US 12,458,959 B2
Compositions and methods for treating porous materials
Tomas Ricciardulli, Brooklyn, NY (US); Samuel Dull, Brooklyn, NY (US); and Boris Sheludko, Brooklyn, NY (US)
Assigned to Amogy Inc., Brooklyn, NY (US)
Filed by Amogy Inc., Brooklyn, NY (US)
Filed on Feb. 14, 2025, as Appl. No. 19/054,306.
Application 19/054,306 is a continuation of application No. PCT/US2024/035649, filed on Jun. 26, 2024.
Claims priority of provisional application 63/510,333, filed on Jun. 26, 2023.
Prior Publication US 2025/0186982 A1, Jun. 12, 2025
Int. Cl. B01J 37/02 (2006.01); B01J 21/04 (2006.01); B01J 37/08 (2006.01); C01B 3/04 (2006.01)
CPC B01J 37/0203 (2013.01) [B01J 21/04 (2013.01); B01J 37/08 (2013.01); C01B 3/047 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of preparing a catalyst, the method comprising:
(a) forming a doped porous material by impregnating a porous alumina support with a processing solution that includes a ruthenium salt, an acid, a solvent, and a non-metal reductant, wherein:
the solvent comprises water and/or an organic alcohol,
the volume of the processing solution is approximately equal to the pore volume of the porous alumina support,
the acid and the ruthenium salt have a common anion and/or a common ligand,
a concentration of the ruthenium salt ranges from about 5 wt % to about 10 wt % with respect to a total weight of the processing solution, providing a concentration of ruthenium ranging from about 1.5 wt % to about 8 wt % with respect to a total weight of the catalyst,
a concentration of the non-metal reductant ranges from about 5 wt % to about 20 wt % with respect to the total weight of the processing solution,
the non-metal reductant is citric acid or ascorbic acid, and
a molar ratio of the non-metal reductant to the ruthenium in the processing solution ranges from about 1:10 to about 50:1; and
(b) a heating the doped porous material to remove the non-metal reductant by at least one of volatilization or decomposition, wherein the surface of the support is substantially free of residue, deposit, or both in response to the at least one of volatilization or decomposition of the non-metal reductant, wherein the doped porous material is heated to a temperature that is less than about 900° C.,
wherein on contact with a gas comprising ammonia (NH3), the catalyst exhibits a conversion efficiency of ammonia to hydrogen (H2) of at least about 31.8% at a temperature of about 400° C. and a weight hourly space velocity (WHSV) of about 10,000 mLNH3 h−1 gcat−1.