Thermogravimetric analysis of the co-pyrolysis of a bituminous coal and pulp mill sludge

Thermal valorization of organic wastes by co-processing with coal may be a management option for such wastes. In this work, the separate pyrolysis of coal and primary and secondary pulp mill sludge was assessed by thermogravimetric (TG) analysis. Then, under the same experimental conditions, the pyr...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2015-12, Vol.122 (3), p.1385-1394
Main Authors: Coimbra, R. N., Paniagua, S., Escapa, C., Calvo, L. F., Otero, M.
Format: Article
Language:English
Subjects:
Activation energy
Analysis
Analytical Chemistry
Bituminous coal
Blends
Chemistry
Chemistry and Materials Science
Coal
Combustion
Devolatilization
Inorganic Chemistry
Mathematical analysis
Measurement Science and Instrumentation
Mills
Paper industry
Paper mills
Physical Chemistry
Polymer Sciences
Pulp industry
Pyrolysis
Sludge
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Summary:Thermal valorization of organic wastes by co-processing with coal may be a management option for such wastes. In this work, the separate pyrolysis of coal and primary and secondary pulp mill sludge was assessed by thermogravimetric (TG) analysis. Then, under the same experimental conditions, the pyrolysis TG curves of the coal blends with a 10 mass% of either primary or secondary pulp mill sludge were obtained. The corresponding differential thermogravimetry curves made evident that the devolatilization of coal starts at higher temperature and reaches higher char yields than that of primary or secondary paper mill sludge. Under blending, lower devolatilization temperatures and char yields, close to the weighted calculated ones, are observed. Non-isothermal kinetic analysis showed that the Arrhenius activation energy ( E ) corresponding to the pyrolysis of coal was lower than that corresponding to either L1 or L2. Moreover, lower E than the weighted calculated ones was determined for the co-pyrolysis of the blends.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-015-4834-3