Laboratory of Alternative Fuels & Sustainability, School of Chemical & Materials Engineering, National University of Sciences & Technology, 44000, H-12, Islamabad, Pakistan.
Department of Chemical and Materials Engineering, King Abdulaziz University, Rabigh, 21911, Saudi Arabia.
Chemosphere. 2023 Oct;337:139226. doi: 10.1016/j.chemosphere.2023.139226. Epub 2023 Jun 26.
In the leather industry, tannery sludge is produced in large volume. This study investigated the thermal degradation behavior of tannery sludge using thermogravimetric analysis (TGA). The experiments were carried out in an inert atmosphere using nitrogen gas at varied heating rates of 5, 10, 20, and 40 °C/min in the temperature range of 30-900 °C. For the kinetic parameters calculation, three different models, Friedman, Kissinger-Akahira-Sunose (KAS) and the Ozawa-Flynn-Wall (OFW), were employed. The average activation energy (E) obtained from Friedman, KAS, and the OFW methods were 130.9 kJ mol, 143.14 kJ mol, and 147.19 kJ mol respectively. Along with that, experiment of pyrolysis was accomplished in fixed bed reactor (FBR) at temperature of 400 °C. Biochar produced from FBR had a yield of about 71%. The analysis of gas chromatography-mass spectroscopy shows the different chemical compounds present in the bio-oil containing hydrocarbons (alkanes and alkenes), oxygen containing compounds (alcohols, aldehyde, ketones, esters carboxylic acids and the esters) and the nitrogen containing compounds. The kinetic assessment was complemented by distributed activation energy model (DAEM). In the pyrolysis of tannery sludge six pseudo-components were found to be involved. Furthermore, artificial neural network (ANN) was used to predict the activation energy from conversion, temperature, and the heating rate data. MLP-3-11-1 (Multilayer Perceptrons) described well the conversion behavior of tannery sludge pyrolysis.
在制革行业，会产生大量的制革污泥。本研究采用热重分析（TGA）研究了制革污泥的热降解行为。实验在惰性气氛中使用氮气进行，加热速率分别为 5、10、20 和 40°C/min，温度范围为 30-900°C。为了计算动力学参数，使用了三种不同的模型，即弗里德曼（Friedman）、 Kissinger-Akahira-Sunose（KAS）和 Ozawa-Flynn-Wall（OFW）。从弗里德曼、KAS 和 OFW 方法得到的平均活化能（E）分别为 130.9 kJ/mol、143.14 kJ/mol 和 147.19 kJ/mol。此外，在 400°C 的固定床反应器（FBR）中进行了热解实验。FBR 产生的生物炭产率约为 71%。气相色谱-质谱分析表明，生物油中含有烃类（烷烃和烯烃）、含氧化合物（醇、醛、酮、酯、羧酸和酯）和含氮化合物等不同的化学物质。通过分布式活化能模型（DAEM）对动力学评估进行了补充。在制革污泥的热解过程中，发现有六个拟组分参与。此外，还使用人工神经网络（ANN）根据转化率、温度和加热速率数据来预测活化能。MLP-3-11-1（多层感知器）很好地描述了制革污泥热解的转化行为。
Zotero 插件