Web of Science: 8 cites, Scopus: 8 cites, Google Scholar: cites,
Study of Fischer-Tropsch-type reactions on chondritic meteorites
Cabedo, V. (Institut de Ciències de l'Espai)
Llorca, Jordi (Universitat Politècnica de Catalunya. Departament d'Enginyeria Química)
Trigo Rodríguez, Josep Maria (Institut d'Estudis Espacials de Catalunya)
Rimola, Albert (Universitat Autònoma de Barcelona. Departament de Química)

Data: 2021
Resum: Context. How simple organic matter appeared on Earth and the processes by which it transformed into more evolved organic compounds, which ultimately led to the emergence of life, is still an open topic. Different scenarios have been proposed, the main one assumes that simple organic compounds were synthesized, either in the gas phase or on the surfaces of dust grains, during the process of star formation and they were incorporated into larger bodies in the protoplanetary disk. The transformation of these simple organic compounds in more complex forms is still a matter of debate. Recent discoveries have pointed to catalytic properties of dust grains present in the early stellar envelope, which can nowadays be found in the form of chondrites. The significant infall of chondritic meteorites during the early periods of Earth suggests that the same reactions could have taken place in certain environments on the Earth's surface, with conditions more favorable for organic synthesis. Aims. This work attempts to synthesize simple organic molecules, such as hydrocarbons and alcohols via Fischer-Tropsch-type reactions supported by different chondritic materials under early-Earth conditions, to investigate if organic synthesis can likely occur in this environment and to determine what the differences are in selectivity when using different types of chondrites. Methods. Fischer-Tropsch-type reactions are investigated from mixtures of CO and H2 at 1 atm of pressure on the surfaces of different chondritic samples. The different products obtained are analyzed in situ by gas chromatography. Results. Different Fischer-Tropsch reaction products are obtained in quantitative amounts. The formation of alkanes and alkenes being the main processes. The formation of alcohols also takes place in a smaller amount. Other secondary products were obtained in a qualitative way. Conclusions. Chondritic material surfaces have been proven as good supports for the occurrence of organic synthesis. Under certain circumstances during the formation of Earth, they could have produced a suitable environment for these reactions to occur.
Ajuts: Agencia Estatal de Investigación PGC2018-097374-B-I00
Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-128
Agencia Estatal de Investigación CTQ2017-89132-P
Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1323
European Commission 865657
Nota: Altres ajuts: ICREA Academia program
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: Article ; recerca ; Versió publicada
Matèria: Astrochemistry ; Meteorites ; Meteors ; Meteoroids ; Planetary nebulae
Publicat a: Astronomy & astrophysics, Vol. 650 (June 2021) , art. A160, ISSN 1432-0746

DOI: 10.1051/0004-6361/202039991


23 p, 2.8 MB

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