Acrylonitrile Process Enhancement through Waste Minimization: Effect of Reaction Conditions and Degree of Backmixing

Waste minimization in reactor design is an effective approach for pollution control, when compared to the traditional practice of end-of-pipe treatment. Reactor degree backmixing and operating conditions are important factors that determine performance chemical process, including environmental impact. For purpose waste minimization, two modeling methods were used simulating acrylonitrile production reactor, based on ammoxidation propylene. The effect residence time, temperature, steady-state propylene conversion, determined. tanks-in-series model axial dispersion account backmixing. main by-products process acetonitrile hydrogen cyanide, which both highly toxic waste. Extensive reduces especially at high temperature time. Minimum favored by low moderate no cyanide At 450 °C, percentage increase selectivity acrylonitrile, with respect plug-flow conditions, as a continuous stirred tank 87.1, 74.3, 50.9, 30.4, 12.4% time 1, 2, 4, 6, 8 s, respectively. affect friendliness process.