Environmental Engineering Department, Süleyman Demirel University, Isparta, Turkey.
Mechanical Engineering Department, Süleyman Demirel University, Isparta, Turkey.
Environ Sci Pollut Res Int. 2021 Dec;28(45):63894-63904. doi: 10.1007/s11356-021-12732-0. Epub 2021 Feb 4.
In this study, thermogravimetric analysis (TGA) was performed under the air environment for four different heating rates (10, 20, 30, and 40 °C min) in order to find out thermal degradation and mechanisms of the chicken manure, a Turkish lignite, and their blends (25 lignite + 75 manure, 50 lignite + 50 manure, and 75 lignite + 25 manure). To calculate thermal kinetics and responsible solid-state mechanisms of the samples, the Flynn-Wall-Ozawa and Coats-Redfern methods were applied. Significant differences between Turkish lignite and chicken manure samples were observed in terms of thermal kinetics and mechanisms. D1 and D4 mechanisms were found to be the responsible mechanisms for the main oxidation region of the lignite and chicken manure/blends, respectively. A similar decreasing trend for the calculated activation energies and pre-exponential constants was observed with increasing biomass content in the manure blends from 25 to 75% by both Flynn-Wall-Ozawa and Coats-Redfern methods. Furthermore, biomass content has an effect on the mechanisms of chicken manure blends during the combustion. D3 was found to be the responsible solid-state mechanism for the third regions (pre-combustion of the manure) of the chicken manure samples. However, D1 and D2 mechanisms were found to be responsible mechanisms for the blends.
在这项研究中，在空气环境下以四种不同的升温速率（10、20、30 和 40°C min）进行了热重分析（TGA），以找出鸡粪、土耳其褐煤及其混合物（25%褐煤+75%鸡粪、50%褐煤+50%鸡粪和 75%褐煤+25%鸡粪）的热降解和机理。为了计算样品的热动力学和负责的固态机理，应用了 Flynn-Wall-Ozawa 和 Coats-Redfern 方法。土耳其褐煤和鸡粪样品在热动力学和机理方面表现出显著差异。D1 和 D4 机制被发现分别是褐煤和鸡粪/混合物主要氧化区域的负责机制。通过 Flynn-Wall-Ozawa 和 Coats-Redfern 方法，随着鸡粪混合物中生物质含量从 25%增加到 75%，计算出的活化能和指前因子常数呈相似的下降趋势。此外，生物质含量对鸡粪混合物在燃烧过程中的机理有影响。D3 被发现是鸡粪样品第三个区域（鸡粪的预燃烧）的负责固态机制。然而，D1 和 D2 机制被发现是混合物的负责机制。
