| 摘要 |
A steam reformer (20) for producing hydrogen from a low pressure hydrocarbon gas (preferably propane) using an improved gaseous hydrocarbon fuel and steam delivery system (4) comprising two coaxial tubes (27, 28), wherein an outer tube (27) delivers steam and an inner tube (28) delivers gaseous hydrocarbon. Said outer tube (27) is gradually reduced in diameter to form a truncated conical tip for the outflow of steam around the end of the inner tube (28). The outflow ends of both tubes (27, 28) are positioned in the same plane (30) perpendicular to their axis. The outflow end of the inner tube (28) is preferably also gradually reduced in diameter in order to provide higher velocity of gaseous hydrocarbon and to optimize mixing of said hydrocarbon and steam. |
