Isoconversional kinetic analysis of co-combustion of sewage sludge with straw and coal
In this paper, the co-combustion behaviour of sewage sludge with straw and coal were carried out in a thermogravimetric analyzer under different atmospheres and at different heating rates (10, 20 and 40 K min-1) in the temperature range from ambient temperature to 1000 °C. TG and DTG curves were analysed. The Flynn-Wall-Ozawa's (FWO) and Kissinger-Akahira-Sunose's (KAS) isoconversional methods were used to yield dependency of the activation energy of reduction process on the degree of conversion. The values of E[alpha] were obtained. The results indicate that: with the increase of heating rate, the maximum weight loss rate of samples increase obviously. The activation energy is practically constant in the 0.2 [less-than-or-equals, slant] [alpha] [less-than-or-equals, slant] 0.9 range, with the average values of E[alpha] = 137.27 and 132.38 kJ mol-1 calculated by FWO and KAS methods, respectively.
Year of publication: |
2009
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Authors: | Xiao, Han-min ; Ma, Xiao-qian ; Lai, Zhi-yi |
Published in: |
Applied Energy. - Elsevier, ISSN 0306-2619. - Vol. 86.2009, 9, p. 1741-1745
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Publisher: |
Elsevier |
Keywords: | Co-combustion Sewage sludge Straw Thermogravimetry Isoconversional |
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