Striani Raffaella, Stasi Enrica, Giuri Antonella, Seiti Miriam, Ferraris Eleonora, Esposito Corcione Carola
Dipartimento di Ingegneria dell'Innovazione Università del Salento, 73100 Lecce, Italy.
Department of Mechanical Engineering, Campus de Nayer, KU Leuven, 2860 Sint-Katelijne-Waver, Belgium.
Nanomaterials (Basel). 2021 Feb 25;11(3):577. doi: 10.3390/nano11030577.
In this study, an original and green procedure to produce water-based solutions containing nanometric recycled carbon particles is proposed. The nanometric particles are obtained starting from carbon waste ashes, produced by the wooden biomass pyro-gasification plant CMD (Costruzioni motori diesel) ECO20. The latter is an integrated system combining a downdraft gasifier, a spark-ignition internal combustion engine, an electric generator and syngas cleaning devices, and it can produce electric and thermal power up to 20 kWe and 40 kWth. The carbon-based ashes (CA) produced by the CMD ECO20 plant were, first, characterized by using differential scanning calorimetry (DSC) and microcomputed tomography (microCT). Afterward, they were reduced in powder by using a milling mortar and analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectrometry, thermogravimetric analysis (TGA), X-ray diffraction (WAXD) and Fourier-transform infrared (FTIR) spectroscopy. The optimization of an original procedure to reduce the dimensions of the ashes in an aqueous solution was then developed by using ball milling and sonication techniques, and the nanometric dimensions of the particles dispersed in water were estimated by dynamic light scattering (DLS) measurements in the order of 300 nm. Finally, possible industrial applications for the nanomaterials obtained from the waste ashes are suggested, including, for example, inks for Aerosol Jet Printing (AJ P).
在本研究中，提出了一种原始的绿色方法来制备含有纳米级回收碳颗粒的水性溶液。纳米颗粒是从由木质生物质热解气化厂CMD（Costruzioni motori diesel）ECO20产生的碳废渣灰中获得的。后者是一个集成系统，结合了下行式气化炉、火花点火式内燃机、发电机和合成气净化装置，能够产生高达20千瓦电力和40千瓦热能。首先，使用差示扫描量热法（DSC）和微型计算机断层扫描（microCT）对CMD ECO20工厂产生的碳基灰分（CA）进行表征。之后，使用研磨钵将其磨成粉末，并通过扫描电子显微镜（SEM）、能量色散X射线（EDX）光谱、热重分析（TGA）、X射线衍射（WAXD）和傅里叶变换红外（FTIR）光谱进行分析。然后，通过使用球磨和超声处理技术，开发了一种优化的原始方法来减小水溶液中灰分的尺寸，并通过动态光散射（DLS）测量估计分散在水中的颗粒的纳米尺寸约为300纳米。最后，提出了从废渣灰中获得的纳米材料的可能工业应用，例如包括用于气溶胶喷射印刷（AJ P）的油墨。
