Abstract
To evaluate spent mushroom beds (log and sawdust beds) as a two-step gasification resource, carbonization of spent mushroom beds for the production of char and gasification of the chars were performed using a small laboratory system. Carbonization of the mushroom beds at 600 °C produced suitable chars as the source for steam gasification. In addition, the wood gas produced during the carbonization process had a sufficient higher heating value and thus could be used as the fuel for the gasification step. The gasification of the spent bed chars produced clean hydrogen-rich gases without generation of any by-products. On the other hand, direct gasification of a waste log bed generated hydrocarbon and tar-like materials. Furthermore, the water-gas reaction (C + H2O → CO + H2) was proposed as the mechanism for the gasification process.
