Advances in the Study of Gas Hydrates - download pdf or read online

By Charles E. Taylor, Jonathan T. Kwan

ISBN-10: 0306484811

ISBN-13: 9780306484810

ISBN-10: 0306486458

ISBN-13: 9780306486456

This publication had its genesis in a symposium on fuel hydrates offered on the 2003 Spring nationwide assembly of the yankee Institute of Chemical Engineers. The symposium consisted of twenty papers offered in 4 periods over days. extra visitor authors have been invited to supply continuity and canopy subject matters no longer addressed throughout the symposium. gasoline hydrates are a different category of chemicals the place molecules of 1 compound (the visitor fabric) are enclosed, with no bonding chemically, inside of an open reliable lattice composed of one other compound (the host material). a majority of these configurations are often called clathrates. The visitor molecules, u- best friend gases, are of a suitable dimension such that they healthy in the cage shaped through the host fabric. Commonexamples of gasoline hydrates are carbon dioxide/water and methane/water clathrates. At commonplace strain and temperature, methane hydrate includes via quantity one hundred eighty occasions as a lot methane as hydrate. the U.S. Geological Survey (USGS) has anticipated that there's extra natural carbon c- tained as methane hydrate than all other kinds of fossil fuels mixed. in reality, methane hydrates may provide a fresh resource of strength for a number of centuries. Clathrate compounds have been first came upon within the early 1800s whilst Humphrey Davy and Michael Faraday have been experimenting with chlorine-water combos.

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Example text

The model indicated increasing rate of reaction with time, while the experimental data did not reflect such behavior. , [7,8]), Skovborg and Rasmussen [7] noticed that the reaction rate was constant or, in some cases had a declining tendency. The transfer of gas from the gas phase to or through the liquid phase was considered to be the determining step. The discrepancies between experimental data and the Englezos, et al. model is because the total reaction rate was assumed proportional to the second moment of the particle size distribution, which in effect determines the total surface area of the particles.

Using the external circulating temperature bath, the temperature of the water in the cell is gradually lowered until formation of the methane hydrate is observed. Then, the temperature of the cell is lowered to approximately –10° C and held constant as the unabsorbed methane is released from 36 M. Carolina Gonzalez Chacin et al. the cell. The cell is finally allowed to warm slowly to a temperature between 10° C and room temperature, which causes the hydrate to release its absorbed methane gas. 1.

The hydrate-bearing layer overlies a free gas zone similar to that of the Messoyakha field in Siberia [7]. Figure 1 shows a schematic diagram of hydrate stability zone in the reservoir of our interest, where the interface separating the hydrate layer from the free-gas zone is at equilibrium. 03 K/m. The reservoir of this study is assumed to cover 10m above and 10 m below the hydrate-free-gas interface. 15 K. These initial conditions represent a typical case where the depth of methane-hydrate occurrence is about 680 m below ground surface in a permafrost region.

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Advances in the Study of Gas Hydrates by Charles E. Taylor, Jonathan T. Kwan

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