Thermodynamic equilibrium calculations of the volatilization and condensation of inorganics during wood gasification

► Steam gasification of wood was studied by a dual approach (thermodynamic, measurement). ► Speciation of 26 elements was calculated versus temperature, pressure and reactor technology. ► Speciation of the main gas is calculated to be N2, H2S, KOH and KCl with trace of HCl. ► Cooling calculations predicted K2CO3 followed by KCl as the main condensate compounds. ► Some agreements with tests exist for N, S, Cl, Al, Ca, Mg, Mn but no conclusion for K, Na, P.