Co-Pyrolysis of Sewage Sludge, Two-Component Special Municipal Waste and Plastic Waste

IF 3 4区工程技术 Q3 ENERGY & FUELS

Energies Pub Date : 2024-07-26 DOI:10.3390/en17153696

Szabina Tomasek, Norbert Miskolczi

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Abstract

In this study, the co-pyrolysis of sewage sludge (SS), two-component special municipal waste (SMW) and plastic waste (Plastic) was studied using thermogravimetric equipment and a scaled-up tubular reactor. During the experiments, the effects of the raw material composition and pyrolysis temperature on the decomposition processes, the product yields and compositions were investigated. It was found that co-pyrolysis was a series of complex reactions and resulted in more volatile and lower residue yield than the pyrolysis of the individual raw materials. In some cases (e.g., 25%SMW + 75%Plastic, 25%SS + 75%Plastic, 50%SS + 50%Plastic blends), it also caused a higher synthesis gas yield and H2/CO ratio. During the thermogravimetric analysis, the beneficial effects occurred at lower temperatures, but in the scaled-up experiments, these effects only prevailed at 900 °C as a result of the larger amount of raw materials and the worse heat transfer. The produced gases can be characterized by a lower heating value of 17.3–35 MJ/Nm3. Therefore, they can be used for energetic purposes; however, before chemical use, further quality improvement is needed due to the lower H2/CO ratios.

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污水污泥、双组分特殊城市废物和塑料废物的共热解作用

本研究使用热重设备和放大管式反应器研究了污水污泥（SS）、双组分特殊市政废物（SMW）和塑料废物（Plastic）的共热解。在实验过程中，研究了原料成分和热解温度对分解过程、产品产量和成分的影响。结果发现，共热解是一系列复杂的反应，与单个原料的热解相比，共热解产生的挥发性更强，残留物产量更低。在某些情况下（例如，25%SMW + 75%Plastic, 25%SS + 75%Plastic, 50%SS + 50%Plastic 混合物），共热解还能产生更高的合成气产量和 H2/CO 比率。在热重分析过程中，有利的影响出现在较低的温度下，但在放大实验中，这些影响只出现在 900 °C 时，原因是原料用量较大，传热较差。产生的气体热值较低，为 17.3-35 兆焦耳/立方米。因此，这些气体可用于能源目的；但是，由于 H2/CO 比率较低，在用于化学之前，需要进一步提高质量。

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来源期刊

Energies ENERGY & FUELS-

CiteScore

6.20

自引率

21.90%

发文量

8045

审稿时长

1.9 months

期刊介绍： Energies (ISSN 1996-1073) is an open access journal of related scientific research, technology development and policy and management studies. It publishes reviews, regular research papers, and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.