Pellets for a hydrogen source

摘要

A man portable hydrogen source, the source comprising one or more hydrogen generating elements ( 2 ), an ignition control system ( 3 ) and a pressure vessel ( 1 ). Each hydrogen generating element comprises a pellet holder ( 7 ) provided with one or more recesses and a thermal insulation layer ( 9 ) to reduce heat transfer to adjacent hydrogen generating elements; wherein at least one recess contains a pellet ( 8 ) of a chemical mixture which on thermal decomposition evolves hydrogen gas; wherein the ignition control system comprises one or more ignitors ( 14 ), associated with an individual pellet ( 8 ), and activation means to activate the ignitors; and wherein the evolved hydrogen and hydrogen generating elements are contained within the pressure vessel.