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Combustion Characteristics of Nanoaluminum Cloud in Different Atmospheres

Sun, Yunlan, Sun, Rong, Zhu, Baozhong, Wu, Yuxin, Wang, Qichang, Han, Weikang
Industrial & engineering chemistry process design and development 2018 v.57 no.1 pp. 129-138
X-ray diffraction, air, aluminum, aluminum oxide, carbon dioxide, combustion, oxygen, process design, quartz, scanning electron microscopy, temperature
The flame propagation of nanoaluminum cloud in different atmospheres such as CO₂, air, and O₂ was experimentally studied in a transparent quartz tube. Measurements of the flame length, height, propagation velocity, and temperature indicate that these parameters undergo regular changes in different atmospheres. The maximum measured temperature in CO₂ was lower than that in air. On the basis of these results, the flame propagation mechanism of a nanoaluminum cloud is discussed. Scanning electron microscopy revealed that the combustion products consist of uniform spherical particles. On the other hand, the X-ray diffraction analysis indicated the presence of Al, γ-Al₂O₃, θ-Al₂O₃, and α-Al₂O₃ in the combustion products of nanoaluminum cloud in air and the existence of Al, θ-Al₂O₃, α-Al₂O₃, and Al₂OC when the cloud burns in CO₂.