Improved CO2adsorption onto chemically activated spherical phenol resin

Kutub Uddin, Animesh Pal, Bidyut Baran Saha

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6 Citations (Scopus)


This study reveals the significant improvement of adsorption capacity of carbon dioxide (CO2) onto spherical phenol resin (PR) activated by potassium hydroxide (KOH), designated KOH6-PR. Experiments were performed using a gravimetric adsorption measurement instrument for the wide range of temperatures 20-70 °C and pressure up to 7 MPa. The measured excess uptakes were found steadily increase up to 5.7 MPa at 25 °C and reached the value of 1.69 g g-1. After that, a declining trend was observed, which is corrected by the adsorbed gas density and pore volume of the adsorbent. The measured isotherm data were examined using the modified Dubinin-Astakhov (D-A) model, and the Tóth model within a 3.7 % root mean square deviation (RMSD). The maximum CO2adsorption capacity of microporous KOH6-PR was found 2.36 cm3g-1using the modified d-A model. The adsorption capacity showed more than 50 % enhancement compared to the widely used Maxsorb III. The average value of heat of adsorption is calculated employing the Clausius-Clapeyron and the modified d-A equations. The cooling performance of an adsorption cycle using the KOH6-PR/CO2pair is predicted. These analyses are necessary for utilizing CO2as a refrigerant in adsorption heat pumps and gas storage applications.

Original languageEnglish
Article number101255
JournalJournal of CO2 Utilization
Publication statusPublished - Oct 2020

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Process Chemistry and Technology


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