TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The method, further comprises removing contaminants from the natural gas stream; providing a second feed stream comprising a portion of the natural gas stream and/or a portion of a stream separated from the process; conveying the second feed stream to a reaction section of the reactor where the second feed stream is heated by intimate mixing with the feed stream to a temperature and for a time sufficient so that reactive products comprising acetylene and/or ethylene are produced; separating carbon dioxide from at least one source within the process, which is a portion of the reactive product stream, a portion of the light gas stream, a portion of the light gas stream after some ethylene has been removed, a portion of the light gas stream after some hydrogen has been removed, a portion of the hydrogenation reactor effluent and the hydrocarbon liquid; separating hydrogen from at least one source within the process, which is a portion of the reactive product stream, a portion of the alternate reactive produce stream, a portion of the light gas stream, a portion of the light gas stream after some ethylene has been removed, a portion of the light gas stream after some carbon dioxide has been removed, a portion of the light gas stream after some ethylene and carbon dioxide have been removed, a portion of the hydrogenation reactor effluent and a portion of the hydrocarbon liquids; separating hydrogen from the process and using a portion of the hydrogen for the at least one purpose, which is recirculating back to the reactor, conveying to the hydrogenation reactor, generating electricity directly or indirectly, burning as fuel and exporting from the process for external use; segregating a portion of the natural gas stream for use in generating electricity directly or indirectly; separating a gas or vapor from the hydrocarbon liquids and recirculating a portion of the gas or vapor to the reactor or to the catalytic liquefaction reactor; separating a gas or vapor from the hydrocarbon liquids and using at least a portion of the gas or vapor stream to at least partially quench the reactive product stream; separating a liquid from the hydrocarbon liquids and using a least a portion of the liquid to at least partially quench the reactive product streams; separating a combustible gas or vapor from the process and using the gas or vapor as fuel or to generate electricity; and separating a combustible liquid or slurry from the process and using the liquid or slurry as fuel. The feed stream is heated and not reacted, partially reacted or completely reacted before mixing with the second feed stream. The reactive products produced from the second feed stream are mixed with the reactive products produced from the feed stream to form an alternate reactive product stream. The pressure of the natural gas stream is 1-20 bar. The natural gas stream is preheated to a temperature of 400-1800K. The feed stream is preheated to a temperature of 400-1800K. The feed stream is maintained at a temperature of at least 400K for 0.1-100 milliseconds. The temperature in the catalytic liquefaction reactor is 300-100K. The reactive product stream is quenched at least partially by mixing the reactive product stream with vapor or liquid hydrocarbons.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Method: The natural gas stream and/or the feed stream is or are preheated by a device, which is electric arc, resistance heater, plasma generator, fuel cell, combustion heater and/or heat exchanger. The reactor product stream is quenched by a device, which is a Joule-Thomson expander, nozzle, turbo expander, water spray, hydrocarbon spray, oil spray, stream, boiler and/or heat exchanger. Preferred Components: The catalyst in the catalytic liquefaction reactor comprises an acid catalyst. EXAMPLE - No suitable example given.