Most microdroplet reactor downtime traces back to a short list of recurring issues. Organizing them by symptom, likely cause and direct fix turns vague frustration into a checklist. Here are the ones that come up most.
Symptom: large droplets or visible coalescence. Causes: surfactant depletion, pressure fluctuation, clogged generator, liquid composition drift. Fixes: replace or refresh the liquid phase, stabilize gas supply pressure, clean the dispersion element, and re-verify the recipe.
Symptom: pulsing flows, drifting ratios. Causes: regulator drift, partial blockage, bubbles in the liquid line. Fixes: re-regulate at the source, backflush the restrictor, and re-prime the liquid circuit until bubble-free.
Symptom: falling apparent rates with unchanged parameters. Causes: fouled optical window, aged lamp, shifted alignment. Fixes: clean or replace the window per schedule, check lamp hours against the intensity log, and re-align then re-measure intensity at the dispersion.
Symptom: products appearing in blank runs. Causes: adsorbed residues in tubing or separator. Fixes: extended purge with carrier, replace wettable sections, and run a full blank before the next campaign, not after.
Weekly: window inspection, leak check, flow verification. Monthly: dispersion element cleaning, seal inspection, standard-injection check of the analysis train. Logged: lamp hours, intensity checks, every disassembly. A reactor with a logbook fails predictably and fixes quickly; one without does neither.
See instrument maintenance guides and reaction systems for support information.
