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中文摘要：
热液条件下CO2和H2通过费托合成反应产生烷烃从热力学上来说是可行的，但是，前人的实验研究表明，如果没有合适的催化剂，该反应难以进行，并且烷烃产物的种类依赖于催化剂的种类和性质。在镍铁矿的催化作用下，热液中的CO2和H2能够反应形成CH4,在铬铁矿催化作用下反应能够产生CH4、C2H6和C3H8。热液条件下，CO2和H2能否反应形成碳数大于3的烷烃，还需要进一步的催化实验加以查证。本研究在300℃、30MPa条件下进行实验，以Fe、CoCl2和^13C标识的NaH^13CO3在NaCl溶液中反应。^13C同位素示踪结果表明，实验反应过程中CO2和H2反应形成了丁烷和戊烷。
英文摘要：
Hydrocarbons detected in seabed hydrothermal environments are always deemed to be of abiotic origin, and it is commonly believed that these abiotic hydrocarbons are formed from dissolved CO2 and H2 through FischerTropsch type （FTT） synthesis. It is confirmed that it is energetically feasible for CO2 and H2 to produce hydrocarbons under hydrothermal conditions, but it is difficult for them to form hydrocarbons in the absence of appropriate catalysts. Some experiments have been performed to investigate the catalyzing role of minerals for this FTT synthesis under hydrothermal conditions. The experiment results show that CH4, C2H6 and C3Hs can be formed from dissolved CO2 and H2 catalyzed by minerals such as chromite under hydrothermal conditions. In our experiment, iron, COCl2·6H2O and NaH^13CO3 reacted in NaCl solution （0.57 mol/kg） at 300 ℃ and 30 MPa in a closed hydrothermal apparatus. ^13C-labeled butane （C4H10） and pentane （C5H12） were detected in the experiment sample, and it is confirmed that butane and pentane were produced from dissolved CO2 and H2 in our experiment.
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