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Breakthrough in Carbon Dioxide Adsorption: Research at Suranaree University of Technology Reveals Effective Methods for CO2 Capture

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— 1 min read

Researchers at Suranaree University of Technology in Thailand have made significant progress in studying carbon dioxide (CO2) adsorption at high pressures using alkali-impregnated activated carbons. The study, funded by the National Research Council of Thailand and the Royal Golden Jubilee Ph.D. scholarship, aimed to investigate the effects of sodium hydroxide (NaOH) impregnation on CO2 adsorption capacity. The results show that the maximum adsorption capacity is achieved with the activated carbon prepared by the activation combined with oxidation method under specific conditions.

Key Takeaways:

  • The study found that the activated carbon prepared by the activation combined with oxidation method showed the highest CO2 adsorption capacity among the four types of activated carbons used.
  • The optimal conditions for CO2 adsorption were found to be 180 min of total activation time, two cycles of carbon oxidation, and 1 weight% NaOH impregnation.
  • The Grand Canonical Monte Carlo (GCMC) simulation revealed that the adsorption mechanism of CO2 in the finite-length slit pore model involves an early onset in the adsorption isotherms in the heterogeneous pores.
  • The allocation of NaOH on carbon surfaces affects the adsorption behavior, and the adsorption isotherm for the fixed and random topologies with 1% weight NaOH can enhance the adsorption of CO2 in the larger pore at high pressures.
  • The research concluded that the fixed topology showed the domination adsorption isotherm than the homogeneous and the random topology pores in the case of smaller pore at high pressures.

Statistics:

  • The maximum CO2 adsorption capacity was achieved at 0 degrees C up to the saturation pressure.
  • The optimal conditions for CO2 adsorption included 180 min of total activation time.
  • The four types of activated carbons used in the study showed significant differences in CO2 adsorption capacity.
  • The Grand Canonical Monte Carlo (GCMC) simulation revealed that the adsorption mechanism of CO2 in the finite-length slit pore model involves an early onset in the adsorption isotherms in the heterogeneous pores.

Sources:

  • NewsRx. Studies Conducted at Suranaree University of Technology on Chemicals and Chemistry Recently Reported (Carbon Dioxide Capture In Naoh Impregnated Activated Carbon: Simulation and Experimental Studies). News of Science. June 22, 2025; p 3859.
  • Carbon Dioxide Capture In Naoh Impregnated Activated Carbon: Simulation and Experimental Studies. Adsorption, 2025;31(5).
  • Adsorption can be contacted at: Springer, One New York Plaza, Suite 4600, New York, Ny, United States. (Springer - www.springer.com; Adsorption - www.springerlink.com/content/0929-5607/)

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