Desulfurization in the gas-continuous impinging stream gas–liquid reactor

Mass Transfer Performance of a Water-Sparged Aerocyclone Reactor and Its Application in Wastewater Treatment

“…Therefore, the obvious increase in the K L a when the air flow rate was over 1.4 l/s may be caused by the combinational effect of this two reasons, showing clearly the effect of a highly rotating air field enhancing mass transfer between phases. In fact, from the viewpoint of the dispersed and continuous phases, the gas-liquid mass transfer process in the WSA is similar with that in the impinging stream gas-liquid reactor (ISGLR), which enhances mass transfer using two opposite impinging streams (Wu et al, 2007). In the ISGLR, there is also a critical point of impinging velocity, 10 m/s.…”

“…The effect of impinging velocity on the pressure drop increases rapidly before this critical point, and after that the effect becomes slower. The reason for this is not quite clear yet, but it is possible that a conversion of a flow pattern occurs at this point (Wu et al, 2007). Likely, the rapid increase of the mass transfer coefficient in the WSA after the critical point may be also caused by a conversion of flow patterns occurring at this point, but this needs to be further investigated.…”

“…Making a comparison among these devices, the WSA, ISGLR and RPB, all have essentially the same ability of enhancing the mass transfer between the gas and liquid phases. WSA and ISGLR have no moving parts, whereas RPB is rotating at a considerably high speed, and needs a higher cost and maintenance fee, and possibly has a short lifetime (Wu et al, 2007). In addition, WSA has the advantage of a simple structure, easy operation, low cost and higher mass transfer efficiency.…”

“…Now there are two kinds of devices that can also enhance mass transfer very efficiently, i.e. ISGLR (Wu et al, 2007) and the rotating packed bed (RPB) (Chen et al,1999;Munjal & Dudukovic, 1989a;Munjal & Dudukovic, 1989b). Making a comparison among these devices, the WSA, ISGLR and RPB, all have essentially the same ability of enhancing the mass transfer between the gas and liquid phases.…”

Features of Impinging Streams Intensifying Processes and Their Applications

“…So many data obtained by various researchers have shown that heat and mass transfer coefficients in GIS can be higher than those in traditional devices by over 10 or, sometimes, even by several decade times. Huang et al [8] and Wu et al [9], in their investigations into circulative impinging stream drying (ISD) and desulfurization of flue gas in the impinging stream gas-liquid reactor (ISGLR), respectively, obtained newer experimental evidences The former showed the values for volumetric heat transfer coefficient in ISD being higher than in spray dryer by over 10 times; while the latter demonstrated the values of 0.58 to 1.04 s −1 for the same parameter in ISGLR, which are equivalent to or a little higher than those in rotary packed bed (RPB), another kind of well-known device also enhancing transfer very efficiently, and the detailed data have been reported in [9].…”