Table . The hydrogen production efficiency at different gasification temperatures. The time span that hydrogen content more than 1% in the syngas (H2>1 time span) and the hydrogen production in the H2>1 time span. The reaction rate was calculated from the H2 production in the H2>1% time span divided by the length of H2>1 time span. The studies by and also suggested that the steam flow greatly influences the syngas generation patterns of biomass materials gasification. Next, 300 o C-pyrolyzed ZMS was used for gasification at 900 o C with a steam supply at a rate of 1-5 mL/min, and the syngas generation profiles throughout the reaction process were recorded. As shown in Fig. and Table , the CO2/CO value was positively associated with the increase in the steam supply.