Paper details

Title:

Characterization of Fast Pyrolysis of Biomass Wastes using a Heated Grid Reactor: Nitrogen Chemistry and Reactor Modeling

Author(s):

Giuntoli, J., Gout, J., Verkooijen, A.H.M., de Jong, W.

Document(s):

Abstract:

Increasing needs for lowering carbon emissions and diversifying energy supply make biomass residues an important resource for the production of power and heat. In this paper two residues of liquid biofuels production were tested: dry distiller’s grains & solubles (DDGS) and palm kernel cake (PKC). Both these materials present high nitrogen and inorganic content, which could cause issues such as high NOx emissions, slagging and fouling. The fuels were tested in a heated grid reactor in fast pyrolysis conditions: the setup allowed the study of the fuels under different heating rates (600-1000°C/s) and final temperatures (500°C ÷ 1300°C). Weight loss and yields of main N volatile compounds were measured. The speed of the phenomena involved does not allow for detailed measurement of process conditions in the reactor, therefore, a numerical model was implemented and validated against a non­contact temperature measurement. The model allowed detection of possible zones of high temperature in the reactor volume, the presence of gradients on the grid surface and in the biomass pill. Finally, additional temperature measurements carried out with an infrared pyrometer on the grid indicated a significant difference between the actual temperature and the thermocouple reading.

Keywords:

fast pyrolysis, modelling, NOx emission, modeling, biofuels residues

Topic:

Thermochemical conversion - Pyrolysis for power, CHP, polygeneration and chemicals

Subtopic:

Characterisation and modelling of pyrolysis processes

Event:

18th European Biomass Conference and Exhibition

Session:

OB5.5

Pages:

931 - 939

ISBN-13:

978-88-89407-56-1

ISBN-10:

88-89407-56-5

Paper DOI:

10.5071/18thEUBCE2010-OB5.5

Price:

FREE