Investigation on Prospective Energy Power from Corncob Husk Biomass and its Biochars by Kinetic Parameters and Isoconversional Models

The biofuel properties of biomass play an important role in achieving their utilization on agro-systems and industries. In this context the biomass waste of maize, corncob husk, and its biochars were taken into account to be investigated by thermogravimetric analysis, thermodynamic parameters for non-isothermal analyses using the Ozawa-Flynn-Wall kinetic isoconversional model in order to comprehend its possible fuels features. It was also investigated the compounds generated after pyrolysis and their relation with oxidation reactions for the safe-handling and storage. It was found that corncob husk biochar produced at 300 °C shows the best qualities as a solid biofuel, since it requires less energy input through pyrolysis to be produced. Finally, analysing the compounds generated and remained on the biochar’s surface, by Fourier transform infrared spectroscopy (FTIR) analysis, biochars produced at low temperatures present one of the lowest features prone to oxidation reactions.

生物质的生物燃料特性，对其在农业系统与工业领域的应用推广具有重要意义。在此研究背景下，本研究选取玉米生物质废料——玉米芯壳及其生物炭（biochar）作为研究对象，采用热重分析法（thermogravimetric analysis），结合Ozawa-Flynn-Wall动力学等转化率模型开展非等温分析以获取热力学参数，旨在明晰其作为潜在燃料的性能特征。同时，本研究还对热解过程中生成的产物及其与氧化反应的关联进行了探究，为该类材料的安全操作与储存提供理论依据。研究结果显示，在300℃下制备的玉米芯壳生物炭具备最优的固体生物燃料性能，因其热解制备过程所需的能量输入更低。最后，通过傅里叶变换红外光谱（Fourier transform infrared spectroscopy, FTIR）对生物炭表面生成与残留的产物进行分析后发现，低温制备的生物炭是氧化反应倾向性最低的生物炭之一。