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Download Natural Gas Hydrate in Oceanic and Permafrost Environments by Michael D. Max PDF

By Michael D. Max

This is often the 1st publication released at the rising examine box of obviously happening fuel hydrates (focusing on methane hydrate) that's not essentially a actual chemistry textbook. This booklet is designed as a huge advent to the sector of hydrate technology, demonstrating the importance of the hydrate cycle to power source strength, seafloor balance, and worldwide weather and weather switch, besides different concerns. the simplest recognized hydrate localities are defined, as are study and laboratory equipment and effects. The booklet involves chapters grouped in comparable topics that current up to date details on methane hydrate. all the contributing authors is professional in hydrate technological know-how and such a lot were engaging in study in hydrate for a substantial time. viewers: This publication might be a tremendous resource of knowledge for marine geologists, geophysicists, geochemists, and petroleum geologists and regulators. it's also meant as a graduate-level textbook.

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Example text

Clearly, equation (8), when converted to pressure, is the closest extrapolation to the freshwater data from equation (9) adjusted to seawater. 3. Gibbs Free Energy Minimizations Several methods to estimate the P-T conditions of methane hydrate stability by searching for the state which minimizes the Gibbs Free Energy of the system have been developed. These programs are computationally intensive and require sophisticated computer programming. However, computer programs to carry-out these calculations are now readily available.

64 x 10"5 (log10P)2. (7) Pressure [MPa] This equation reveals significant curvature for even this limited temperature range (Fig. 2). When plotted in linear temperature vs pressure space, the offset between the data and equation (5) becomes more apparent (Fig. 3). Temperature [0C] Figure 3. Plot of data from Dickens and Quinby-Hunt (1994) in linear temperature and pressure space; the linear fit (—) to equation (5) and the second order polynomial fit (—) to equation (7) are also shown. 5°C), it is poorest at the ends of the line as well as at the mid-point of the data.

Whether this is sufficient to destabilize the sediments and cause seafloor collapse remains to be seen. 2. Blake Ridge Recently, Ruppel (1997) has pointed-out that when the in situ temperature gradient and the stability boundary for methane hydrate are plotted together, the geotherm and the stability boundary do not intersect at the depth of the bottomsimulating reflector (BSR) for several sites on the Blake Ridge. , 1970). The fact that it does not presents an interesting geochemical conundrum.

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