Gas–liquid mass transfer in a rotor–stator spinning disc reactor

Multistage rotor‐stator spinning disc reactor

“…The gas bubbles are sheared off at the gas inlet, due to the velocity gradient; the gas bubble size decreases with increasing rotational disc speed, leading to an increase in gas-liquid mass transfer. 1 The volumetric gas-liquid mass transfer coefficient increases with increasing rotor radius, up to 2.5 m 3 L m À3 R s À1 , at a rotational disc speed of 209 rad s À1 , using a rotor with 0.135 m radius and 1 mm rotor-stator distance (Meeuwse et al, submitted). The energy dissipation rate, however, increases more than the mass transfer rate; scaling up by stacking multiple rotor-stator units in series is therefore, from energetic point of view, preferred over scaling up in rotor size.…”

“…The rotor-stator spinning disc reactor is a new type of multiphase reactor, which shows high mass transfer rates compared with conventional equipment [1][2][3] (Meeuwse et al, submitted). The rotor-stator spinning disc reactor consists of a rotating disc, enclosed in a cylindrical housing.…”

“…In the second case, gas and liquid are fed together to the spinning disc reactor. 2 Meeuwse et al 1 describe the gas-liquid mass transfer in case of a single gas inlet in the bottom stator. The gas bubbles are sheared off at the gas inlet, due to the velocity gradient; the gas bubble size decreases with increasing rotational disc speed, leading to an increase in gas-liquid mass transfer.…”

CFD Numerical Simulation of Biodiesel Synthesis in a Spinning Disc Reactor

“…Significant enhancements in polymerisation rates have been obtained within thin films generated on the rotating reaction surface, compared to classical stirred tank reactors. Continuous production of nano-and micro-size particles via reactive crystallisation in SDRs has also been reported (Dehkordi and Vafaeimanesh, 2009;Leveson et al, 2003;Meeuwse et al, 2010;Tai et al, 2006;Tai et al, 2007). Spinning disc reactors also have the potential for the intensification of both gas-liquid operations (Meeuwse et al, 2010) and liquid-liquid reactions (Dehkordi, 2002) due to their excellent mass transfer and uniform micro mixing characteristics.…”

“…Continuous production of nano-and micro-size particles via reactive crystallisation in SDRs has also been reported (Dehkordi and Vafaeimanesh, 2009;Leveson et al, 2003;Meeuwse et al, 2010;Tai et al, 2006;Tai et al, 2007). Spinning disc reactors also have the potential for the intensification of both gas-liquid operations (Meeuwse et al, 2010) and liquid-liquid reactions (Dehkordi, 2002) due to their excellent mass transfer and uniform micro mixing characteristics. Extensive mass transfer studies using SDR have shown that mass transfer coefficient values in liquid-liquid system as high as 30×10 -5 ms -1 can be achieved due to the mentioned micromixing and an appropriate fluid dynamic environment for achieving faster reaction kinetics (Jachuck, 2002).…”