Journal ArticleDOI
Equilibrium Data and Thermodynamic Modeling of Nitrogen, Oxygen, and Air Clathrate Hydrates
Reads0
Chats0
TLDR
In this article, the experimental data on methane, nitrogen, oxygen, and air hydrates were used in optimizing the Kihara potential parameters for oxygen hydrate, and the hydrate stability zone of oxygen and nitrogen was predicted.Abstract:
Air hydrates can form at high-pressure and low-temperature conditions found in deep ice sheets of Arctic and Antarctic regions. These hydrates can play a major role in analyzing the data gathered in these regions. However, there are limited experimental data and thermodynamic modeling on air hydrates. In this work, we present new experimental data on methane, nitrogen, oxygen, and air hydrates. An experimental setup based on a quartz crystal microbalance (QCM) has been used in measuring all the experimental data reported in this work. The QCM method needs much smaller samples, resulting in a significant reduction in the time required for each experiment. The available data on oxygen hydrates are used in optimizing the Kihara potential parameters for oxygen hydrates. Using the previously reported nitrogen Kihara potential parameters and the optimized Kihara potential parameters for oxygen, the hydrate stability zone of air hydrates (21 mol % oxygen and 79 mol % nitrogen) has been predicted. The predictions...read more
Citations
More filters
Journal ArticleDOI
High-pressure fluid-phase equilibria: Experimental methods and systems investigated (2000-2004)
TL;DR: In this article, a review of high-pressure phase equilibria is presented, for which experimental high pressure phase-equilibrium data were published in the period between 2005 and 2008, continuing a series of reviews.
Journal ArticleDOI
Phase equilibrium modeling of clathrate hydrates of methane, carbon dioxide, nitrogen, and hydrogen + water soluble organic promoters using Support Vector Machine algorithm
Ali Eslamimanesh,Farhad Gharagheizi,Mohammad Illbeigi,Amir H. Mohammadi,Amir H. Mohammadi,Alireza Fazlali,Dominique Richon +6 more
TL;DR: In this article, the Least Squares Support Vector Machine (LSSVM) algorithm is employed to present several numerical models for calculation/estimation of the clathrate hydrate dissociation conditions of methane, carbon dioxide, nitrogen, and hydrogen in the presence of three most-widely used water “soluble” organic promoters including tetrahydrofuran (THF), 1,4-dioxane, and acetone.
Journal ArticleDOI
Origin of molecular oxygen in comet 67P/Churyumov–Gerasimenko
O. Mousis,Thomas Ronnet,B. Brugger,Ozge Ozgurel,Françoise Pauzat,Yves Ellinger,Romain Maggiolo,Peter Wurz,Pierre Vernazza,Jonathan I. Lunine,Adrienn Luspay-Kuti,Kathleen Mandt,Kathrin Altwegg,André Bieler,Alexis Markovits,Martin Rubin +15 more
TL;DR: In this article, the radiolysis of icy grains in low-density environments such as the presolar cloud may induce the production of large amounts of molecular oxygen, and it is shown that molecular oxygen can be efficiently trapped in clathrates formed in the protosolar nebula (PSN), and that incorporation as crystalline ice is highly implausible, because this would imply much larger abundances of Ar and N-2 than those observed in the coma.
Journal ArticleDOI
Determining phase diagrams of tetrahydrofuran+methane, carbon dioxide or nitrogen clathrate hydrates using an artificial neural network algorithm
TL;DR: In this paper, a feed-forward artificial neural network algorithm was developed for estimating dissociation pressures of the binary clathrate hydrates of tetrahydrofuran+methane, carbon dioxide or nitrogen.
Journal ArticleDOI
Ice−Clathrate Hydrate−Gas Phase Equilibria for Air, Oxygen, Nitrogen, Carbon Monoxide, Methane, or Ethane + Water System†
TL;DR: In this article, the authors compared the equilibrium conditions of air, oxygen, nitrogen, and carbon monoxide clathrate hydrates and showed that the existing ice−clathrate hydrate−gas equilibrium data for the nitrogen or oxygen + water system are not reliable.
References
More filters
Journal ArticleDOI
Low-pressure solubility of gases in liquid water
Journal ArticleDOI
Dissociation Pressures of Gas Hydrates Formed by Gas Mixtures
W. R. Parrish,J. M. Prausnitz +1 more
Journal ArticleDOI
Thermodynamic and Molecular Properties of Gas Hydrates from Mixtures Containing Methane, Argon, and Krypton
TL;DR: In this article, the authors used experimental methane-krypton and methane-argon hydrate data to generate chemical-potential, enthalpy, and heat-capacity functions for Structure I hydrates for temperatures between -190/sup 0/ and 80/Sup 0/F (150 and 300 K) using a modified statistical model where the gas-water interactions were calculated from the spherical core Kihara intermolecular pair potential function.