Spray absorption of CO2 into monoethanolamine: Mass transfer coefficients, dropsize, and planar surface area

Interfacial area measurements and surface area quantification for spray absorption

“…The high degree of turbulence results in rapid absorption of CO 2 in the liquid. Similar findings have been reported previously in the works of Sherwood et al [21] and Tamhankar et al [25].…”

“…This large difference between a s and a e suggests that the contribution of cumulative drop surface area to the observed absorption rates is negligible. As explained earlier, a large degree of mass transfer is observed in the region immediately downstream of the nozzle tip [21,25]. High degree of turbulence and rapid liquid sheet or jet break-up during the process of atomization result in the large degree of mass transfer in the region around the nozzle tip [14,21].…”

“…In this work, the Planar Surface Area (P SA ) at two axial planes is calculated based on the procedure of Tamhankar et al [24], Tamhankar et al [25] and is an improvement on the previously published method [23]. Each plane is comprised of three, equidistant, concentric zones, similar to work outlined by Bade and Schick [4].…”

Performance of a Monofiber Optical Probe in Determining the Droplet Size and Velocity in Spray Systems Compared with a High-Speed Camera

“…Gas absorption using spray columns is now a frequently applied process in various applications, including the removal of volatile organic compounds (VOCs), hydrogen sulfide (H 2 S), nitrogen oxide (NO X ) , sulfur dioxide (SO 2 ), and carbon dioxide (CO 2 ) from contaminated gases (Bashipour et al, 2015;Raghunath and Mondal, 2016;Tamhankar et al, 2015;Tatin et al, 2015). In spray systems, the hydrodynamics of droplets play an important role in controlling the absorption efficiency of the sprays because the droplet sizes and velocities directly affect the interfacial area available for absorption (Roustan, 2003).…”

“…Gas absorption using spray columns is now a frequently applied process in various applications, including the removal of volatile organic compounds (VOCs), hydrogen sulfide (H 2 S), nitrogen oxide (NO x ) , sulfur dioxide (SO 2 ), and carbon dioxide (CO 2 ) from contaminated gases. − In spray systems, the hydrodynamics of droplets play an important role in controlling the absorption efficiency of the sprays because the droplet sizes and velocities directly affect the interfacial area available for absorption . If a spray system is to be understood and utilized efficiently, then droplet size and velocity distributions need to be characterized. , Various studies have proposed their mechanisms of droplet formation, including droplet sizes and velocities, , and have been further used for simulation, optimization, and design of the processes. , So far, the optical techniques of phase-doppler anemometry (PDA), droplet tracking velocimetry (DTV), or high-speed cameras have been successfully used to determine droplet sizes and velocities. − However, most of the optical techniques encounter difficulties when used with dense spray or in conditions of poor visibility; only a few techniques showed promising results, for instance, optical flow estimation …”