A Simulation Study On SCR(Steam Carbon Dioxide Reforming) Process Optimization for Fischer-Tropsch Synthesis

A simulation study on SCR (steam carbon dioxide reforming) in gas-to-liquid (natural gas to Fischer-Tropsch synthetic fuel) process was carried out in order to find optimum reaction conditions for SCR experiment. Optimum operating conditions for SCR process were determined by changing reaction variables such as temperature and CH4 / steam / CO2 feed ratio. Simulation was carried out by Aspen Plus. During the simulation, overall process was assumed to proceed under steady-state conditions. It was also assumed that physical properties of reaction medium were governed by RKS (Redlich-Kwong-Soave) equation. Optimum simulation variables such as temperature and feed ratio were determined by considering H2/CO ratio for FTS (Fischer-Tropsch synthesis), CH4 conversion and CO2 conversion. Simulation results showed that optimum reaction temperature and CH4 / steam / CO2 feed ratio in SCR process were 850 oC and 1.0 / 1.6 / 0.7, respectively. Under optimum temperature 850 oC, CH4 conversion and CO2 conversion were calculated at 99% and 49% respectively.