High entropy alloy catalyst for production of hydrogen from natural gas
Hydrogen may be produced from natural gas (e.g., methane). For example, a method for producing hydrogen from natural gas may include: introducing natural gas to a reactor, wherein the reactor contains therein a catalyst, wherein the catalyst includes a high entropy alloy, and wherein the high entropy alloy has an entropy, S, such that S≥11.31 J K −1 mol −1 ; reacting the natural gas with the catalyst to form hydrogen gas and solid carbon; and separating the hydrogen gas from the solid carbon to produce a hydrogen stream comprising the hydrogen gas from the reactor.
1 . A method comprising:
introducing natural gas to a reactor, wherein the reactor contains therein a catalyst, wherein the catalyst comprises a high entropy alloy, and wherein the high entropy alloy has an entropy, S, such that S≥11.31 J K −1 mol −1 ;
reacting the natural gas with the catalyst to form hydrogen gas and solid carbon; and
separating the hydrogen gas from the solid carbon to produce a hydrogen stream comprising the hydrogen gas from the reactor.
2 . The method of claim 1 , wherein the high entropy alloy comprises 5 or more metals, and wherein each of the 5 or more metals has a composition in the high entropy alloy from 0.1 at % (atomic percentage) to 50 at %.
3 . The method of claim 2 , wherein the 5 or more metals are selected from a group consisting of: cobalt, chromium, iron, manganese, nickel, aluminum, magnesium, copper, zinc, zirconium, ruthenium, rhodium, palladium, silver, tungsten, rhenium, iridium, platinum, gold, cerium, ytterbium, tin, calcium, beryllium.
4 . The method of claim 1 , wherein the high entropy alloy comprises a catalyst support.
5 . The method of claim 1 , wherein the high entropy alloy comprises a catalyst promotor.
6 . The method of claim 1 , wherein the catalyst further comprises an external catalyst support.
7 . The method of claim 1 , wherein the catalyst further comprises an external catalyst promotor.
8 . The method of claim 1 , wherein the solid carbon comprises amorphous carbon, carbon nanotubes, nanofibers, or any combination thereof.
9 . The method of claim 1 , wherein the catalyst further comprises a non-stick additive, and wherein the non-stick additive comprises a magnesium silicate, a boron silicate, a borate silicate, aluminum oxide, silicon dioxide, titanium oxide, zirconium oxide, or any combination thereof.