Determination of Interfacial Area and Overall Volumetric Mass-Transfer Coefficient in a Novel Type of Two Impinging Streams Reactor by Chemical Method

The theory of mass transfer accompanied by chemical reaction for gas−liquid systems was used to measure the effective interfacial area ( a ) and the overall volumetric mass-transfer coefficient ( k L a ) in a new two impinging streams reactor (TISR), which is characterized by a high-intensity mixing chamber equipped with two two-phase nozzles directed toward each other. As a result of both the impinging process and high rate shear forces exerted on the gas and liquid phases, the overall volumetric mass-transfer coefficients of up to 0.41 s −1, and the mass-transfer coefficients ( k L ) of up to 15 × 10 −4 m/s have been obtained. In addition, the influences of gas and liquid flow rates on the k L a and a values obtained in the TISR have been investigated. These experimental results verify the capability of the proposed TISR in gas−liquid operations. Furthermore, on the basis of the experimental results obtained, two correlations for both the Sherwood number for the liquid phase ( Sh L ) and the specific interfacial area ( a ) in terms of Froude, Reynolds, Schmidt, and Morton numbers have been derived.