CO2 adsorption behavior of microwave synthesized zeolite beta

• Zeolite beta was rapid synthesized in 4 h by microwave.
• Microwave synthesized zeolite beta show higher CO2 adsorption capacity and selectivity on CO2 than their hydrothermal counterpart.
• Increased CO2 adsorption was resulted from higher aluminum content.
• The enhanced selectivity on CO2 was due to less hydrophilicity.

Zeolite beta was successfully synthesized by direct synthesis with addition of seeds under microwave irradiation. CO2 adsorption properties on the microwave synthesized zeolite beta were investigated at constant temperature 40 °C and absolute pressure 1 atm which compared with zeolite beta synthesized by the conventional hydrothermal method. Microwave synthesized zeolite beta showed higher CO2 adsorption capacity than that of hydrothermal synthesized zeolite beta. Even the surface area of microwave synthesized zeolite beta (463 m2/g) was similar with hydrothermal synthesized one (482 m2/g), higher aluminum contents and the less hydrophilicity of microwave synthesized zeolite beta contributed to the higher adsorption capacity and selectivity of CO2 than those of hydrothermal synthesized one, respectively.

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