Chemical Looping can also be used to produce hydrogen in Chemical-Looping Reforming (CLR) processes.[24][25] In one configuration of the CLR process, hydrogen is produced from coal and/or natural gas using a moving bed fuel reactor integrated with a steam reactor and a fluidized bed air reactor. This configuration of CLR can produce greater than 99% purity H2 without the need for CO2 separation.[3][26]