Rapid thermal pyrolysis of gaseous feeds containing hydrocarbon

Details Rapid thermal pyrolysis of gaseous feeds containing hydrocarbon Rapid thermal pyrolysis of gaseous feeds containing hydrocarbon

1991-09-19

1992-11-10

Pal, Asok

Chemistry of hydrocarbon compounds

Special chemical considerations

Synthesis from methane or inorganic carbon source, e.g.,...

585402, 585500, 585503, 585700, 585910, C07C 200

Patent

active

051625997

ABSTRACT:
In its simplest sense, the present invention is directed toward a process for the thermal conversion of methane into unsaturated gaseous hydrocarbons, especially olefins, comprising first compressing methane in the presence of an inert gas having a higher ratio of heat capacities, Cp/Cv, than methane. The inert gas used is present in an amount sufficient to provide a compressed gas mixture having a peak temperature of adiabatic compression in the range of about 900.degree. C. to about 2200.degree. C. Under these conditions, at least some of the methane is converted to unsaturated gaseous hydrocarbons. Immediately thereafter, the compressed gas mixture is expanded, thereby substantially preventing thermal conversion of the gaseous hydrocarbons. Importantly, the compression and expansion are achieved in a single cycle of less than about one second.

REFERENCES:
patent: 4672144 (1987-06-01), Green
patent: 4724272 (1988-02-01), Ranisre et al.
patent: 4926001 (1990-05-01), Alagy et al.
patent: 4929797 (1990-05-01), Yamaguchi et al.

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