| 研究実績の概要 |
As an important component in the early earth and other planets, abiotic methane may provide the carbon source and energy for supporting the origin of evolution of life. It has also been widely observed in present natural system, however, the formation mechanism is yet controversial and inconclusive. In this study, we have applied the recently developed pared clumped isotope analytical technique in laboratory produced abiotic methane via Fischer-Tropsch Type (FTT) reaction to identify the possible reaction pathways. So far, series of FTT reactions with various conditions, such as reaction time, temperature, catalyst, isotopically distinct reactants, etc., have been carried out. By combination of clumped isotope signatures and traditional stable isotope values of methane, as well as the reaction rate, a model will be established to illustrate the detailed reaction processes. These observations are expected to be applied in understanding the formation mechanism of natural abiotic methane samples in the following study.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
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理由
Series of FTT reactions have been carried out with different experimental conditions. The isotopic signatures of produced methane, including δ13C, δD, Δ13CH3D and Δ12CH2D2, have been analyzed. Measurements of reaction rate and isotopic ratios of CO, CO2, H2, are undergoing.
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