Patent ID: 7300038

Claim:
A method comprising the steps of: providing a vessel having a first end, a gas inlet located at the first end, a gas outlet located at the first end, a vessel wall enclosing an interior volume, and a plurality of longitudinally oriented heat transfer elements disposed in the interior volume, the vessel containing within the interior volume a solid vaporizable material having a solid form comprising any of agglomerated particles, powders, crystalline material, loose material, discontinuous material, and particulate form material; heating the vessel to vaporize at least a portion of the vaporizable material; introducing a first gas into the vessel via the inlet to contact the vaporizable material and produce a second gas comprising vaporized material; and delivering the second gas comprising vaporized material to process equipment via the outlet, wherein the vessel wall has an interior wall surface contacted by at least one of the first gas and the second gas.