Method for producing fuel gas
AssigneeOsaka Gas Co., Ltd.
InventorsHirofumi Ohtsuka, Shimpei Norioka
Life of this patent
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Abstract
Provided is a first step of causing hydrogen and carbon oxide to react with each other in a presence of a first catalyst to obtain a first fuel gas 2 that contains 2% to 10% hydrogen by volume after dehydration; and a second step of consuming the hydrogen in the first fuel gas 2 to obtain a second fuel gas 4 with a reduced hydrogen concentration. The first catalyst includes a methanation catalyst. The second step includes an exothermic reaction that generates heat of 60 kJ or more per mole of hydrogen, and the exothermic reaction is a reaction through which the hydrogen in the first fuel gas 2 and a predetermined reactant 3 are caused to react with each other in a presence of a second catalyst to generate water or a paraffin hydrocarbon with two to four carbon atoms.
Claims7
A method for producing fuel gas comprising:
- a first step of causing hydrogen and carbon oxide to react with each other in a presence of a first catalyst to obtain a first fuel gas that contains 2% to 10% hydrogen by volume after dehydration;
- and
- a second step of consuming the hydrogen in the first fuel gas to obtain a second fuel gas with a reduced hydrogen concentration,
- wherein the first catalyst contains a methanation catalyst,
- the second step includes an exothermic reaction that generates heat of 60 kJ or more per mole of hydrogen,
- the exothermic reaction is a reaction through which the hydrogen in the first fuel gas and a predetermined reactant are caused to react with each other in a presence of a second catalyst to generate water and a paraffin hydrocarbon with two to four carbon atoms,
- the predetermined reactant comprises at least one alcohol selected from among alcohols that each have two to four carbon atoms, and
- the second catalyst comprises a dehydration-hydrogenation catalyst that is active in a dehydration reaction of said at least one alcohol and a hydrogenation reaction of an olefin.
A method for producing fuel gas comprising:
- a first step of causing hydrogen and carbon oxide to react with each other in a presence of a first catalyst to obtain a first fuel gas that contains 2% to 10% hydrogen by volume after dehydration;
- and
- a second step of consuming the hydrogen in the first fuel gas to obtain a second fuel gas with a reduced hydrogen concentration,
- wherein the first catalyst contains a methanation catalyst,
- the second step includes an exothermic reaction that generates heat of 60 kJ or more per mole of hydrogen,
- the exothermic reaction is a reaction through which the hydrogen in the first fuel gas and a predetermined reactant are caused to react with each other in a presence of a second catalyst to generate a paraffin hydrocarbon with two to four carbon atoms,
- the predetermined reactant comprises at least one olefin hydrocarbon selected from among olefin hydrocarbons that each have two to four carbon atoms, and
- the second catalyst includes a hydrogenation catalyst.
Dependencies are inferred from the claim text.