Abstract The development of low-cost and sustainable adsorbents is crucial for reducing CO 2 emissions associated with climate change. In this context, waste-derived porous carbons have emerged as promising materials for adsorption applications. This work evaluates the CO 2 adsorption performance of porous carbons derived from printed paper waste using temperature swing adsorption (TSA). The activated carbons were produced by pretreating printed paper waste, followed by impregnation with KOH, K 2 CO 3 , or KHC 8 H 4 O 4 and chemical activation via pyrolysis at 800 °C. Adsorption tests were conducted using TSA, assessing adsorption capacity as a function of temperature. The results showed that the maximum CO 2 adsorption capacity at 30 °C for AC-KOH, AC-KCO, and AC-KHP was 7.64%, 6.28%, and 6.80%, respectively. In adsorption tests at 30 °C at 1 bar, AC-KOH (83.33% micropore volume) demonstrated the best performance with a maximum CO 2 adsorption efficiency of 7.64% (2.29 mmol g −1 ). The average fluctuation after 10 adsorption–desorption cycles was less than 1%, indicating good regeneration and stability of AC-KOH. These results suggest that printed paper is a promising precursor for producing adsorbents for CO 2 adsorption.
Sánchez-Hechavarría et al. (Mon,) studied this question.