Systems, methods and techniques for hydrogen production from chemical looping systems with particle heating

A reactor system, comprising:

• at least one first type reactor in fluid communication with a fuel source and a separation unit, the at least one first type reactor configured to:
• receive metal oxide particles from the separation unit;
• generate oxidation products by reacting the metal oxide particles with fuel from the fuel source;
• and
• provide the oxidation products from an outlet;
• at least one second type reactor in fluid communication with the at least one first type reactor, the at least one second type reactor configured to
• receive steam from a steam source;
• receive reduced metal oxide particles from the at least one first type reactor;
• generate hydrogen (H2) by reacting the steam and the reduced metal oxide particles;
• and
• provide hydrogen (H2) from an outlet of the at least one second type reactor;
• a heat source unit in fluid communication with an outlet of the at least one first type reactor and configured to receive oxidation products from the at least one first type reactor;
• a heat exchange unit in fluid communication with the at least one second type reactor and configured to:
• receive heat from the heat source unit;
• receive oxidized metal oxide particles from the at least one second type reactor;
• provide oxidized metal oxide particles at an increased temperature to the separation unit, the increased temperature being relative to a temperature exiting the at least one second type reactor;
• and
• the separation unit being in fluid communication with the heat exchange unit and the at least one first type reactor, the separation unit configured to separate a carrier gas from the oxidized metal oxide particles and provide the oxidized metal oxide particles to the at least one first type reactor.