A Phase Equilibrium Model for Gas Hydrates Considering Pore-Size Distribution of Sediments

The phase equilibrium condition for gas hydrates has been an important and difficult subject in gas hydrate-related research. In this paper, the mechanism of the effect of pore-size distribution on the phase equilibrium is first explored and the concept of effective pore radius is proposed. Using information on the pore-size distribution of sediments, a relationship between hydrate saturation and effective pore radius is developed. Combined with the van der Waals-Platteeuw model, this relationship was then used to develop a new phase equilibrium model for gas hydrates in sediments, which can properly account for the effect of pore-size distribution. In contrast to the traditional models, this new model does not represent a curve on the p-T plane but instead addresses the relationship between the temperature, pressure, and hydrate saturation. Such a feature allows the new model to take into account the effect of pore-size distribution on the phase equilibrium while treating the formation and/or dissolution processes of gas hydrates in pores more realistically. The simulated results were compared with the experimental data available in literature showing that the new model gives better results compared with the other traditional models. Given the temperature and the pore pressure, the hydrate saturation can be determined using the proposed model. Therefore, the new model can be used to estimate the amount of hydrate resources in the field

George Argus’s list of Salix references

This bibliographical list, containing more than 3600 publications related to the genus Salix, was compiled by Dr. Argus during his long scientific career

Ernst Fuchs (1851-1930) and the Worldwide Renown of the Vienna School of Ophthalmology around 1900

By presenting documents and original photographs of the ophthalmologist Ernst Fuchs his life and scientific work are presented in a way never done before. German Version: http://e-book.fwf.ac.at/o:1551 English Version: http://e-book.fwf.ac.at/o:1773Anhand von bisher größtenteils noch niemals veröffentlichten Originaldokumenten und -abbildungen werden Leben und wissenschaftliches Wirken des Ophthalmologen Ernst Fuchs dargestellt. Ernst Fuchs war um 1900 nicht nur der bedeutendste österreichische Ophthalmologe, sondern genoss auch international hohes Ansehen. Er führte die Wiener ophthalmologische Schule zu seiner Zeit zu Weltruf. Deutsche Version: http://e-book.fwf.ac.at/o:1551 Englische Version: http://e-book.fwf.ac.at/o:177

Ernst Fuchs (1851-1930) and the Worldwide Renown of the Vienna School of Ophthalmology around 1900

By presenting documents and original photographs of the ophthalmologist Ernst Fuchs his life and scientific work are presented in a way never done before. German Version: http://e-book.fwf.ac.at/o:1551 English Version: http://e-book.fwf.ac.at/o:177

Annual Report of the Board of Regents of the Smithsonian Institution, showing the operations; expenditures, and condition of the Institution to July, 1888

Annual Report of the Smithsonian Institution. 1 July. HMD 142 (pts. 1 and 2) , 50-2, v14-15, 177 8p. [2668-2669] Research related to the North American Indian

Detrital Mineral U/Pb Age Dating and Geochemistry of Magmatic Products in Basin Sequences

Dating and geochemical analyses of detrital minerals (mainly zircons) combined with traditional methods, such as heavy minerals and sandstone modes, are a powerful tool in paleogeographic and paleotectonic research and industrial applications

Faculty Publications and Creative Works 2003

Faculty Publications & Creative Works is an annual compendium of scholarly and creative activities of University of New Mexico faculty during the noted calendar year. It serves to illustrate the robust and active intellectual pursuits conducted by the faculty in support of teaching and research at UNM

Elemental Concentration and Pollution in Soil, Water, and Sediment

This book, entitled “Elemental Concentration and Pollution in Soil, Water, and Sediment”, presents an updated overview of the main trace elements in living organisms. This collection brings researchers from different fields together, including those from biogeochemistry and ecotoxicology in various environmental media, in order to provide a more comprehensive understanding of the environmental fate of trace elements in their biogeochemical cycles for different ecosystems