As part of a research project, I've been asked to design an industrial scale model for the synthesis of titania nanowires. These are currently being produced at a scale of 500 g every three days (being that it takes three days for the nanowires to morph using the given method). My director has asked me to scale this up by 10 to 5 kg daily and design a continuous, steady state process fit for commercial purposes. The original challenge I ran into was the "continuous" aspect of the design. Given the 72 hour duration for the material chemistry to take place, it seemed highly difficult to somehow run the process continuously at steady-state rather than batch. Upon further brainstorming, however, I determined that if I could get the reactants flowing through some sort of contraption that started at point A and got to point B in a three days length with enough turbulent flow to drive the reaction, then, indeed, a continuous, steady state process may be possible. I decided upon the plug flow reactor, which seems to best along the lines of what I need to accomplish this. One of my curiosities has to do with how well PFR's work with solid-liquid mixtures, and also if these come with extensive lengths of pipe or tubing to conduct material for three days? Any ideas/suggestions would be appreciated.