Investigation of hydrogen production using wood pellets gasification with steam at high temperature over 800 °C to 1435 °C

A fixed-bed gasifier was developed to study the effects of steam flow rate and temperature on the hydrogen production during biomass gasification at high temperature over 800 °C to 1435 °C. An optimum steam flow rate for peak of hydrogen yield was found. As temperature increases, amount of hydrogen increases first, subsequently decreases and then increases again with a maximum peak of hydrogen yield at 917 °C. In the temperatures of 1018 °C through 1435 °C post the peak hydrogen production increases with temperature. The maximum volume fraction of hydrogen and hydrogen production ratio are 60% and 76%, respectively. Chemical equilibrium calculation was also done using ASPEN software, which demonstrates that the more the steam flow rate, the lower the temperature for maximum hydrogen yield; the higher the temperature, the lower the effect of steam flow rate. The results are expected to develop high temperature gasification technology.