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International Journal of Energy for a Clean Environment
SJR: 0.195 SNIP: 0.435 CiteScore™: 0.74

ISSN 印刷: 2150-3621
ISSN オンライン: 2150-363X

International Journal of Energy for a Clean Environment

Formerly Known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.2011002039
pages 203-215

CONSIDERATIONS ON EXPERIMENTAL STUDIES OF VEGETABLE CHAR COMBUSTION IN FLUIDIZED BED

N. Rangel
Centro de Estudos de Fenуmenos de Transporte (CEFT), Departamento de Engenharia Mecвnica (DEMec), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
Carlos Pinho
CEFT-DEMEC, Faculdade de Engenharia da Universidade do Porto, Porto, Portugal

要約

This paper reports some experimental aspects of the combustion of batches of vegetable chars in a fluidized-bed laboratory reactor at temperatures of 600, 700, and 750°C. Data on the volumic concentrations of carbon oxides and volatile organic compounds along the combustion process are presented and discussed. Tests show that the carbon conversion rate is not only due to combustion, but there are pyrolysis phenomena that accompany it and contribute to the global conversion rate of the carbon. The burned-out and consumed mass fractions of carbon were determined, and it was observed that these two quantities differ, particularly for lower bed temperatures. Vegetable chars when suffering combustion in low-temperature fluidized beds release tars in the form of vapors that escape from the bed without burning.