In this communication, a thermodynamic model is presented to predict the dissociation conditions of structure H (sH) clathrate hydrates with methane as help gas. This approach is an extension of the Klauda and Sandler fugacity model (2000) for prediction of phase boundaries of sI and sII clathrate hydrates. The phase behavior of the water and hydrocarbon system is modeled using the Peng-Robinso...

In the title compound, C(6)H(5)Cl(3)N(+)·ClO(4) (-)·C(12)H(24)O(6), the perchlorate anion is disordered over two orientations in a 0.666 (17):0.334 (17) ratio. The ammonium group of the organic cation inserts into the crown ether ring and forms three bifurcated N-H⋯(O,O) hydrogen bonds to generate a supra-molecular complex. The macrocycle has approximate D(3d) local symmetry.

The authors use inelastic neutron scattering to show that the lattice anharmonicity in a single crystal of complex type-I clathrate structure depends on transverse versus longitudinal phonon polarizations.

Clathrate hydrates (CHs) are one of the most promising molecular structures in applications gas capture and storage, separations. Fundamental knowledge mechanical characteristics CHs is crucial importance for assessing storage separations at cold conditions, as well understanding their stability formation mechanisms. Here, tensile properties structural I encapsulating a variety guest species (C...