초록 ▼

The invention disclosed is a method for the reduction of carbon monoxide to carbon dioxide in a gas stream comprising carbon monoxide, hydrogen and water vapor, wherein the carbon monoxide and hydrogen have a mole ratio greater than 5:1, with substantially reduced methanation. The invention utilizes

The invention disclosed is a method for the reduction of carbon monoxide to carbon dioxide in a gas stream comprising carbon monoxide, hydrogen and water vapor, wherein the carbon monoxide and hydrogen have a mole ratio greater than 5:1, with substantially reduced methanation. The invention utilizes a reactor having at least one channel having a catalyst positioned thereon and a flow rate of the gas stream over the catalyst such that a boundary layer having a thickness less than a maximum thickness boundary is created.

대표청구항 ▼

1. A method for the conversion of carbon monoxide to carbon dioxide in the presence of hydrogen with reduced methanation comprising the steps of: providing a catalytic reactor having at least one channel defined at least in part by a catalytic surface suitable for supporting a water gas shift reac

1. A method for the conversion of carbon monoxide to carbon dioxide in the presence of hydrogen with reduced methanation comprising the steps of: providing a catalytic reactor having at least one channel defined at least in part by a catalytic surface suitable for supporting a water gas shift reaction; and presenting a gas stream at a known flow rate and inlet temperature to said at least one channel so that a boundary layer formed thereby relative to said catalytic surface defines a thickness that is less than the thickness of a fully-developed boundary layer over said catalytic surface, the hydrogen mole concentration being greater than or equal to five (5) times the carbon monoxide mole concentration; and generating a reaction such that oxidation of said gas stream occurs preferentially converting said CO to CO 2.2. The method of claim 1 including the additional step of adjusting the flow rate to produce a thickness less than 0.03 inches.3. The method of claim 2 including the additional step of adjusting the flow rate to produce a thickness of about 0.008 inches.4. The method of claim 1 wherein said catalytic surface comprises platinum.5. The method of claim 4 wherein the catalytic surface includes a washcoat.6. The method of claim 5 wherein said washcoat comprises alumina.7. The method of claim 6 wherein said catalytic surface is stabilized with a stabilizer.8. The method of claim 7 wherein said stabilizer includes lanthanum.9. The method of claim 1 wherein said catalytic reactor is comprised of a plurality of said channels wherein at least one of said channels is defined by substrate and another of said channels is defined by another substrate.10. The method of claim 1 wherein said gas stream comprises carbon dioxide.11. The method of claim 1 including the further step of adjusting the mole ratio of said carbon monoxide to said carbon dioxide to a ratio greater than 1.0.12. The method of claim 1 further including the step of adjusting the flow rate and the inlet temperature to produce a temperature on said catalytic surface less than 450 degrees C.13. The method of claim 1 wherein said at least one channel has a length less than 0.45 inches.14. The method of claim 1 further including the step of adjusting said flow rate and said inlet temperature to produce a temperature on the catalytic surface greater than about 300 degrees C.