Mathematics – Logic
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.2411g&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 50, Issue 11, pp.2411-2418
Mathematics
Logic
Scientific paper
In order to assess the possible role of methane in petroleum formation, we studied the reaction of methane with liquid hydrocarbons representing the three main classes of compounds dominant in crude oil. The experimental reaction conditions simulated those of a geological setting for petroleum formations, at 1000 atm and 150-250°C in the presence of montmorillonite, a natural clay catalyst. Since we expected very slow reaction rates and thus low yields, we used 14 C labeled methane to trace the reaction products. We report here the detection of ethylbenzene and ethyltoluene formed by the interaction of methane with benzene and toluene, respectively. Instead of methylation of benzene, predominantly C 2 addition occurred, although very small amounts of products corresponding to C 1 addition were also detected. We propose that catalytic dissociation of methane occurred, forming ethylene which participated in a Friedel-Crafts type alkylation process of the aromatic ring on the catalyst surface. In addition to ring alkylation, side reactions such as polymerization of unsaturates (ethylene, acetylene) appeared to have occurred on the catalyst surface. The nature of these polymers is yet to be determined.
Bilson Elizabeth
Gold Thomas
Gordon Benjamin E.
Patnaik Pradyot
Streett William
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