Influence of feeding ratio on steam gasification of palm shells in a rotary kiln pilot plant. Experimental and numerical investigations

Numerical results showed that the gas energy content decreases as the SBR increases as well, achieving a maximum value for SBR = 0.6 that produced a gas which volumetric composition N2 free is H2 = 40.4%, CO = 24.1%, CO2 = 21.7%, CH4 = 12.2%, C2H4 = 1.7% and in correspondence of which the lower heating value (LHV) is equal to 12 MJ m−3 in normal conditions. SBR values higher than 0.6 do not produce a further increase of the gas yield, rather require a greater amount of input energy for heating the steam from the room temperature to the process temperature.