Isotopic fractionation of oxygen and hydrogen in water caused by gas hydrate formation was investigated experimen-tally. Two different gas hydrates in structures, Structure I hydrate and Structure II hydrate, were formed with methane and krypton gases in a NaCl solution. Isotopic fractionation durin...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.454.512 2023-05-15T17:11:59+02:00 The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.454.512 http://www.terrapub.co.jp/journals/GJ/pdf/3802/38020129.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.454.512 http://www.terrapub.co.jp/journals/GJ/pdf/3802/38020129.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.terrapub.co.jp/journals/GJ/pdf/3802/38020129.pdf gas hydrate methane hydrate clathrate hydrate isotopic fractionation text 2002 ftciteseerx 2016-01-08T06:06:01Z Isotopic fractionation of oxygen and hydrogen in water caused by gas hydrate formation was investigated experimen-tally. Two different gas hydrates in structures, Structure I hydrate and Structure II hydrate, were formed with methane and krypton gases in a NaCl solution. Isotopic fractionation during gas hydrate formation was observed by measuring oxygen and hydrogen isotopic compositions in the solutions sampled before and after gas hydrate formation. Heavy isotopes of oxygen and hydrogen in water were depleted in the solution resulting from that those isotopes were concentrated in the gas hydrate. The isotopic fractionation was larger as increasing amounts of gas hydrates that were calculated from both the decrease of gas pressure and increase of NaCl concentration in solution. The isotopic fractionation factors of oxygen and hydrogen in water between gas hydrate and liquid water were determined to be 1.0023–1.0032 and 1.014–1.022, respectively. The significant difference of the gas hydrate structures was not observed beyond the analytical errors. These factors are similar to those between ice and liquid water. Text Methane hydrate Unknown |
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English |
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gas hydrate methane hydrate clathrate hydrate isotopic fractionation |
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gas hydrate methane hydrate clathrate hydrate isotopic fractionation |
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gas hydrate methane hydrate clathrate hydrate isotopic fractionation |
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Isotopic fractionation of oxygen and hydrogen in water caused by gas hydrate formation was investigated experimen-tally. Two different gas hydrates in structures, Structure I hydrate and Structure II hydrate, were formed with methane and krypton gases in a NaCl solution. Isotopic fractionation during gas hydrate formation was observed by measuring oxygen and hydrogen isotopic compositions in the solutions sampled before and after gas hydrate formation. Heavy isotopes of oxygen and hydrogen in water were depleted in the solution resulting from that those isotopes were concentrated in the gas hydrate. The isotopic fractionation was larger as increasing amounts of gas hydrates that were calculated from both the decrease of gas pressure and increase of NaCl concentration in solution. The isotopic fractionation factors of oxygen and hydrogen in water between gas hydrate and liquid water were determined to be 1.0023–1.0032 and 1.014–1.022, respectively. The significant difference of the gas hydrate structures was not observed beyond the analytical errors. These factors are similar to those between ice and liquid water. |
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2002 |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.454.512 http://www.terrapub.co.jp/journals/GJ/pdf/3802/38020129.pdf |
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Methane hydrate |
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Methane hydrate |
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http://www.terrapub.co.jp/journals/GJ/pdf/3802/38020129.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.454.512 http://www.terrapub.co.jp/journals/GJ/pdf/3802/38020129.pdf |
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