Journal ArticleDOI
Occurrence of methane hydrate in saturated and unsaturated solutions of sodium chloride and water in dependence of temperature and pressure
TLDR
In this paper, experimental results of the formation of methane hydrate in dependence of temperature and pressure in unsaturated solutions of NaCl in water were presented in a temperature range from 261.85 to 285.98 K and pressure up to 11.0 MPa.Abstract:
Experimental results of the formation of methane hydrate in dependence of temperature and pressure in unsaturated solutions of NaCl in water will be presented in a temperature range from 261.85 to 285.98 K and pressure up to 11.0 MPa. Furthermore the four-phase equilibrium NaCl X 2H/sub 2/O /SUB s/ -CH/sub 4/ X nH/sub 2/O /SUB s/ -L-G has been calculated from the experimental results. Also the heats of transformation of several other equilibria in the ternary system CH/sub 4/-H/sub 2/O-NaCl are obtained.read more
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Journal ArticleDOI
Physical properties of hydrate-bearing sediments
William F. Waite,J. C. Santamarina,Douglas D. Cortes,Brandon Dugan,David N Espinoza,John T. Germaine,Jaewon Jang,Jongwon Jung,Timothy J. Kneafsey,H. Shin,Kenichi Soga,William J. Winters,Tae Sup Yun +12 more
TL;DR: A review of the current understanding of phenomena involved in gas hydrate formation and the physical properties of hydrate-bearing sediments can be found in this paper, where the magnitudes and interdependencies of these properties are critically important for predicting and quantifying macroscale responses of hydrates to changes in mechanical, thermal, or chemical boundary conditions.
Journal ArticleDOI
Formation of natural gas hydrates in marine sediments 1. Conceptual model of gas hydrate growth conditioned by host sediment properties
TL;DR: In this paper, the authors assume that gas hydrate behaves in a way analogous to ice in a freezing soil, and they predict that gas hydrates in a sequence of fine-grained sediments are inhibited by reduced pore water activity in the vicinity of hydrophilic mineral surfaces, and the excess internal energy of small crystals confined in pores.
Journal ArticleDOI
Measurement of Clathrate Hydrates via Raman Spectroscopy
TL;DR: Raman spectra of clathrate hydrate guest molecules are presented for three known structures (I (sI), II (sII), and H (sH)) in the following systems:
Journal ArticleDOI
Predicting the occurrence, distribution, and evolution of methane gas hydrate in porous marine sediments
Wenyue Xu,Carolyn D. Ruppel +1 more
TL;DR: In this paper, a new analytical formulation was proposed to solve the coupled momentum, mass, and energy equations that govern the evolution and accumulation of methane gas hydrate in marine sediments and derive expressions for the locations of the top and bottom of the hydrate stability zone, the position of actual hydrate occurrence, the timescale for hydrate accumulation in sediments, and the rate of accumulation as a function of depth in diffusive and advective end member systems.
Journal ArticleDOI
Fluid and chemical fluxes in and out of sediments hosting methane hydrate deposits on Hydrate Ridge, OR, I: Hydrological provinces
Marta E Torres,James McManus,Douglas E. Hammond,M.A. de Angelis,Katja U Heeschen,S.L. Colbert,Michael D. Tryon,Kevin M. Brown,Erwin Suess +8 more
TL;DR: In this paper, the authors identify three distinct active fluid regimes at Hydrate Ridge, where the bulk of the flow occurs through channels in which gas velocities reach 1 m s−1.