Background:
It is well known that the main energy generation sources are still gas, oil, and fossil
fuels all over the world. Pollution has led to global warming, melting ice in the
South and North poles, the rising of sea and ocean levels, and climate change.
Therefore, researchers are increasingly focusing on finding appropriate and optimal
methods for gas treatment, especially carbon dioxide emissions. All technologies
have their own advantages and disadvantages when used alone; therefore, to reduce
the drawbacks, several intensification approaches are simultaneously applied. Song
et al. called these “hybrid processes”. Other techniques include the formulation of
solvents and process intensification tools such as centrifugal, vibration, mixing,
nanoparticle, and magnetic field applications. Process intensification (PI) helps to
reduce equipment size, energy consumption, and effluents. and allows the systems
to be compacted in smaller areas with innovations. Rotating packed beds (RPBs)
are a type of PI equipment that uses centrifugal acceleration. Another alternative PI
approach, which was mentioned above, is the use of nanofluids (NFs) that include
the suspension of nanoparticles in a base fluid (BF) that can transfer heat and
improve MT operations. It is clear that RPBs have a larger surface area than
conventional PBCs in the same operation conditions. Because of the advantages,
RPBs are still designed and developed on laboratory and industrial scales.
Generally, this topic is treated and developed in four directions of examination of
chemical solvents, optimization of RPB operations by improving contact surface
area or mass transfer by changing the hydrodynamic features and modifications.
Aim: The effect of alumina nanofluid on mass performance in carbon dioxide
absorption process in the presence of the gravity field by RPB experimentaly
studied and hydrodynamics evelutaed by CFD simulation.
Methodology: At first, background of subject reviewed in the two field