The dynamic behaviour of a non-ideal non-isothermal tubular reactor is modelled in order to predict the variation of concentration and temperature, with respect to both axial distance along the reactor and flow time. The heat is generated by dispersion from a first-order reaction.
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The problem involves the two independent variable, time and length. The distance variable can be eliminated by finite differencing the reactor into N equal sized segments (N=8 in this model) of length delZ such that N*delz = L (total length of the reactor).
Assumptions
The above reaction is assumed to be a first order reaction.
The effect of temperature and composition on the value of specific heat capacity is ignored. However, this can be taken into account by modelling a block for Cp(T, composition) and then incorporating such a block in the model given below.
The reactor length is broken into 8 segments here. Thus if the length of reactor is quite large , the user might consider breaking the length into more no. of segments to get a better result and that would imply building in more of the component mass balance and energy balance blocks.
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