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

Abstract

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°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, H₂, 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.

Keywords:

• fluidized bed
• pyrolysis
• rice husk
• steam
• temperature

Additional information

Funding

The authors are grateful to the National Basic Research Program (973 Program No. 2007CB210206) of the Ministry of Science and Technology of China.