Heated experimental reactor zero

TNA PRO AB 17/84. Heated Experimental Reactor Zero Energy (HERO). TNA PRO AB 17/86. The Windscale Advanced Gas-cooled Reactor. 

HERO Heated Experimental Reactor (0) Zero Energy... 

Sunderland (1974) showed that for a frequency of reciprocation of 50 cps, the reactor demonstrated nonideal macromixing only for amplitudes of reciprocation approaching zero. Experiments with the oxidation of o-xylene indicated that the reactor effectively minimized heat and mass transfer contributions to overall reaction rate, but the proper evaluation of extent of effectiveness requires further experimental measurements of heat and mass transfer coefficients (fluid-solid) for varying rates of reciprocation of the piston. 

The only unknown parameter left in Eq. (o) is the tortuosity factor, r. This factor was determined from a comparison between the experimental rate at zero coke content, measured in a differential reactor and the surface fluxes. The latter were calculated using Pick s law and for a given t from the concentration profiles obtained by numerical integration of the system (Eqs. (g), (h), (i), and (j)). A value of T = 5 led to the best fit of all six experiments. This is the generally accepted value for the tortuosity factor in a catalyst of the type used in this work. It was also possible to calculate an effectiveness factor from these results. A value of 0.20 was obtained for a particle radius of 2.3 mm at 550°C. The Bischoff general modulus approach, presented in Chapter 3, leads to a value ofO.28. Finally, the heat transfer coefficients were calculated from the correlation of Handley and Heggs, mentioned in Chapter 3. 

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