Abstract:
A hydrogen generation system comprises a reformer 1 that contains a reforming catalyst, an evaporator 4 that supplies steam to the reformer 1, a heater 3 that heats the reformer 1 and the evaporator 4, a material feed portion 5 that feeds a feed material containing hydrocarbon compound to the reformer 1 through the evaporator 4, and a water supply portion 6 that has a flow rate switch 6a and supplies water to the reformer 1 and the evaporator 4.
Abstract:
The present invention is a method for recovering a catalyst from a catalyst body comprising a carrier having a catalyst layer formed on at least a part of the surface thereof, which comprises (a) a step of forming an overcoat layer on the surface of the catalyst layer, and (b) a step of allowing the catalyst body having the overcoat layer formed thereon to stand under the condition to result in a difference in expansibility or contractility exhibited by the overcoat layer from that exhibited by the carrier, wherein exfoliation of the catalyst layer from the carrier is permitted by means of the resulting difference in expansibility or contractility under the condition.
Abstract:
The present invention provides a fuel cell system comprising a hydrogen generator (1) which generates hydrogen gas by allowing a source material to undergo a reforming reaction and a fuel cell (3) which is equipped with a anode and an cathode and which generates electric power by allowing the hydrogen gas supplied to the anode and oxygen gas supplied to the cathode to react electrochemically with each other. The fuel cell system further comprises a water recovering portion (5) configured to recover water from water vapor discharged from at least one of the fuel and cathodes, a water storing portion (6) which is equipped with a tank (6a) for storing water recovered by the water recovering portion (5), and a water supply portion (10) configured to supply water stored in the tank (6a) to the hydrogen generator (1), wherein the tank (6a) is configured, in order to prevent water stored in the tank (6a) from decaying, such that the stored water is dischargable to the outside, and wherein the fuel cell system is so configured as to make a decision on whether or not to discharge the stored water to the outside for the prevention of water decay.
Abstract:
A fuel cell system of the present invention comprises a fuel cell (101); a first heat medium path through which a first heat medium for cooling the fuel cell (101) flows; a first flow control device (107) configured to flow the first heat medium in the first heat medium path; an abnormality detector configured to detect an abnormality; and a controller (110) configured to control the first flow control device (107) such that the fuel cell (101) after shut-down of power generation is cooled with a higher rate in an abnormal shut-down process performed after the abnormality detector detects the abnormality, than in a normal shut-down process.
Abstract:
A fuel cell system of the present invention includes: a hydrogen generator (1) having a reformer (1a) configured to generate a hydrogen-containing gas by a reforming reaction using a raw material; a fuel cell (2) configured to generate electric power using the hydrogen-containing gas supplied from the hydrogen generator (1); a combustor (3) configured to combust an anode off gas discharged from the fuel cell (2) to heat the reformer (1a); a CO detector (7) configured to detect a carbon monoxide concentration of a flue gas discharged from the combustor (3); an electric heater (8) configured to heat the CO detector (7); and a controller (19), and the controller (19) is configured to increase an amount of energization to the electric heater (8) in accordance with an increase in an amount of electric power generated by the fuel cell (2).
Abstract:
A hydrogen generating apparatus including a reformer which performs a reforming reaction using a material and steam to generate hydrogen-containing gas; a water evaporator which generates the steam supplied to the reformer; a first water pathway through which reforming water to be supplied to the water evaporator flows; a pump which supplies the reforming water to the water evaporator 1a; a second water pathway 7 branching from the first water pathway on the downstream side of the pump; a first water tank to which the water flowing through the second water pathway flows; a first flow rate controller provided on the second water pathway; and a controller which operates the pump and controls the first flow rate controller so that water flows through the second water pathway, thereby stably generating hydrogen and preventing degradation of the reformer thereof is realized.
Abstract:
A hydrogen generator (1) includes: a reformer which generates a hydrogen-containing gas from a raw material and steam; a combustor (4) which heats the reformer; an evaporator (2) which generates the steam by utilizing heat of a combustion gas after the reformer is heated by the combustion gas; and a control unit (20), the hydrogen generator (1) is controlled such that ON and OFF of a combustion operation of the combustor (4) are repeated in a start-up operation of the hydrogen generator (1) and a temperature of the reformer is kept to a predetermined temperature or lower, and the control unit (20) controls the combustion operation such that a heat amount per unit time by the combustor (4) in a first combustion operation is larger than the heat amount per unit time in k-th (k>1) and following combustion operations.
Abstract:
A hydrogen generator (100) of the present invention includes: a raw material supplying device (4) configured to supply a raw material containing a sulfur constituent; a hydrogen supplying device (7) configured to generate hydrogen by electrolysis of water; a hydro-desulfurizer (5) configured to remove the sulfur constituent of the raw material by using the hydrogen generated by the hydrogen supplying device (7), the raw material being supplied from the raw material supplying device (4); and a reformer (1) configured to generate a hydrogen-containing gas by a reforming reaction of the raw material from which the sulfur constituent is removed by the hydro-desulfurizer (5).
Abstract:
A fuel cell system of the present invention includes: a fuel cell (1) configured to generate electric power using a fuel gas and an oxidizing gas; a hydrogen generator (2) having a reformer (71) configured to generate a hydrogen-containing fuel gas from a raw material and steam; a cooling water passage (4) through which cooling water for cooling down the fuel cell (1) flows; a cooling water tank (5) configured to store the cooling water; a recovered water tank (7) configured to store water recovered from the fuel gas and the oxidizing gas discharged from the fuel cell (1); a first water passage (8) connecting the recovered water tank (7) and the reformer (71); a purifier (10) disposed on the first water passage (8); a second water passage (11) branching from the first water passage (8) located downstream of the purifier (10) and connected to the cooling water tank 85); and a first pump (9) configured to feed the water from the recovered water tank (7) to the first water passage (8).
Abstract:
A hydrogen generator includes: a reformer (102) configured to generate a hydrogen-containing gas by a reforming reaction using a raw material; a combustor (104) configured to heat the reformer; an air supplying device (106) configured to supply combustion air to the combustor; a first heat exchanger (108) configured to recover heat from a flue gas discharged from the combustor; a first heat medium passage (110) through which a first heat medium flows, the first heat medium receiving the heat recovered from the flue gas in the first heat exchanger; a first pump (112) configured to cause the first heat medium in the first heat medium passage to flow; a heat accumulator (140) configured to store the heat recovered by the first heat medium; and a controller (114) configured to cause the first pump to operate in a cooling step that is a step of cooling down at least the reformer by supplying the air from the air supplying device to the combustor in a state where the combustor is not carrying out combustion during a stop processing