Influence of Temperature on Properties of Products from Steam Pyrolysis of Rice Husk in a Fluidized Bed

Fast steam pyrolysis of rice husk was performed in a fluidized bed reactor. The pyrolysis conditions of the feed rate of rice husk at 12 kg/h, the feed rate of steam at 9 kg/h, and the vapor residence time of 0.62 sec were kept constant, and the pyrolysis temperature was varied from 430 to 630 degrees C to investigate its influences on properties of the produced gas, liquid bio-oil, and solid char. Results showed that the components in the gaseous product (including CO2, CO, CH4, H-2, etc.) were evidently affected by the temperature. Fourier transform infrared analysis was employed to research into the changing trend of the organic groups existing in the produced chars and bio-oils. Furthermore, detailed components in the bio-oils obtained under different temperatures were determined by gas chromatography-mass spectrometry analysis.