Since there is a throttle, the temperature of the stream coming from the reactor will be reduced further to less than 200 oC. Since calculating the temperature after the throttle needs additional design specifications such as the reactor length and diameter, this will be done afterwards in the design section. The temperature is chosen through an educated decision based upon stream load and literature reference of the same plant to be less than 200 oC because the throttle is serving the temperature decrease service. The chosen temperature is 165 oC.
We have four streams, the temperature of the two inlets streams are 20 and 164 oC for reaction product and water stream respectively. The outlet temperature has calculated as follow: .