HYDROGEN SEPARATION DEVICE AND METHOD FOR OPERATING SAME

摘要

The purpose of the present invention is to provide: a method for operating hydrogen separation devices that is capable of efficiently suppressing hydrogen embrittlement in the hydrogen separation alloy membrane; and a hydrogen separation device that performs favorably during the repeated starting and stopping thereof. A method for operating a hydrogen separation device for separating hydrogen from a hydrogen mixed gas using a membrane separation technique, wherein the hydrogen separation device performs: a step for using a hydrogen separation alloy membrane, and stopping supply of the hydrogen mixed gas to the hydrogen separation alloy membrane when the temperature of the hydrogen separation alloy membrane reaches a range of 300-600°C; a step, which follows the step for stopping the supply of the hydrogen mixed gas, for supplying an oxidized gas over a prescribed period of time to at least the upstream side of the hydrogen separation alloy membrane when the temperature of the hydrogen separation alloy membrane reaches the range of 300-600°C; and a step to be performed thereafter for decreasing the temperature of the hydrogen separation alloy membrane to less than 200°C.