The present invention provides a method of preparing acetylene (C.sub.2H.sub.2), the method at least comprising the steps of: a) providing a methane-containing stream; b) subjecting the methane-containing stream provided in step a) to non-catalytic pyrolysis, thereby obtaining carbon and hydrogen; c) reacting the carbon obtained in step b) with CaO, thereby obtaining CaC.sub.2 and CO; d) reacting the CaC.sub.2 obtained in step c) with H.sub.2O, thereby obtaining acetylene (C.sub.2H.sub.2) and Ca(OH).sub.2; e) decomposing the Ca(OH).sub.2 obtained in step d), thereby obtaining CaO and H.sub.2O; f) using the CaO as obtained in step e) in the reaction of step c).

The present invention provides a method of preparing acetylene (C.sub.2H.sub.2), the method at least comprising the steps of: a) providing a methane-containing stream; b) subjecting the methane-containing stream provided in step a) to non-catalytic pyrolysis, thereby obtaining carbon and hydrogen; c) reacting the carbon obtained in step b) with CaO, thereby obtaining CaC.sub.2 and CO; d) reacting the CaC.sub.2 obtained in step c) with H.sub.2O, thereby obtaining acetylene (C.sub.2H.sub.2) and Ca(OH).sub.2; e) decomposing the Ca(OH).sub.2 obtained in step d), thereby obtaining CaO and H.sub.2O; f) using the CaO as obtained in step e) in the reaction of step c).

The present invention is concerned with a method of production of acetylene or ethylene. The method has the steps of providing supplies of hydrogen, water, carbon monoxide, carbon dioxide, and methane, respectively, providing a catalyst system having firstly a catalyst selected from group VIII transition metal oxides, and secondly a catalyst support, treating the methane supply with the catalyst system for producing a first reactant, providing a second reactant, and reacting the first reactant with the second reactant for producing an intermediate, wherein the intermediate is calcium carbide (CaC.sub.2).

The present invention is concerned with a method of production of acetylene or ethylene. The method has the steps of providing supplies of hydrogen, water, carbon monoxide, carbon dioxide, and methane, respectively, providing a catalyst system having firstly a catalyst selected from group VIII transition metal oxides, and secondly a catalyst support, treating the methane supply with the catalyst system for producing a first reactant, providing a second reactant, and reacting the first reactant with the second reactant for producing an intermediate, wherein the intermediate is calcium carbide (CaC.sub.2).

A method for producing a metal carbide, including electrode preparation that includes preparing a first molten salt containing at least one first metal ion selected from alkali metal ions or alkali earth metal ions, and a carbonate ion, and applying a voltage to the first molten salt to precipitate a precipitate containing carbon on a first electrode, thereby obtaining a second electrode; and electrolysis that includes applying a voltage to a second molten salt containing at least one second metal ion selected from alkali metal ions or alkali earth metal ions using the second electrode to obtain a carbide composition containing a carbide of the second metal.