KARBONDİOKSİT TUTUCU OLARAK KULLANILAN KARBON NANOTÜPLER İÇİN EN UYGUN MODİFİKASYON TÜRÜNÜN BELİRLENMESİ.

The primary source of carbon dioxide (CO2) emissions, one of the most important causes of climate change, is fossil fuels used in energy production. Adsorption and especially the use of carbon-based adsorbents have proven to be very effective in reducing CO2 emissions after combustion. Different modifications of carbon nanotubes used for this purpose are used to increase the adsorption capacity. However, when deciding on the most suitable modification type, the adsorption capacity alone is not sufficient, besides many technical criteria, costs also become an issue. Therefore, in this study, four different modifications of multi-walled carbon nanotubes such as polyethyleneimine (PEI), tetraethylenepentamine (TEPA), 3-aminopropyltrieoxylane (APTS), and purine-enhanced PEI were discussed and multi-criteria decision making (MCDM) techniques were used to determine the most appropriate modification type. Considered criteria (pretreatment cost, modification material cost, energy requirement, adsorption capacity, total cycle, decrease in adsorption capacity, desorption temperature, and desorption time) were weighted with SMART (Simple Multi-Attribute Rating Technique) and CRITIC (Criteria Importance Through Intercriteria Correlation) methods. The modification alternatives were compared with the weighting results obtained from both methods using the COPRAS (Complex Proportional Assessment) method. As a result of the study, it was determined that the most suitable option among four different carbon nanotube modifications was PEI supplemented with purine. [ABSTRACT FROM AUTHOR]