Study of the Influence of Total Pressure on Products Yields in Fluidized Bed Gasification of Wood Sawdust

S. Valin, S. Ravel, J. Guillaudeau & S. Thiery
Wood sawdust gasification experiments were performed in a steam fluidized bed at 800°C between 2 and 10 bar. An evolution of gas yields with time was measured during the tests, and especially an increase of hydrogen and carbon dioxide yields, and a decrease of hydrocarbons (C2Hn, benzene) yields. This test duration effect was ascribed to char build­up in the bed. As tests proceed, the contribution of char steam gasification to gas yield increases, and the...