Abstract: One of difficulties for developing new energy system is how to control CO2 emission and to raise the utility effect of energy source at the same time. Taking the chemical production and power polygeneration system as a breakthrough point, taking the concept of integrating clear energy production with CO2 separation as the guiding ideology, the key factors influencing the energy consumption for CO2 separation were defined. From the thermodynamics theory foundation of CO2 separation, the methanol-power polygeneration system was introduced and analyzed, and it was pointed out finally that the polygeneration system is of high-efficiency and energy-saving, and it is also has the potential of greenhouse gas control.

Key words: CO2 recovery, polygeneration system, integrated gasification combined cycle