Hydrogen generation assemblies and hydrogen purification devices

A steam reforming hydrogen generation assembly configured to receive at least one feed stream and generate a reformate stream containing hydrogen gas as a majority component and other gases, comprising:

• an enclosure;
• a hydrogen-producing region contained within the enclosure and including a reforming catalyst and configured to receive the at least one feed stream and to produce the reformate stream via a steam reforming reaction;
• a feed stream conduit in fluid communication with the hydrogen-producing region and through which the at least one feed stream is passed prior to delivery to the hydrogen-producing region;
• and
• a heating assembly in thermal communication with the hydrogen-producing region, the heating assembly including:
• inlets for receiving at least one fuel stream and at least one air stream;
• an igniter assembly configured to ignite the at least one fuel stream, comprising:
• a body portion;
• at least one igniter element attached to the body portion;
• and
• wires in electrical communication with the at least one igniter element and at least partially enclosed by the body portion;
• and
• a metal cooling block having at least first and second channels in thermal communication with each other, the first channel receiving at least part of the body portion and at least part of the wires, and the second channel receiving at least part of the feed stream conduit.