Sulfur-tolerant catalyst prepared through high pressure decomposition
View Patent ↗A method of producing a MoS 2 catalyst. The method begins by the decomposition of ammonium tetrathiomolybdate in an organic solvent. This decomposition is done in the presence of a solution comprising: a solvent and a promoter, and done under gaseous pressure.
1. A method comprising:
decomposition of ammonium tetrathiomolybdate in an organic solvent in the presence of a solution comprising:
a solvent; and
a promoter comprising zirconium and elemental sulfur,
wherein the decomposition produces a MoS 2 catalyst and the decomposition occurs under gaseous pressure.
2. The method of claim 1 , wherein the solvent is H 2 O.
3. The method of claim 1 , wherein the temperature of the decomposition is from 275° C. to 475° C.
4. The method of claim 1 , wherein the gaseous pressure of the decomposition is greater than 2000 psig.
5. The method of claim 1 , wherein the gaseous pressure of the decomposition is from 2000 psig to 3000 psig.
6. The method of claim 1 , wherein the decomposition occurs under the gaseous pressure of H 2 .
7. The method of claim 1 , wherein the MoS 2 catalyst has a total CO conversion in synthesis gas methanation greater than 75%.
8. A method comprising:
decomposition of ammonium tetrathiomolybdate in an organic solvent in the presence of a solution comprising:
a solvent of water; and
a promoter comprising zirconium and elemental sulfur,
wherein the temperature of the decomposition is from 275° C. to 475° C. and the pressure the decomposition occurs under a H 2 gaseous pressure from 2000 psig to 3000 psig,
to produce a MoS 2 catalyst having a total CO conversion in synthesis gas methanation greater than 75%.