TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The method further involves removing contaminants from the natural gas stream; passing at least a portion of the product stream to a separator in which some carbon dioxide or hydrogen is removed; conveying hydrogen to a fuel cell or turbine; providing oxygen to the fuel cell or turbine; reacting the hydrogen with the oxygen in the fuel cell or burning the hydrogen with the oxygen in the turbine to produce electricity; heating the water produced in the fuel cell or turbine to form steam; generating electricity from the steam; passing at least a portion of the hydrogen to the reactor such that the burn stream comprises the removed hydrogen; introducing water, steam, or both to the reactor; reacting at least a portion of the reactive products with the hydrogen to form ethylene; separating the hydrogen from the hydrocarbon liquids; providing oxygen to fuel a cell or turbine; reacting the hydrogen with the oxygen in the fuel cell or burning the hydrogen with the oxygen in the turbine to produce electricity; separating at least a portion of the hydrogen from the hydrocarbon liquids; passing at least a portion of the hydrogen back to the reactor such that the hydrogen comprises all or part of the burn stream; separating a vapor stream from the hydrocarbon liquids; conveying at least a portion of the vapor stream to the reactor (preferably catalytic liquefaction reactor); using at least a portion of the vapor stream to at least partially quench the product stream comprising reactive products; separating a liquid stream from the hydrocarbon liquids; using at least a portion of the liquid stream to at least partially quench the product stream comprising reactive products; separating a combustible gas or vapor from the process and using the gas or vapor as fuel; separating a gas or vapor from the process and using the gas or vapor to generate electricity; separating a combustible liquid or slurry from the process and using the liquid or slurry as fuel; segregating of portion of the natural gas stream to form an electrical generation stream; conveying the electrical generation stream to a fuel cell or turbine; providing oxygen to the fuel cell or turbine; and reacting the electrical generation stream with the oxygen in the fuel cell or the turbine to generate electricity. The pressure of the natural gas stream is 1-20 bar. The feed stream is preheated to 400-1800K. The feed stream is maintained to at least 400K for 0.1-100 (preferably 0.2-10) milliseconds. The burn stream and oxidant is preheated to a temperature of 400-1800K. The catalytic liquefaction reactor is operated at 300-1000K. The product stream is quenched using a device selected from a Joule-Thompson expander, nozzle, turbo expander, water spray, hydrocarbon spray, oil spray, steam, boiler, and/or heat exchanger. The product stream is quenched by mixing the product stream with vapor or liquid hydrocarbons. Preferred Components: The fuel cell or turbine produces heat and water. The catalytic liquefaction reactor comprises an acid catalyst. The burn stream comprises a portion of the natural gas stream.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The oxidant comprises oxygen. The oxygen is supplied from a source selected from oxygen, purified oxygen, air, and oxygen-enriched air. EXAMPLE - No suitable example is given.