(359f) Calcium Looping Processes for Hydrogen Rich Syngas Production

The calcium looping process integrates fuel conversion with gas separation using a dual reactor scheme, which is promising for low-carbon hydrogen production with the elimination of energy-intensive air separation, water-gas shift, and CO₂ removal units. A 1 MWth calcium looping gasification pilot unit was designed, constructed and demonstrated for coal and biomass to hydrogen rich syngas production. The design of the pilot unit was proven to be robust through more than 100 hour steady operation under continuous coal/biomass feed conditions. The stable temperature and pressure profiles suggested the reliable operation strategy to complete the interrelated mass balance, energy balance and pressure balance between the two reactors. The pilot scale study has validated the feasibility and reliability of the calcium looping gasification process and demonstrated the advantage for low-carbon hydrogen production. Other recent studies are also illustrated for direct hydrogen rich syngas production using calcium looping scheme in the presentation.