The process begins with the first phase of a process: the reactor feed preparation. This begins with combining 108.7 kmol/hr of a fresh stream of toluene at 25oC, and 1.9 bar, with a recycle stream of unreacted toluene in a storage tank TK-1 at 112oC and 2.43 bar. Toluene is then pumped through pump P-1, the discharge pressure of the pump must be 25.5 bar, this is pumped to a second storage tank TK-2 where toluene is combined with a combined stream of fresh and recycle of hydrogen. The new two-phase stream is preheated in E-1 to 163.9oC, high pressure steam at 45 barg is used for this purpose. The stream exists the pre-heater as a one-phase stream because the toluene was vaporized. The stream is then introduced into the heater, H-1, this fired heater is a type of furnace which uses air to combust fuel gas to produce enough heat to raise the temperature of the stream to 600oC. The reactor feed preparation has now been completed. The stream is at the desired pressure, 24.81 bar, and temperature, 600oC, necessary for the reaction to occur.