Abstract

The kinetic characteristics of the oxidation of non-food municipal MSW (MSW) were studied. Energetically valuable components of non-food MSW (sawdust, plastics, cardboard, textiles, leather, and rubber) were used as test samples. The elemental composition and technical characteristics of the test samples were determined using an elemental analyzer and standard procedures. The thermal conversion of non-food MSW was carried out using thermogravimetric analysis in the oxidation mode at a heating rate of 10 K/min in a temperature range of 25–800°C at atmospheric pressure. According to thermal analysis data (DTG curves), the process stages of the oxidation of non-food MSW, which correspond to the mono- or bimodal evolution of volatile compounds and the oxidation of the resulting carbon residue, were determined. The qualitative analysis of the gas-phase products of non-food MSW oxidation was performed by mass spectrometry, and the results were compared with the elemental composition and technical characteristics of the test samples. The activation energies of the stages of non-food MSW oxidation were calculated using the Coats–Redfern method. The maximum value of E_a (114.7 kJ/mol) was observed in a plastic sample, the decomposition of which tentatively proceeded in a single stage.

中文翻译：

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非食品类生活垃圾氧化的动力学特征

摘要

研究了非食品类城市生活垃圾（MSW）的氧化动力学特征。非食品垃圾中具有能源价值的成分（木屑，塑料，纸板，纺织品，皮革和橡胶）用作测试样品。使用元素分析仪和标准程序确定测试样品的元素组成和技术特性。非食品垃圾的热转化是通过热重分析在氧化模式下以大气压在25-800°C的温度范围内以10 K / min的加热速率进行的。根据热分析数据（DTG曲线），确定了非食品MSW氧化的过程阶段，其对应于挥发性化合物的单峰或双峰演变以及所得碳残留物的氧化。通过质谱法对非食品类MSW氧化的气相产物进行了定性分析，并将结果与​​测试样品的元素组成和技术特性进行了比较。使用Coats–Redfern方法计算了非食品MSW氧化阶段的活化能。最大值在塑料样品中观察到E _a（114.7 kJ / mol），其分解暂定在一个阶段进行。