Heterogeneous catalyst composition and methods thereof
AssigneeCopermic Catalysts, Inc.
InventorsJacob Grose, Aruna Ramkrishnan, Devin Peck
Life of this patent
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Abstract
Heterogeneous catalyst compositions that can be used for gas phase catalysis such as for ammonia synthesis and/or hydrogenation reactions are generally provided. The catalyst composition may include a catalyst (e.g., a metallic catalyst) associated with a support material (e.g., an oxide support such as a doped or undoped ceria). In some, but not all embodiments, the metal catalyst (e.g., in the form of metallic nanoparticles) is formed from one or more transition metals such as but not limited iron and/or ruthenium.
Claims28
A heterogeneous catalyst composition for gas-phase catalysis, the catalyst composition comprising:
- an oxide support material comprising oxygen, 2-5 different metal elements, and optionally nitrogen and/or hydrogen;
- and
- a metallic material associated with a surface of the oxide support material, wherein the metallic material has a formula of FeiRujTk, wherein Fe is iron, Ru is ruthenium, and T is a transition metal other than Fe or Ru;
- and wherein 0<i<=100, 0<=j<100, 0<=k<50, and i+j+k=100.
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A supported heterogeneous catalyst composition for gas-phase catalysis, the supported catalyst composition comprising:
- a metallic material associated with a surface of a catalyst support material, wherein the metallic material has a formula of FeiRujTk, wherein Fe is iron, Ru is ruthenium, and T is a transition metal other than Fe or Ru, and wherein 0<i<=100, 0<=j<100, 0<=k<50, and i+j+k=100, and
- wherein the supported catalyst composition enables single-pass yields of ammonia synthesized from hydrogen gas and nitrogen gas precursors at a 3:1 H2:N2 ratio in excess of 5% at 350° C., 75 bar total pressure, and 5000 h−1 gas hourly space velocity (GHSV).
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A method of producing ammonia, the method comprising:
- contacting a catalyst composition with a precursor gas stream comprising nitrogen and hydrogen gases, the catalyst composition comprising:
- an oxide support material comprising oxygen, 2-5 different metal elements, and optionally nitrogen and/or hydrogen;
- and
- a metallic material associated with a surface of the oxide support material, wherein the metallic material has a formula of FeiRujTk, wherein Fe is iron, Ru is ruthenium, and T is a transition metal other than Fe or Ru;
- and wherein 0<i<=100, 0<=j<100, 0<=k<50, and i+j+k=100;
- and
- producing ammonia at a surface of the catalyst composition.
49-91. (canceled)
Dependencies are inferred from the claim text.