Hydrogen Production from a Victorian Brown Coal with in Situ CO2 Capture in a 1 kWth Dual Fluidized-Bed Gasification Reactor

The removal of CO2 during coal gasification will improve H-2 yield by promoting coal gasification reactions toward the production of H-2. In this work, coal gasification with in situ CO2 capture has been investigated in a 1 kWth dual fluidized-bed gasification reactor. A Victorian brown coal was used as the feed stock. Coal gasification tests at 700 degrees C were performed with silica sands as the heat carrier and synthetic CaO sorbent for comparison. It was found that the addition of the sorbent improved H-2 concentration in the outlet of the fuel reactor by nearly 53%. Carbon conversion rate was also increased and a maximum of similar to 33% was reported. Calcium aluminate cement was used as a binder for the fabrication of the synthetic CaO sorbent, in an attempt to enhance its mechanical strength and improve its chemical properties.