Abstract
In the HyPr-RING method for hydrogen production from coal by using a single reactor, CO_2 absorption by CaO combined coal gasification in gasifier. Accordingly, addition of CaO in coal mixture may influence gasification reactivity of coal, since CaO was reported as catalysis for coal gasification. In this study, coal or char, and coal or char/CaO mixture were gasified with high pressure steam by using a flow-type reactor. It was found that, with CaO addition the hydrogen produced from coal or char gasification was higher about 10-20% than that from coal or char only gasification. Lignite and sub-bituminous coals had higher conversion to hydrogen than that of the high rank coals.
