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Pyrochlore-based Catalysts for Syngas-Derived Alcohol Synthesis

Improves the conversion of syngas from natural gas, coal, or biomass

National Energy Technology Laboratory

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Technology Marketing Summary

This technology provides an advantageous means to convert syngas into a class of chemicals known as higher oxygenates as well as other long-chain hydrocarbons. Research is currently active on this patent-pending technology "Synthesis, Characterization, and Catalytic Activity of Rh-based Lanthanum Zirconate Pyrochlores for Higher Alcohol Synthesis." This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy's National Energy Technology Laboratory.

Description

Industry has been increasingly attracted to the process of converting syngas from natural gas, coal, or biomass into various classes of chemicals such as  ethanol, known as higher oxygenates. The attraction stems from the fact that syngas can be used to produce a wide range of products, including liquid transportation fuels and a variety of chemical intermediates. These chemicals are commonly used as solvents, fuel additives, and neat fuels.

To attain higher oxygenate and long-chain hydrocarbon synthesis from syngas, the major technical challenge is to develop a catalyst with high selectivity towards carbon chain growth and/or CO insertion, higher syngas conversion at lower temperatures and pressures, and high stability in a reducing environment.

Researchers for this invention discovered that the pyrochlore material they developed addresses the above issues and improves the conversion process. Their pyrochlore material was found to interact with supported metals, such as Rh, to form long-chain and oxygenated hydrocarbon products from syngas with selectivities not achieved with other support systems that do not have the pyrochlore structure.

Researchers found that the unique feature of the pyrochlore material is its ability to isomorphically substitute various elements that can interact at the surface with clusters of metal atoms. The properties of the pyrochlore can be used to tailor the degree and type of interaction with the active metal to catalyze the conversion of syngas to specific end products.

Benefits
  • Improves the conversion of syngas from natural gas, coal, or biomass
  • Enhances the potential use of oxygenates as neat fuels or fuel additives
  • Develops a catalyst with high selectivity for higher alcohols
  • Produces by-products such as methanol, carbon dioxide, and methane
Applications and Industries
  • Hydrogen-rich syngas for solid-oxide fuel cells
  • Related chemical, advanced material, and environmental uses
More Information

U.S. Patent No. 9,150,476 was issued October 6, 2015, titled " Method of CO and/or CO2Hydrogenation Using Doped Mixed Metal Oxides."

Inventors: Dushyant Shekhawat, David Berry, Daniel Haynes, Victor Abdelsayed, Mark Smith, and James Spivey

US. Non-provisional Patent Application No. 14/834,487 was filed August 25, 2015, titled "Method of CO and/or CO2 Hydrogenation to Higher Hydrocarbons using Doped Mixed-Metal Oxides."

Inventors: Dushyant Shekhawat, David Berry, Daniel Haynes, Victor Abdelsayed, Mark Smith, and James Spivey

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 9,150,476
Patent
9,150,476
Method of CO and/or CO.sub.2 hydrogenation using doped mixed-metal oxides
A method of hydrogenation utilizing a reactant gas mixture comprising a carbon oxide and a hydrogen agent, and a hydrogenation catalyst comprising a mixed-metal oxide containing metal sites supported and/or incorporated into the lattice. The mixed-metal oxide comprises a perovskite, a pyrochlore, a fluorite, a brownmillerite, or mixtures thereof doped at the A-site or the B-site. The metal site may comprise a deposited metal, where the deposited metal is a transition metal, an alkali metal, an alkaline earth metal, or mixtures thereof. Contact between the carbon oxide, hydrogen agent, and hydrogenation catalyst under appropriate conditions of temperature, pressure and gas flow rate generate a hydrogenation reaction and produce a hydrogenated product made up of carbon from the carbon oxide and some portion of the hydrogen agent. The carbon oxide may be CO, CO.sub.2, or mixtures thereof and the hydrogen agent may be H.sub.2. In a particular embodiment, the hydrogenated product comprises an alcohol, an olefin, an aldehyde, a ketone, an ester, an oxo-product, or mixtures thereof.
U.S. Department of Energy 10/06/2015
Issued
Patent 9,598,644
Patent
9,598,644
Method of CO and/or CO.sub.2 hydrogenation to higher hydrocarbons using doped mixed-metal oxides
A method of hydrogenation utilizing a reactant gas mixture comprising a carbon oxide and a hydrogen agent, and a hydrogenation catalyst comprising a mixed-metal oxide containing metal sites supported and/or incorporated into the lattice. The mixed-metal oxide comprises a pyrochlore, a brownmillerite, or mixtures thereof doped at the A-site or the B-site. The metal site may comprise a deposited metal, where the deposited metal is a transition metal, an alkali metal, an alkaline earth metal, or mixtures thereof. Contact between the carbon oxide, hydrogen agent, and hydrogenation catalyst under appropriate conditions of temperature, pressure and gas flow rate generate a hydrogenation reaction and produce a hydrogenated product made up of carbon from the carbon oxide and some portion of the hydrogen agent. The carbon oxide may be CO, CO.sub.2, or mixtures thereof and the hydrogen agent may be H.sub.2. In a particular embodiment, the hydrogenated product comprises olefins, paraffins, or mixtures thereof.
U.S. Department of Energy 03/21/2017
Issued
Technology Status
Development StageAvailabilityPublishedLast Updated
PrototypeAvailable05/03/201306/12/2017

Contact NETL About This Technology

To: Jessica Sosenko<Jessica.Sosenko@netl.doe.gov> <techtransfer@netl.doe.gov>