【摘要】 文章以市政污泥（MS）、聚丙烯塑料（PP）、聚对苯二甲酸乙二醇酯塑料（PET）为原料，研究了添加塑料对污泥热解特性及产物分布的影响。利用热重分析法和Coats-Redfern积分法获得了MS/PP,MS/PET共热解时的质量变化情况和动力学特性，并采用热裂解-气相色谱质谱联用技术分析了共热解产物组分。结果表明：MS/PP,MS/PET共热解的协同效应使热解向低温区偏移，热解转化率有所提升；MS/PP,MS/PET共热解所需的表观活化能低于污泥单独热解，掺混PP,PET对高温区重质分子热解所需表观活化能的降低程度更大；与污泥单独热解相比，MS/PP共热解提高了C30+有机物和脂肪烃的相对含量，MS/PET共热解主要提高了C10～C15产物的相对含量，且醇类有机物、脂肪烃和芳香烃的相对含量显著增加。更多还原

【Abstract】 This study employed municipal sludge（MS）, polypropylene（PP）, and polyethylene terephthalate（PET） as feedstocks to investigate the effects of plastic co-feeding on the pyrolysis characteristics and product distribution of MS. The mass changes and kinetic properties associated with the co-pyrolysis of MS/PP and MS/PET blends were obtained by thermogravimetric analysis coupled with the Coats-Redfern integral method. Additionally, the compositions of the resulting co-pyrolysis products were analyzed by pyrolysis-gas chromatography/mass spectrometry（Py-GC/MS）. The results indicated that the synergistic effects observed during the co-pyrolysis of MS/PP and MS/PET shifted the pyrolysis process toward lower temperatures and enhanced the overall conversion efficiency. The apparent activation energy required for the co-pyrolysis of both MS/PP and MS/PET blends was lower than that for MS mono-pyrolysis. Moreover,the addition of PP and PET led to a more pronounced reduction in the apparent activation energy associated with the pyrolysis of heavy molecular-weight species in the high-temperature region. Compared to the mono-pyrolysis of MS, co-pyrolysis of MS/PP increased the relative contents of C₃₀₊ organics and aliphatic hydrocarbons, whereas co-pyrolysis of MS/PET not only primarily enhanced the relative yield of C10 ～C15 products, but also increased the relative contents of alcohols, aliphatic and aromatic hydrocarbons.更多还原