LAUSR

Abstract Simulation of Shell entrained-flow, heavy-residue gasifiers (SHERG) are challenging because of diverse homogenous and heterogeneous reactions involved in the gasification process and the complicated flow-field distribution. An integrated continuous stirred-tank reactor (CSTR) and plug flow reactor (PFR) model is proposed to describe the computationally efficient simulation of SHERG. The CSTR zone is determined by the results of computational flow dynamics. The proposed model is validated by comparing simulation results with industrial data. Meanwhile, a serial-CSTR model is applied to model the gasifier. The simulation results show that the accuracy of proposed model is higher than that of the serial-CSTR model. Moreover, comparison of the central processing unit time for solving the model reveals that the computational performance of the proposed model is superior than that of the serial-CSTR model. On the basis of the proposed model, different ratios of O2/oil and steam/oil for optimization of the gasifier operation are investigated.