optimization of sugarcane bagasse ash processing for application as a selective solar material

摘要

Sugarcane bagasse (CBC) ash becomes an alternative in the search for initiatives that allow the development of technologies and methodologies for the application of materials aimed at renewable energy sources. This invention aims to add value to cbc by optimizing its processing with high energy screening and grinding, aiming at its application as a selective solar material. In this sense, three different grinding parameters were used: ball loading (5: 1, 10: 1 and 15: 1), grinding time (20 and 30 minutes) and grinding speed (200 rpm, 250 rpm and 300 rpm). The results showed that the high energy grinding, with the adopted parameters, allowed smaller grain fineness and more homogeneity in all the ashes, which favored an improvement of the efficiency of the global radiation absorption in the solar spectrum region and thus the they presented potential for application as selective solar material, given the adequacy of their properties, especially the physicochemical, thermal, optical and microstructural properties.