Reformer and indirect internal reforming high temperature fuel cell
View Patent ↗To provide a reformer that uses a relatively inexpensive granular catalyst and can provide a more uniform temperature distribution in a catalyst bed while suppressing increase in the size of the reformer and the required power and size of an auxiliary machine, and a more compact indirect internal reforming high temperature fuel cell while suppressing increase in cost. A reformer that produces a hydrogen-containing gas from a hydrocarbon-based fuel by a steam reforming reaction has a reactor vessel and a reforming catalyst bed packed with a granular catalyst having steam reforming activity in the reactor vessel, the reformer has a partition plate that divides the reforming catalyst bed into at least two sections, the partition plate has a thermal conductivity higher than effective thermal conductivity of the catalyst bed, and the partition plate extends in the reactor vessel from a part which is at a higher temperature in a rated operation to a part which is at a lower temperature in rated operation. An indirect internal reforming high temperature fuel cell has the reformer and a high temperature fuel cell that generates electric power using a hydrogen-containing gas, and the reformer is disposed at a position where the reformer receives thermal radiation from the high temperature fuel cell.
1. An indirect internal reforming high temperature fuel cell, comprising:
a reformer for producing a hydrogen-containing gas from a hydrocarbon-based fuel by a steam reforming reaction; and
a high temperature fuel cell that generates electric power using the hydrogen-containing gas,
the reformer comprising a reactor vessel and a reforming catalyst bed packed with a granular catalyst having steam reforming activity in the reactor vessel, and
the reformer being disposed at a position wherein the reformer receives thermal radiation from the high temperature fuel cell,
wherein the reformer has a partition plate for dividing the reforming catalyst bed into at least two sections,
a thermal conductivity of the partition plate is higher than an effective thermal conductivity of the catalyst bed,
the partition plate extends in the reactor vessel from a part which is at a higher temperature in rated operation to a part which is at a lower temperature in rated operation,
the high temperature fuel cell is essentially in a shape of a rectangular parallelepiped, and is configured so that an anode off gas is able to be burned on the upper surface of the high temperature fuel cell, and
the reformer is disposed above the high temperature fuel cell, and is configured so that a flow direction of a gas in the reformer is essentially horizontal.
2. The indirect internal reforming high temperature fuel cell of claim 1 , wherein the reactor vessel is heated at a lower surface by combustion heat of the anode off gas burned on the top surface of the high temperature fuel cell.
3. The indirect internal reforming high temperature fuel cell of claim 1 , wherein the reformer further comprises a second partition plate.
4. The indirect internal reforming high temperature fuel cell of claim 1 , wherein the partition plate comprises a metal.
5. The indirect internal reforming high temperature fuel cell of claim 1 , wherein the partition plate is disposed to extend along the direction of flow of the gas in the reformer.
6. The indirect internal reforming high temperature fuel cell of claim 1 , wherein the reformer further comprise a heat source that heats the catalyst bed inside the reactor vessel.
7. The indirect internal reforming high temperature fuel cell of claim 6 , wherein the heat source is an electric heater.
8. The indirect internal reforming high temperature fuel cell of claim 1 , wherein the high temperature fuel cell comprises a solid oxide fuel cell.
9. The indirect internal reforming high temperature fuel cell of claim 1 , wherein the high temperature fuel cell comprises a molten carbonate fuel cell.
10. The indirect internal reforming high temperature fuel cell of claim 1 , wherein the granular catalyst comprises steam reforming catalyst including a ruthenium-based catalyst or a nickel-based catalyst.