In situ diamond-anvil cell observations of methanogenesis at high pressures and temperatures (Record no. 170793)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 01931nab a2200205 4500 |
| 008 - CÓDIGOS DE INFORMACIÓN DE LONGITUD FIJA - INFORMACIÓN GENERAL | |
| Campo de control de longitud fija | 260224s2009 xxu |
| 245 00 - TITULO | |
| Título | In situ diamond-anvil cell observations of methanogenesis at high pressures and temperatures |
| 260 ## - PUBLICACION, DISTRIBUCION, ETC | |
| Lugar de publicación, distribución, etc. | |
| Nombre de publicador, distribuidor, etc. | |
| Fecha de publicación, distribución, etc. | nov./dic. 2009 |
| 270 ## - FECHA DE CARGA | |
| Fecha de carga | 08/06/2010 ; 08/06/2010 |
| 300 ## - DESCRIPCION FISICA | |
| Otra extensión | 8 p. ; 5571-5579 |
| 520 ## - RESUMEN, ETC | |
| Resumen | Transcripción del resumen del autor. In situ high pressure-temperature (P-T) measurements on C-H-O fluids at lower crust and upper mantle conditions have been performed to assess the extent and limit of methane generation within the Earth. Experiments were conducted using diamond-anvil cells at temperatures from 250 to >1500 °C and pressures between 1 and 8 GPa, assuming conditions along a subduction-setting geotherm. In many experiments, methanogenesis is observed, in particular, in those experiments in which elemental carbon or reduced transition metals (e.g., Fe0) were present. The direct reduction of CO2 to methane was not observed under any set of conditions. Methanogenesis is sensitive to C-H-O fluid composition and, specifically, the activity of H2. Kinetic barriers to direct hydrogenation of CO persists over the range of conditions explored, and hydrogenated transition-metal carbonyl species likely play a critical role in methane formation. Surprisingly, the direct hydrogenation of graphite yields considerable methane. The observation of both CO2 and H2 generation during high T and P reactions of ferrous oxide, calcium carbonate, and water indicates that methanogenesis in the lower crust and upper mantle is plausible; however, the absolute yield of methane is strongly controlled by the activity of H2. |
| 581 ## - ESTADO DE COLECCIÓN | |
| Estado de colección | 6 |
| 773 0# - CORRECCIÓN | |
| Título | Energy & fuels |
| Partes relacionadas | 23 |
| 942 ## - DESC. DE MATERIAL | |
| Tipo de item KOHA | Artículo de Revista |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Sharma, Anurag |
| 9 (RLIN) | 42287 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Cody, George D. |
| 9 (RLIN) | 42288 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Hemley, Russell J. |
| 9 (RLIN) | 42289 |
| Biblioteca propietaria | Biblioteca actual | Fecha de adquisición | Inventario | Total de préstamos | Inventario | Fecha de carga | Tipo de item KOHA |
|---|---|---|---|---|---|---|---|
| Biblioteca Alejandro Angel Bulgheroni | Biblioteca Alejandro Angel Bulgheroni | 05/03/2026 | 200045647 | 200045647 | 05/03/2026 | Artículo de Revista |
