Sensitivity embedded homotopy-based backtracking method for chemical process simulation

Considering the constant fluctuation of raw material costs and user demand, frequent and wide-range off-design operation is necessary. The process simulation with equation-oriented approach at multiple operation conditions is difficult because of the complexity and nonlinearity of chemical processes. In this study, the homotopy-based backtracking method (HBM) for simulation is modified with prediction step, which can be calculated by applying sensitivity analysis. The theory foundation for the proposed sensitivity embedded homotopy-based backtracking method (S-HBM) is established. Numerical results of the argon sidearm column show that the performance of S-HBM is better than that of HBM.