems and reduces the need to use effective parameters by explicitly including at the molecular level interactions due to the quadrupole moment.

Mexico, Alkanes

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Preparation and catalytic performances of ultralarge-pore TiSBA-15 mesoporous molecular sieves with very high Ti content

Article Abstract:

Highly ordered TiSBA-15 mesoporous molecular sieves with different n(si)/n(Ti) ratios and tunable pore diameters are prepared through direct synthesis under various hydrochloric acid concentrations and synthetic temperatures. The structures and the textural parameters of the materials were investigated by powder X-ray diffraction and nitrogen adsorption/desorption measurements.

X-rays, X-ray diffraction, Titanium compounds, Structure

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Gas solubility in hydrophobic confinement

Article Abstract:

A study on adsorption of atmospheric gases N(sub 2) and CO(sub 2) in hydrophobic confinements to shed light on the effects of dissolved gases on measured hydrophobic forces and possible water depletion on hydrophobic surfaces is performed. It is revealed that no short-range gas effects hydrophobic force even when the effect is very strong in the long-range regime.

Hydrophobic effect, Atmospheric gases

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