Energy efficient production of glass-ceramics using photovoltaic (P/V) glass and lignite fly ash.
Energy efficient production of glass-ceramics using photovoltaic (P/V) glass and lignite fly ash.
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DOI：
10.1016/j.wasman.2019.04.022
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发表时间：
2019-04
期刊：
影响因子：
8.1
通讯作者：
V. Savvilotidou;A. Kritikaki;A. Stratakis;K. Komnitsas;E. Gidarakos
中科院分区：
文献类型：
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作者：
V. Savvilotidou;A. Kritikaki;A. Stratakis;K. Komnitsas;E. Gidarakos
本研究探讨了一种创新的方法，用于稳定能源部门和微晶玻璃生产中产生的特定废物的价值。使用的废物是可再生能源部门生产的光电玻璃和传统能源部门生产的褐煤粉煤灰。该方法首先涉及在使用加热显微镜显示的1200 °C下熔融特定的废物混合物（即（i）70% P/V玻璃和30%褐煤粉煤灰，以及（ii）80% P/V玻璃和20%褐煤粉煤灰）1小时后生产玻璃。结果表明，P/V玻璃作为一种富含钠-钾的无机废物，降低了熔化过程的能量需求。然后将生产的玻璃用于生产玻璃陶瓷。在800 °C下对玻璃进行控制热处理后，可制得致密、均匀的微晶玻璃，具有高的化学稳定性和无毒性。对所制备的微晶玻璃的机械性能（抗压强度、维氏硬度）和物理性能（开孔率、体积密度和吸水率）进行了评价。采用X射线衍射（XRD）和能量色散X射线荧光（ED-XRF）对原料和制备的微晶玻璃进行了表征。扫描电子显微镜（SEM）提供了对最终产品微观结构的进一步了解。所生产的玻璃陶瓷的性质，即吸水性和抗压强度，使它们适合在建筑行业中的应用。本研究所采用的废物价值化方法符合循环经济的原则。
This study investigates an innovative approach for the valorization of specific wastes generated from the energy sector and the production of glass-ceramics. The wastes used were photovoltaic (P/V) glass, produced from the renewable energy sector, and lignite fly ash, produced from the conventional energy sector. The process first involved the production of glass after melting specific mixtures of wastes, namely (i) 70% P/V glass and 30% lignite fly ash, and (ii) 80% P/V glass and 20% lignite fly ash, at 1200 °C for 1 h as revealed by the use of a heating microscope. The results indicated that the P/V glass, as a sodium-potassium-rich inorganic waste, reduces energy requirements of the melting process. The produced glass was then used for the production of glass-ceramics. Dense and homogeneous glass-ceramics, exhibiting high chemical stability and no toxicity, were produced after controlled thermal treatment of glass at 800 °C. The mechanical (compressive strength, Vickers hardness) and physical (open porosity, bulk density and water absorption) properties of the produced glass-ceramics were evaluated. X-ray diffraction (XRD) and Energy Dispersive X-ray fluorescence (ED-XRF) were used for the characterization of the raw materials and the produced glass-ceramics. Scanning electron microscopy (SEM) provided further insights on the microstructure of the final products. The properties of the produced glass-ceramics, namely water absorption and compressive strength, render them suitable for applications in the construction industry. The waste valorization approach followed in this study is in line with the principles of circular economy.