C8芳烃临氢异构化模拟系统ISOXSIM

开发了Ｃ８ 芳烃异构化过程模拟系统ＩＳＯＸＳＩＭ。该系统的核心是一个详尽的反应动力学模型，将对装置技术经济有显著影响的各种反应包括于其中。根据不同催化剂在不同工况下的试验数据对模型动力学参数作了调整。模拟计算的结果表明，模拟计算的误差范围与试验数据的误差范围相当。ＩＳＯＸＳＩＭ 用三个迭代环的算法使系统的非线性微分方程组得以收敛。在最内环，联立求解系统的物料平衡；在中环，使反应器出口的组分流率收敛；在外环，调整操作参数以达到设计型给定。该算法求解系统物料平衡远比序贯法有效，且仅用一次计算就可满足用户的设计给定，提高了用户的工作效率。

A SIMULATION SYSTEM ISOXSIM FOR HYSOMER OF C_8 AROMATICS

A hysomer process simulation system ISOXSIM for C 8 aromatics has been developed. The core of the simulation system is an extensive reaction kinetic model. Nearly all the factors having significant impacts on the process economics and performance have been accounted for. Laboratory data on different catalysts and under various experimental conditions were used to adjust the parameters of the kinetic model. Simulation results showed that the precision of the method was well within the range of experimental errors. In ISOXSIM the algorithm used for solving the process model is of three iterative loops, where the inner loop solves the system balance equations, while the middle loop converging the reactor component yields, and the outer loop matching the design specifications. This algorithm is far efficient in solving the mass balance equations than the conventional sequential approach, and able to meet user's design specifications with a single run.