Experimental study and thermodynamic modeling of CCl4 + O2 and CCl4 + N2 hydrate equilibria

摘要: Abstract Nitrogen and oxygen are the main components of air. Liquid nitrogen is an alternative to fossil fuels. However, little attention has been paid this energy resource. not a fuel in itself, however, it can be used as oxidizer run vehicles. In respect, gas hydrate technology interest, applicable media for nitrogen/oxygen transport or separation. Both have tendency form hydrates, especially at high pressures, with double occupancy large cavities structure sII. Thermodynamic promoters (THPs) facilitate formation hydrates more moderate equilibrium conditions. For purpose, CCl4 potential candidate. contribution, conditions binary mixtures nitrogen + CCl4 (50 data points) oxygen + CCl4 (41 were experimentally measured. This was done using three different experimental equipment, namely: tensimeter, Cailletet apparatus, high-pressure autoclave. A thermodynamic model, according van der Waals-Platteeuw (vdW-P) solid solution theory, then employed predict temperatures aforementioned mixtures. The fugacities calculated through Peng-Robinson (PR) EoS classical Waals mixing rules. Kihara model applied represent guest-host interactions. results reveal that ability average absolute deviation (AAD) 0.32 K. fractional calculations indicate molecules mostly occupy cages do enter small sII because their size, while contributions filling