Pyrolysis of maize, sunflower, grape and tobacco residues

Pyrolysis of four agricultural residues (maize, sunflower, grape and tobacco) has been carried out in order to quantify their energy content. The main characteristics of the charcoals formed and the nature and quantity of gases produced have been determined. The process was studied batchwise by vary...

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Bibliographic Details
Published in:Journal of chemical technology and biotechnology (1986) 1997-12, Vol.70 (4), p.400-410
Main Authors: Encinar, J.M, Beltran, F.J, Gonzalez, J.F, Moreno, M.J
Format: Article
Language:English
Subjects:
agricultural residues
agricultural wastes
Applied sciences
Biomass
Energy
energy content
Exact sciences and technology
gas-solid reaction kinetics
Helianthus annuus
Natural energy
Nicotiana tabacum
pyrolysis
temperature
Vitis vinifera
Zea mays
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Summary:Pyrolysis of four agricultural residues (maize, sunflower, grape and tobacco) has been carried out in order to quantify their energy content. The main characteristics of the charcoals formed and the nature and quantity of gases produced have been determined. The process was studied batchwise by varying the reaction time (15–60 min) and temperature (400–700°C). Reaction times higher than 30 min do not exert any influence while increasing temperature yields high fixed carbon solids, low volatile content and slight increases in ash. The increase in temperature is specially important to increase the production of gas, mainly hydrogen. From gas composition and proximate analysis, the heating power of gas and solid phases have been determined. A kinetic model of pyrolysis based on gas generation has been accomplished. From this model, rate constants of gas formation at different temperatures and activation energies have also been determined. ©1997 SCI
ISSN:0268-2575
1097-4660
DOI:10.1002/(SICI)1097-4660(199712)70:4<400::AID-JCTB797>3.0.CO;2-6