Abstract
Abstract In this paper, the combustion behavior of municipal solid waste (MSW) is carried out in a thermogravimetric analyzer under different N 2 /O 2 and CO 2 /O 2 atmospheres with temperature ranging from 100 °C to 1000 °C. TG (thermogravimetric) and DTG (derivative thermogravimetric) curves are analyzed. The n th order reaction fitting model is used to yield the activation energy of reduction process according to the degree of conversion. The results indicate that all samples lose most their weight between 200 °C and 540 °C. As the oxygen concentration increased, conversion rate curves and DTG curves shift to lower temperature without significant change in its shape. At the same oxygen concentration, the peak values in CO 2 /O 2 atmosphere are smaller than those in N 2 /O 2 atmosphere, indicating that CO 2 has a higher inhibitory effect than N 2 on MSW combustion. After 600 °C, the weight loss peak appears much later in CO 2 /O 2 atmosphere than it does in N 2 /O 2 atmosphere. With the increase of heating rate, the maximum weight loss rates of samples increase obviously. The three-step reaction of n th order reaction model fits the weight loss very well.
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