Abstract:

Isomerization is a key step in ethylene production. In this paper，a mathematical model of the isomerization reactor is established. Simulation shows that the residence time is insufficient and conversion is low，highly coupling preheat and reaction lead to a narrow operation range and poor stability in the isomerization unit. The simulation is consistent with the unit condition. Optimal design of isomerization reactor is carried out by decoupling it to a pre-heater and an isomerization reactor. Optimal design shows that operation stability of the isomerization reactor is significantly enhanced，temperature runaway of reactor is controlled，side reaction is reduced and conversion is improved. And in the new isomerization process，reaction heat can be used to preheat feed stock so as to reduce energy consumption.