Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of Fischer-Tropsch Type reactions on chondritic meteorites   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 were incorporated into larger bodies in the
protoplanetary disk. Transformation of these simple organic compounds in more
complex forms is still a matter of debate. Recent discoveries point out to
catalytic properties of dust grains present in the early stellar envelope,
which can nowadays be found in the form of chondrites. The huge infall of
chondritic meteorites during the early periods of Earth suggests that the same
reactions could have taken place in certain environments of the Earth surface,
with conditions more favorable for organic synthesis. This work attempts the
synthesis of 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 which are the differences in selectivity when
using different types of chondrites. 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. Different Fischer-Tropsch reaction products are
obtained in quantitative amounts. The formation of alkanes and alkenes being
the main processes. Formation of alcohols also takes place in a smaller amount.
Other secondary products were obtained in a qualitative way.

35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int