Portable gas generating device

A system for nitrous oxide decomposition comprising:

• a source of nitrous oxide, and
• a gas generator comprising:
• a reaction chamber for accepting nitrous oxide at a first port and for releasing gas from the nitrous oxide decomposition at a second port, the reaction chamber having an interior and an exterior chamber wall, the interior chamber wall for constraining a nitrous oxide decomposition reaction and the exterior chamber wall defining a jacket between it and the interior chamber wall;
• and
• the jacket at least partially enveloping the reaction chamber, the jacket defining one or more channels between the interior chamber wall and the exterior chamber wall, the one or more channels for transporting the nitrous oxide within the jacket from the first port of the reaction chamber and for facilitating the transfer of heat generated during the nitrous oxide decomposition to an incoming source of nitrous oxide, the incoming source of nitrous oxide being preheated to more efficiently decompose within the gas generator, and
• wherein the reaction chamber is regeneratively cooled by the incoming nitrous oxide.