An investigation of the droplet size distributions in a cyclone reactor for liquid‐liquid heterogeneous reactions using FBRM and PVM

Abstract

A multi‐element process coupled cyclone reactor for the liquid‐liquid heterogeneous reaction was proposed. This paper presents the investigation of dispersed phase droplet size distributions near the wall surface using FBRM and PVM. To translate a chord length distribution (CLD) measured by the FBRM instrument into its droplet size distribution (DSD), a CLD‐DSD transformation model was proposed. Moreover, the effects of operational parameters on the droplet size distributions were studied. The results show that the total inlet flow plays a decisive role on the dispersed phase droplet size distributions, while the influence of feed ratio is mainly reflected in inhibiting the probability of droplet coalescence. In comparison, the influence of overflow ratio on the droplet size distributions can be neglected.

Experimental Investigation on Single‐Droplet Deformation and Breakup in a Concave‐Wall Jet

“…The droplet size distribution of dispersed-phase droplets near the wall in a cyclone was studied by Zhang et al [44]. The conclusion was that the increase of the inlet flow rate caused a higher turbulence intensity, which aggravated the droplet breakage process.…”

Oil-Water Two-Phase Flow with Three Different Crude Oils: Flow Structure, Droplet Size and Viscosity

“…It is found that the droplet size is an important factor in determining the rheology and stability of dispersed flow [12,21]. In recent years, several methods have been applied to measure droplet size in tubes, such as the conductance probe method [22,23], the dynamic light scattering technique [24][25][26], the focused beam reflection measurement (FBRM) [27], and particle video microscopy (PVM) [28], and Brown and Pitt [29] and Chatzi and Kiparisside [30] pointed out that the droplet size distribution was affected by the dispersed phase fraction. The experimental results of Vankova et al [31] showed that the size of oil droplets in o/w emulsions changed with the oil volume fraction when the water volume content was less than 50%.…”

Improved H2SO4‐catalyzed alkylation reaction in a rotating packed bed reactor by adding additives

“…The alkylation process occurs either in the acid phase or at the liquid-liquid interface. [18,19] The classic carbonium ion mechanism is commonly accepted as an alkylation kinetics mechanism, and Figure 1 shows a simplified kinetics network. [20,21] Sun et al [21] investigated some alkylation kinetics coefficients in a stirred tank reactor (STR).…”