Paper details

Title:

Study of the Influence of Total Pressure on Products Yields in Fluidized Bed Gasification of Wood Sawdust

Author(s):

Valin, S., Ravel, S., Guillaudeau, J., Thiery, S.

Document(s):

Abstract:

Wood sawdust gasification experiments were performed in a steam fluidized bed at 800°C between 2 and 10 bar. An evolution of gas yields with time was measured during the tests, and especially an increase of hydrogen and carbon dioxide yields, and a decrease of hydrocarbons (C2Hn, benzene) yields. This test duration effect was ascribed to char build­up in the bed. As tests proceed, the contribution of char steam gasification to gas yield increases, and the catalytic effect of char on hydrocarbons and tar conversion is enhanced. As total pressure increases from 2 to 10 bar, hydrogen, carbon dioxide and methane yields increase by 16%, 53% and 38% respectively, whereas carbon monoxide yield decreases by 33%. The increase of methane yield with pressure is suggested to be linked to a change in secondary pyrolysis reactions scheme under high pressure.

Keywords:

fluidized bed, gasification, methane, steam, yield

Topic:

Thermochemical conversion - Gasification for synthesis gas production

Subtopic:

Syngas production. Reaction and technologies

Event:

18th European Biomass Conference and Exhibition

Session:

OB4.5

Pages:

782 - 786

ISBN-13:

978-88-89407-56-1

ISBN-10:

88-89407-56-5

Paper DOI:

10.5071/18thEUBCE2010-OB4.5

Price:

FREE