Toluene Semi-intermittent Period Of Nitrification Enlarge

The reaction calorimeter RC1e was used as an efficient tool for 1000 times scaling up of mononitration of toluene in the precondition of inherent safety in this paper. Firstly, heat transfer coefficients of toluene, water, propanol, glycerol and ethylene glycol were measured at various agitator speeds in RC1e reactor respectively to draw wilson curves and then the thermal conductivity, viscosity and specific heat were measured to calculate material characteristic V. So the reactor constant a was gained from V and the slopeβof wilson curve separately. Secondly, heat transfer coefficients of reaction of mononitration of toluene were measured at various agitator speeds and to draw wilson curves in the same way. Known the slopeβand constant a, the material characteristic V of reaction was calculated, and so was the heat transfer coefficient of the reactant hr₁. On the base of geometry similarity of lab and plant reactors and the best stirring speed in plant resulted from considering the influence of mixing, the transfer coefficient of plant reactants hr_B was deduced from hr₁. Joined with the thermal resistances of cooling medium and the reactor wall in plant computed from empirical relations, the overall heat transfer U_B was calculated. It resulted 580 W/m²K which was close to the engineering data 581 W/m²K. The kinetic model was built from thermal and kinetic data measured from RC1e and the order and activation energy were calculated. Combining the analytic results from thermodynamics, kinetics and mixing theory, the design of industrial reactor and technical parameters were decided on the base of balance of energy and material. The heat exchange area was 3.77m²; the maximal heat generation rate was 58.84kW; the productivity was 120kg/h and so on. The thermal hazard assessment was derived after the calculation and analysis of the adiabatic temperature increaseΔT_ad, maximal temperature attainable MTSR in a runaway situation and the thermal stability. The result of scaling up was proved to be safe and reliable.