Tri-reforming, as a new approach for the treatment of CO2 in flue stack gases, has been
studied in this work. To determine the optimum operating conditions for the production of
syngas with target ratio and maximum CO2 conversion, the effects of temperature (400
e1200 C), CH4/Flue gas ratio (0.4e1.0) and pressure (1e5 atm), on the compositions of
syngas were investigated. Also, the methanol production from syngas has been rigorously
simulated. An optimum heat exchange network was obtained with the objective of minimizing
both utility and capital costs, which were calculated by General Algebraic Modeling
system (GAMS). Furthermore, an economic analysis was carried out to substantiate the
potential profits based on the conceptual results from heat integration. Results showed
that the tri-reforming process, when integrated with methanol synthesis, is an economical
approach for the treatment and utilization of CO2 in flue gases.