Gtl(Gas to Liquids) Process Optimization Simulation Study

Yong Heon Kim1, Heoung Yeoun Lee1, Ki-Won Jun2, Hyunku Joo3, Chonghun Han4, and In Kyu Song4. (1) Petroleum Technology Insititute, Korea National Oil Corporation, 1588-14 Gwanyang Dong, An Yang, 431-711, South Korea, (2) Alternative Chemicals/Fuel Research Center, Korea Research Institute of Chemical Technology, 100 Jang-dong, Yuseong-gu, Daejeon, 305-343, South Korea, (3) Air Pollution Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yusong-ku, Daejeon, 305-343, South Korea, (4) School of Chemical and Biological Engineering, Seoul National University, Seoul National University, Shinlim-dong, Kwanak-ku, Seoul, 151-744, South Korea

GTL(Gas to Liquids), especially natural gas to FT(Fisher-Tropsch) synthetic fuel, process optimization study was performed in order to find optimum parameters for optimum production. The minimum required energy and optimum operating conditions of GTL process are determined through the changes of system variables, such as temperature, H2/CO ratio, etc. During the simulation, the overall synthetic processes are assumed to proceed with steady-state reaction of GTL, and catalyst and the physical properties of reacting medium are governed by Redlich-Kwong-Soave (RKS) equation. The reaction model of GTL process are assumed to be composed of ATR syngas(synthesis gas) reforming unit and FTS(Fisher-Tropsch Synthesis) reactor unit.

The simulation procedures are carried out to determine optimum condition of GTL process while varying syngas composition and operating temperature of the reactor. According to simulation results, optimum operating parameters of GTL process are temperature of 255C and H2/CO ratio of 2. The simulation results will be compared to the actual experimental data from the lab-scale GTL process which is composed of ATR(Auto Thermal Reforming) reaction and FT slurry phase reaction.