Replaceable modular device for hydrogen release

A modular device for generating hydrogen gas from a hydrogen liquid carrier, the modular device comprising:

• a housing including a plurality of access ports;
• a plurality of inner cartridges arranged within the housing, wherein at least one inner cartridge of the plurality of inner cartridges includes at least one first catalyst configured to cause a release of hydrogen gas when exposed to the hydrogen liquid carrier;
• a first marginal cartridge disposed within the housing on a first end of the modular device and a second marginal cartridge disposed within the housing on a second end of the modular device, wherein:
• the first marginal cartridge includes at least one second catalyst configured to cause a release of hydrogen gas when exposed to the hydrogen liquid carrier, and
• the second marginal cartridge includes at least one third catalyst configured to cause a release of hydrogen gas when exposed to the hydrogen liquid carrier;
• a cooling system for removing heat generated within the modular device;
• at least one fuel inlet for receiving the hydrogen liquid carrier;
• at least one gas outlet for expelling the hydrogen gas generated in the modular device;
• and
• at least one liquid outlet for expelling the hydrogen liquid carrier,
• wherein each cartridge of the plurality of inner cartridges is individually removable from the housing through a corresponding one of the plurality of access ports.