Karaeva Julia, Timofeeva Svetlana, Islamova Svetlana, Slobozhaninova Marina, Oleynikova Ekaterina, Sidorkina Olga
Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences, 420111 Kazan, Russia.
Molecules. 2025 Aug 23;30(17):3471. doi: 10.3390/molecules30173471.
Amaranth is important for the agro-industrial complex. However, when extracting flour and oil from seeds, a lot of waste remains. Waste recycling by co-pyrolysis aims at obtaining new products with high added value. This study examined a combination of (AC) residues and low-density polyethylene (LDPE) waste. The addition of polymer was aimed at obtaining hydrocarbon-rich pyrolysis liquid and biochar. Pyrolysis was performed on an experimental setup, along with thermogravimetry-Fourier infrared spectroscopy-gas chromatography mass spectrometry (TG-FTIR-GC MS), to examine the thermochemical conversion. Experiments were carried out using a thermogravimetric analyzer at heating rates of 5, 10, and 20 °C/min. The average activation energy values for the pyrolysis of the AC/LDPE blend by the Ozawa-Flynn-Wall (OFW) and Kissinger-Akahira-Sunose (KAS) techniques were 301.39 kJ/mol and 287.69 kJ/mol, respectively. A visual examination of the correlations of the kinetic parameters of AC/LDPE was carried out using the Kriging method. The pyrolysis liquid from AC contains 38.14% hydrocarbons, with the main part being aliphatic hydrocarbons. During the pyrolysis of the AC/LDPE mixture, hydrocarbons were found in the resinous and waxy organic fractions of the pyrolysis liquid. The composition and properties of AC and AC/LDPE biochar are similar, and they can both be applied to agriculture.
苋属植物对农业产业综合体很重要。然而，从种子中提取面粉和油时，会产生大量废弃物。通过共热解进行废弃物回收旨在获得具有高附加值的新产品。本研究考察了活性炭（AC）残渣与低密度聚乙烯（LDPE）废弃物的组合。添加聚合物的目的是获得富含烃类的热解液和生物炭。在实验装置上进行热解，并结合热重-傅里叶红外光谱-气相色谱质谱联用仪（TG-FTIR-GC MS）来研究热化学转化。使用热重分析仪在5、10和20℃/分钟的升温速率下进行实验。采用小泽-弗林-沃尔（OFW）法和基辛格-赤平-ose（KAS）法计算得出AC/LDPE混合物热解的平均活化能值分别为301.39 kJ/mol和287.69 kJ/mol。利用克里金法对AC/LDPE动力学参数的相关性进行了直观分析。AC热解液中烃类含量为38.14%，主要为脂肪烃。在AC/LDPE混合物热解过程中，热解液的树脂状和蜡状有机馏分中发现了烃类。AC和AC/LDPE生物炭的组成和性质相似，二者均可应用于农业。
