Estimation of Thermodynamic Stability of Methane and Carbon Dioxide Hydrates in the Presence of Hydrogen Sulfide.

This work presents the effect of hydrogen sulfide gas on the phase behavior of both methane gas hydrate formation and CO gas hydrate formation. For this, the thermodynamic equilibrium conditions for various gas mixtures containing CH/HS and CO/HS are initially found by simulation using PVTSim software. These simulated results are compared using an experimental approach and the available literature.

A prediction model to predict the thermodynamic conditions of gas hydrates.

Gas Hydrate modelling has gained huge attention in the past decade due to its increase in usage for various energy as well as environmental applications at an industrial scale. As the experimental approach is highly expensive and time-consuming, modelling is the best way to predict the conditions before the actual applications at industrial scales. The commercial software currently existing uses the equation of states (EOS) to predict the thermodynamic conditions of gas hydrates.

Effect of ammonium hydroxide-based ionic liquids' freezing point and hydrogen bonding on suppression temperature of different gas hydrates.

The study presents the effect of freezing point depression and hydrogen bonding energy interaction on four ammonium hydroxide-based ionic liquids (AHILs) of gas hydrate systems. The AHILs investigated are tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, and tetrabutylammonium hydroxide. The considered hydrate system includes methane (CH), carbon dioxide (CO), and three binary mixed gas hydrates (70-30 CO + CH, 50-50 CO + CH, 30-70 CO + CH), which are often encountered in the flow assurance pipelines.

Experimental investigation and ANN modelling on CO hydrate kinetics in multiphase pipeline systems.

Gas hydrates are progressively becoming a key concern when determining the economics of a reservoir due to flow interruptions, as offshore reserves are produced in ever deeper and colder waters. The creation of a hydrate plug poses equipment and safety risks. No current existing models have the feature of accurately predicting the kinetics of gas hydrates when a multiphase system is encountered.

Investigation on Thermodynamic Equilibrium Conditions of Methane Hydrates in Multiphase Gas-Dominant Pipelines.

The estimation of thermodynamic equilibrium conditions of methane hydrates in the presence of crude oil based on experiments is shown in this research work. This pipeline system replicated the gas-dominant multiphase transmission pipelines at deep-sea regions. An experimental study is done by the usage of a Raman gas hydrate reactor.

Phase behavior study on gas hydrates formation in gas dominant multiphase pipelines with crude oil and high CO mixed gas.

This research is focused on understanding the phase behavior of gas hydrate formation in the gas dominant multiphase pipelines containing mixed gas with high CO, crude oil, and deionized water. The experimental conditions are in the pressure range of 3-7 MPa with water cut as 20% of the volume. Initially, the effect of high CO content in natural gas on the phase boundary conditions of hydrates is studied through simulation (CSMGEM software) and experiments.