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Combustion kinetics of agricultural wastes
Author(s) -
Encinar José M.,
Beltrán Fernando J.,
Ramiro Antonio,
González Juan F.,
Bernalte Alvaro
Publication year - 1995
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280640211
Subject(s) - partial pressure , combustion , oxygen , chemistry , activation energy , kinetics , order of reaction , thermodynamics , limiting oxygen concentration , analytical chemistry (journal) , materials science , reaction rate constant , environmental chemistry , organic chemistry , physics , quantum mechanics
The combustion of two agricultural residues, grape and olive bagasses, has been studied. The influence of oxygen partial pressure and gas flow rate have been analysed. The analysis of residual gases, mainly containing CO and CO 2 , shows that there are two successive stages or effects owing to the combustions of volatile compounds and solid. Oxygen partial pressure has a pronounced influence on the temperatures at which combustion effects are observed. In fact, both temperatures of combustion coincide when oxygen partial pressure is higher than 5 × 10 4 pa. For each run, curves of weight loss and differential weight loss have been followed. From a kinetic model proposed (first and nth reaction order, between 0·87 and 0·84, with respect to the solid and oxygen, respectively), the activation energy of combustion was found to be between 82·6 and 89·3 kJ mol −1