Paper details

Title:

Gasification of Torrefied Biomass with Carbon Dioxide in a Fluidized Bed

Author(s):

Wu, K-T., Shih, Y-S., Yang, K-C., Manatura, K.

Document(s):

Abstract:

Biomass torrefaction at mild pyrolysis temperature is usually applied to improve the fuel quality of biomass. However, removal of a large amount of volatiles after torrefaction, torrefied biomass gasification with air cannot enhance the syngas production. Therefore, applying the Boudouard reaction, gasification of torrefied biomass with CO2 at higher temperature could improve the syngas quality. In this study, gasification of torrefied biomass with CO2 was carried out in a 30 kWth bubbling fluidized bed gasifier to investigate the effects of the air equivalence ratios (ER) and gasification temperatures on the syngas components, the higher heating value (HHV) and tar content. The preliminary results show that the syngas content of CO2 increased with increasing the ER, but that of H2, CO, CH4 shows the contrary results. In addition, at higher temperature above 800oC, gasification with CO2 can enhance CO concentration compared with the air-blown gasification process, due to the Boudouard reaction for the higher carbon content of torrefied biomass.

Keywords:

biomass, gasification, torrefaction, fluidized bed, carbon dioxide CO₂

Topic:

Biomass Conversion Technologies for Heating, Cooling and Electricity

Subtopic:

Gasification for synthesis gas production

Event:

24th European Biomass Conference and Exhibition

Session:

2CV.3.42

Pages:

900 - 902

ISBN:

978-88-89407-165

Paper DOI:

10.5071/24thEUBCE2016-2CV.3.42

Price:

FREE