In this paper, TG-DSC experiments were designed to study the characteristic of sludge treated with various doses of microwave radiation. By means of Coats-Redfern, dynamics calculations were carried out. The experiments showed that reaction depth was improved by microwave radiation. When microwave-induced sludge samples were treated with the doses of 10 W/g, 20 W/g and 25 W/g, the mean active energy dropped by 19.2 kJ/(mol ? K), 2.6 kJ/(mol ? K)and 12.7 kJ/(mol ? K), and the mass-loss rates increased by 4.6%, 5.7% and 11.6%, respectively. Microwave radiation had a slight impact on reaction rank in the experiments. It was improved that the addition of 5% wheat stalk or wood chips could give a boost to the pyrolysis under heating rate of 10 K/min, with 4.7% and 8.9% promotion of TGmax by the experiment.%通过TG-DSC实验,研究微波辐射对污泥热解特性的影响,与污泥-生物质混合热解特性作对比,并利用Coats-Redfern积分法计算出污泥热分解反应的表观活化能、反应级数及指前因子.结果表明,在辐射剂量为10 W/g、20 W/g和25 W/g的条件下,污泥TG实验的失重率分别提高了4.6％、5.7％和1 1.6％;热解反应的活化能分别降低了19.2 kJ/(mol·K)、2.6 kJ/(mol·K)、12.7 kJ/(mol·K),平均降低了24％,反应级数略有变化.在10 K/min升温速率下,添加质量分数为5％的木屑或麦秆,污泥热解失重率分别为4.7％和8.9％.
展开▼
