Abstract:
A hydrogen generation apparatus (100) includes: a reformer (10) configured to generate a hydrogen-containing gas by using a raw material and steam; a raw material passage (21) through which the raw material that is supplied to the reformer (10) flows; a hydrodesulfurizer (13) provided downstream from a most downstream valve (11) on the raw material passage (21) and configured to remove a sulfur compound from the raw material; a sealer (15) provided on a passage (24) downstream from the reformer (10) and configured to block communication between the reformer (10) and the atmosphere; and a depressurizer (16) provided on the raw material passage (21) at a portion connecting the hydrodesulfurizer (13) and the reformer (10) and configured to release, to the atmosphere, pressure in the reformer (10) that has increased after the sealer (15) is closed.
Abstract:
A fuel cell system includes a reforming unit, a carbon monoxide decreasing unit, a fuel cell, a burner unit, a raw gas supply device, and a heating unit. The heating unit is controlled at a start-up operation of the fuel cell system, so as to adjust an amount of a desorbed raw gas desorbed out of components of the raw gas adsorbed to at least one of a reforming catalyst and a carbon monoxide decreasing catalyst such that a ratio of an amount of combustion air to an amount of a raw gas in the burner unit falls within a predetermined range.
Abstract:
A hydrogen generator of the present invention includes a reformer (16) for generating a hydrogen-containing gas through a reforming reaction using a raw material; a combustor (102a) for heating the reformer (16); a combustion air supplier (117) for supplying combustion air to the combustor (102a); and an abnormality detector (110a) for detecting an abnormality; and a controller (110) configured to control the combustion air supplier (117) such that the reformer (16) is cooled with a higher rate in an abnormal shut-down process executed after the abnormality detector (110a) detects the abnormality, than in a normal shut-down process.
Abstract:
A method of operating a fuel cell system (100) comprises the steps of: generating a hydrogen-containing gas from a gas containing at least one of a nitrogen gas and a nitrogen compound, by a hydrogen generator (2); removing ammonia from the hydrogen-containing gas; detecting a temperature of the hydrogen-containing gas from which the ammonia has been removed; and starting supplying of the hydrogen-containing gas from the hydrogen generator (2) to the fuel cell (7), when the detected temperature of the hydrogen-containing gas is equal to or higher than a predetermined threshold.
Abstract:
A hydrogen generator (100) includes: a reformer (1) configured to generate a hydrogen-containing gas using a raw material and steam; a water evaporator (4) configured to supply the steam to the reformer (1); a sealing device (10) provided on a passage located downstream of the reformer (1) and configured to block a gas in the passage from flowing to the atmosphere; and a depressurizer (3) provided on a passage located upstream of the reformer (1) and configured to release to the atmosphere, pressure in the hydrogen generator (100) which pressure is increased by water evaporation in the water evaporator (4) after the sealing device (10) is closed.
Abstract:
Provided is a hydrogen generator capable of suppressing degradation in capability of a hydrogen generator which is caused by crush of particulate reforming catalyst and of suppressing decrease in reforming efficiency due to decrease in heat transfer efficiency of a catalyzing portion which is caused by the crush of the particulate reforming catalyst. A hydrogen generator comprises a catalyzing portion 50 having particulate reforming catalyst P, and a combusting portion 5 for heating the catalyzing portion 50, the hydrogen generator being configured to generate a reformed gas containing hydrogen while flowing a material gas containing steam in a direction in which the catalyzing portion 50 extends. The catalyzing portion 50 includes a separating member 40. The separating member 40 is disposed on a separating cross-section which is a cross-section of the catalyzing portion 50 in a direction perpendicular to the direction in which the catalyzing portion 50 extends. A plurality of air holes 40D having a shape to inhibit passage of the particulate reforming catalyst P are provided on the separating member 40. An opening having a shape to permit passage of the particulate reforming catalyst P is provided on the separating cross-section.
Abstract:
It was difficult to acquire a good CO cleanup efficiency in a hydrogen refining apparatus, for instance, when the start-up and stop operations are frequently repeated. A hydrogen refining apparatus, including a shifter having a shifting catalyst body containing noble metals and metal oxides, and a reforming section for supplying hydrogen gas containing carbon monoxide to the shifter, (1) the temperature of an upstream side of the shifting catalyst body relative to the hydrogen gas flow being substantially between 300° C. and 500° C. and (2) the temperature of a downstream side of the shifting catalyst body relative to the hydrogen gas flow being substantially at 300° C. or less.
Abstract:
An apparatus of removing carbon monoxide, has: a hydrogen gas supply unit of supplying a hydrogen gas, a catalytic reaction unit provided with a catalyst body carrying a platinum group metal catalyst, a hydrogen gas introducing unit which introduces a hydrogen gas containing carbon monoxide from the hydrogen gas supply unit to the catalytic reaction unit, and an oxidizing gas supply unit of supplying an oxidizing gas containing oxygen to the catalytic reaction unit, wherein the catalyst body is brought into an oxidizing atmosphere for a period of time during operation according to a predetermined condition or when the apparatus is stopped. Thus, carbon monoxide can be eliminated sufficiently.
Abstract:
The present invention relates to an electric power generator and its operation method, which electric power generator is equipped with a hydrogen generator, a polymer electrolyte fuel cell for generating electric power using hydrogen rich gas from the hydrogen generator, a burner for heating the hydrogen generator, a flow rate controller for controlling the supply amount of a burning fuel to the burner, a communicating pathway connecting the flow rate controller and the burner, a joint where at least a residual fuel gas from a fuel electrode of the fuel cell and/or an incompletely generated gas from the hydrogen generator are combined into the communicating pathway, and a pressure-transferring pipe for releasing the pressure between the joint and the flow rate controller into the flow rate controller; the flow rate controller controls the supply amount of the burning fuel on the basis of the above-mentioned pressure.
Abstract:
A subscriber circuit is capable of realizing a CLIP service in an old-fashioned switching system. The subscriber circuit has a ringer transmitting circuit, which is connected to line A and line B, and which transmits a ringer signal in accordance with a ringer transmission request signal from a host system; a battery feed circuit, which supplies speech current to line A and line B; and a timer, which detects, in accordance with a change in the level of a ringer transmission request signal from the above-mentioned host system, the end of transmission of a ringer signal transmitted by the ringer transmitting circuit, starts timer operation, and ends this timer operation after a predetermined time has elapsed. The battery feed circuit supplies speech current to line A and line B from the above-mentioned battery feed circuit during the operation period of the timer.