Abstract
In this work, concentrated solar energy (CSE) was applied to an energy-intensive process such as the vitrification of waste with the aim of manufacturing glasses. Different types of waste were used as raw materials: a hazardous waste from the aluminum industry as aluminum source; two residues from the food industry (eggshell and mussel shell) and dolomite ore as calcium source; quartz sand was also employed as glass network former. The use of CSE allowed obtaining glasses in the SiO2-Al2O3-CaO system at exposure time as short as 15 min. The raw materials, their mixtures, and the resulting glasses were characterized by means of X-ray fluorescence, X-ray diffraction, and differential thermal analysis. The feasibility of combining a renewable energy, as solar energy and different waste for the manufacture of glasses, would highly contribute to circular economy and environmental sustainability.
Highlights
In recent decades, great efforts are being conducted to use of renewable and less polluting energy systems in energy-intensive demanding processes, in intent of reducing greenhouse gas emissions into the atmosphere
Raw Materialsof the raw materials used to prepare the mixtures to be melted by concentrated solar energy (CSE), is collected in of
The results of this study indicate the ability of the use of concentrated solar energy to manufacture glasses formulated from different waste materials as raw materials
Summary
Great efforts are being conducted to use of renewable and less polluting energy systems in energy-intensive demanding processes, in intent of reducing greenhouse gas emissions into the atmosphere. In this regard, special attention is being focused on the application of concentrated solar energy (CSE) to high temperature production processes [1]. Nowadays, according to the American National Oceanic and Atmospheric Administration, 414 ppm of global CO2 was recorded for February 2021 [3] Upon this alarming situation, changes in the production systems must be highly considered, specially taking into consideration the United Nations
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