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Title: Heat capacity and heat of dissociation of methane hydrates: a new approach

Abstract

The author has developed a new method for determining the heat capacity of pure gas hydrates. This method circumvents both of the major problems which arise in the measurement of high pressure gas hydrate heat capacity. These problems are, (1) the inability to create a perfect hydrate sample and (2) the effect of incidental hydrate dissociation during a heat capacity experiment. This new technique has been used to determine the constant-volume heat capacity of methane hydrates from 245 K to 259 K. When applied to data taken by a differential scanning calorimeter, it yielded values which were accurate to between 10 and 20% for pure, one-phase hydrate heat capacity. The calorimeter itself severely limited the accuracy of the general procedure. The author has also determined the saturation and constant-volume heat capacities of liquid carbon dioxide from 235 K to 285 K using a technique similar to that developed for the hydrates. The results of this determination compare very favorably with data obtained from a constant-volume adiabatic calorimeter. htis technique may be easily extended to other pure liquid-vapor systems of high or low vapor pressure. The author has obtained the first measurements for the average heat of dissociation of methane hydratemore » above the ice point. These measurements were also made with a differential scanning calorimeter.« less

Authors:
Publication Date:
Research Org.:
Colorado School of Mines, Golden (USA)
OSTI Identifier:
5211763
Resource Type:
Book
Resource Relation:
Other Information: Thesis
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; GAS HYDRATES; DISSOCIATION HEAT; SPECIFIC HEAT; ACCURACY; CALORIMETERS; CARBON DIOXIDE; MEASURING METHODS; METHANE; ALKANES; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; ENTHALPY; HYDRATES; HYDROCARBONS; MEASURING INSTRUMENTS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REACTION HEAT; THERMODYNAMIC PROPERTIES; 033000* - Natural Gas- Properties & Composition

Citation Formats

Rueff, R M. Heat capacity and heat of dissociation of methane hydrates: a new approach. United States: N. p., 1985. Web.
Rueff, R M. Heat capacity and heat of dissociation of methane hydrates: a new approach. United States.
Rueff, R M. Tue . "Heat capacity and heat of dissociation of methane hydrates: a new approach". United States.
@article{osti_5211763,
title = {Heat capacity and heat of dissociation of methane hydrates: a new approach},
author = {Rueff, R M},
abstractNote = {The author has developed a new method for determining the heat capacity of pure gas hydrates. This method circumvents both of the major problems which arise in the measurement of high pressure gas hydrate heat capacity. These problems are, (1) the inability to create a perfect hydrate sample and (2) the effect of incidental hydrate dissociation during a heat capacity experiment. This new technique has been used to determine the constant-volume heat capacity of methane hydrates from 245 K to 259 K. When applied to data taken by a differential scanning calorimeter, it yielded values which were accurate to between 10 and 20% for pure, one-phase hydrate heat capacity. The calorimeter itself severely limited the accuracy of the general procedure. The author has also determined the saturation and constant-volume heat capacities of liquid carbon dioxide from 235 K to 285 K using a technique similar to that developed for the hydrates. The results of this determination compare very favorably with data obtained from a constant-volume adiabatic calorimeter. htis technique may be easily extended to other pure liquid-vapor systems of high or low vapor pressure. The author has obtained the first measurements for the average heat of dissociation of methane hydrate above the ice point. These measurements were also made with a differential scanning calorimeter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Book:
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