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Isoconversional kinetic analysis of co-combustion of sewage sludge with straw and coal

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  • Xiao, Han-min
  • Ma, Xiao-qian
  • Lai, Zhi-yi

Abstract

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.

Suggested Citation

  • Xiao, Han-min & Ma, Xiao-qian & Lai, Zhi-yi, 2009. "Isoconversional kinetic analysis of co-combustion of sewage sludge with straw and coal," Applied Energy, Elsevier, vol. 86(9), pages 1741-1745, September.
    • Handle: RePEc:eee:appene:v:86:y:2009:i:9:p:1741-1745
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    References listed on IDEAS

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    1. Nadziakiewicz, Jan & Koziol, Michal, 2003. "Co-combustion of sludge with coal," Applied Energy, Elsevier, vol. 75(3-4), pages 239-248, July.
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