Abstract
This paper reports that the continuous solidification/stabilization of a simulated aqueous hazardous waste steam through microencapsulation in a polyester matrix was evaluated in a static mixer/reactor and found to be feasible. For the emulsion formation step, the Sauter mean droplet size of the emulsion formed was found to vary with the stream total flow rate to the -0.87 power, the number of mixing elements to the -0.63 power, and the volume fraction of waste to the 0.2 power. Next, numerical simulation of the polymerization reaction step for the conditions investigated predicted that the degree of polymerization occurring inside the mixer/reactor was only on the order of a safe and desirable 0.2% of the total conversion, thus ensuring the absence of any premature gelling within the mixer/reactor; also, this resulted in only a negligible fluid temperature rise, these being verified by experimental observations and measurements. On these bases, exothermicity and solidification of the stream inside the mixer/reactor are hence not expected to be processing problems.
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