Method of using molybdenum carbide catalyst
AssigneeN.V. Union Miniere S.A.
InventorsPurnesh Seegopaul, Lin Gao
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Abstract
A molybdenum carbide compound is formed by reacting a molybdate with a mixture of hydrogen and carbon monoxide. By heating the molybdate powder from a temperature below 300° C. to maximum temperature 850° C., a controlled reaction can be conducted wherein molybdenum carbide is formed. A high surface area, nanograin, metastable molybdenum carbide can be formed when the reaction temperature is below 750° C. The metastable molybdenum carbide is particularly suitable for use as a catalyst for the methane dry reforming reaction and the water gas shift reaction.
Claims9
The method of forming hydrogen from a gas mixture of methane and carbon dioxide comprising contacting gas said mixture with a catalyst comprising molybdenum carbide having a surface area of at least 35 m2/g.
The method of conducting a water gas shift reaction comprising contacting a gas comprising a mixture of hydrogen, carbon monoxide and water vapor at a temperature of about 200° to 550° C. in contact with a catalyst said catalyst comprising molybdenum carbide.
A method of utilizing a molybdenum carbide catalyst in a reaction vessel having a controlled atmosphere comprising:
- passivating said molybdenum carbide catalyst to form oxides on surfaces of said molybdenum carbide catalyst;
- introducing said molybdenum carbide catalyst into a reaction vessel;
- activating said molybdenum carbide catalyst by passing a carburizing gas in contact with said catalyst at an elevated temperature effective to activate said catalyst.
A method of forming a high surface area Mo2C comprising soaking a molybdenum compound selected from the group consisting of molybdates and oxide in a H/CO gas at 300°-400° C. for 1-5 hours;
- subsequently soaking said molybdenum compound in a H/CH4 mixture for 3-5 hours at a temperature of 550°-850° C.
Dependencies are inferred from the claim text.