Periyavaram Sudheekar Reddy, Uppala Lavakumar, Sivaprakash Srinivasan, Reddy P Hari Prasad
Department of Civil Engineering, National Institute of Technology, Warangal, India.
Department of Chemical Engineering, National Institute of Technology, Warangal, India.
Bioresour Technol. 2023 Apr;373:128734. doi: 10.1016/j.biortech.2023.128734. Epub 2023 Feb 13.
The effect of leachate (L) as a reaction medium in hydrothermal carbonization (HTC) of food waste (FW) on the thermal behaviour of the resulting hydrochar (H) was investigated. The physicochemical and structural characterization of FW hydrochar produced using leachate (FWH-L) at different process temperatures (180/210/240 °C) confirmed the improved properties over raw FW. Kinetic analysis using Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS) and Friedman methods revealed that FWH-L have a lower activation energy (E) than raw FW. The average E values for raw FW by FWO, KAS and Friedman methods were 196.18, 196.85, 206.34 kJ/mol, respectively, while for FWH-L they were 127.89, 124.22 and 134.5 kJ/mol, respectively. The computed thermodynamic parameters showed that FWH-L has improved combustion behaviour. The results of FWH-L are well comparable to FW hydrochar produced using distilled water (FWH-DW). These findings demonstrated that residual ions in leachate would act as a catalyst, benefiting the HTC degradation reaction path.
研究了渗滤液（L）作为餐厨垃圾（FW）水热碳化（HTC）反应介质对所得水炭（H）热行为的影响。在不同工艺温度（180/210/240℃）下使用渗滤液制备的餐厨垃圾水炭（FWH-L）的物理化学和结构表征证实，其性能优于原生餐厨垃圾。使用弗林-沃尔-小泽（FWO）、基辛格-赤平-角野（KAS）和弗里德曼方法进行的动力学分析表明，FWH-L的活化能（E）低于原生餐厨垃圾。FWO、KAS和弗里德曼方法计算的原生餐厨垃圾的平均E值分别为196.18、196.85、206.34kJ/mol，而FWH-L的平均E值分别为127.89、124.22和134.5kJ/mol。计算得到的热力学参数表明，FWH-L的燃烧性能有所改善。FWH-L的结果与使用蒸馏水制备的餐厨垃圾水炭（FWH-DW）具有良好的可比性。这些发现表明，渗滤液中的残留离子将起到催化剂的作用，有利于HTC降解反应路径。
