Abastract
Combustion of Aluminium is a key area of study. It plays a vital role in combustion processes, especially in propulsion systems. Its reactivity and explosive nature make it a sought-after material. This review summarizes research on aluminium combustion. It looks at what affects the combustion process. The study of aluminium combustion covers how it burns. This involves complex chemical reactions and physical processes. Studies show that the size of the aluminium particles and the amount of oxygen matter a lot. They influence how easily and quickly aluminium ignites. Smaller particles and more oxygen led to faster ignition and shorter burn times. Aluminium combustion is used in many industries. It is in rocket propellants for space, metallurgy, and materials that release energy. Thus, it helps in aerospace, automotive, defense, and materials science advancements.
Introduction
Aluminium (Al) is a lightweight and strong metal that doesn’t rust easily. It is used in solid fuels, fireworks, and to make hydrogen. Its burning process is important and is widely studied. Adding tiny aluminium particles helps make hybrid rocket motors work better. However, Beryllium is not used even though it burns hot. This is because it creates very dangerous byproducts.
When boron burns, it creates a layer of boron oxide on its surface. This layer slows down its burning. Aluminium, on the other hand, is common, safe to use, has a lot of energy for its size, and burns very hot [84 kJ/cm³]. Using very small aluminium particles in fuel helps it burn better and prevents the particles from sticking together. The smaller the particles, the quicker they catch fire, according to the d²–t law.
Nano-sized aluminium particles are tiny. They burn faster and more easily than larger, micro-sized particles. They need a lower temperature, about 727°C, to ignite. This is because their protective layer breaks down quicker.
As the particles get bigger, they release energy more slowly. Heating them a lot can make them catch fire quicker.
These tiny particles make energy come out quickly and shorten the time it takes to start burning and to burn up. But their use in solid fuel is not widespread because of a tricky Al₂O₃ coating. This coating makes it harder to process the fuel and lowers its quality and power.
This review examines combustion of Aluminium, its key factors, and its uses. We’ll look into past research to see what affects its burning. We’re also interested in how it affects industries and science. We’ll pay close attention to particle size, temperature, and oxygen levels. We aim to examine what determines Aluminium’s ignition temperature and burning duration.
To read the full article please visit https://entechonline.com/combustion-of-aluminium-particles-a-short-review-apr-2024-afra-and-dr-hashim/
