STUDY OF THE INFLUENCE OF FUNCTIONAL GROUPS TYPES ON ACTIVATED CARBON ADSORPTION ABILITIES OF ACETONE AND BENZENE APPLYING: CRITICAL REVIEW

• Main Author: P Lumbangaol, Patar
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/67986
• Institution: Institut Teknologi Bandung

Acetone and benzene are volatile organic components (VOCs) which are harmful if inhaled by humans. In the metallurgical industry, acetone is used as a boron capture reagent in the hydrometallurgical process of refining solar grade silicon (SOG-Si) to metallugical grade silicon, while benzene is found in coal tar components and by-products in the coke production process. To reduce the risk of harm, the levels of acetone and benzene need to be lowered to a safe limit. The method used to reduce the levels of acetone and benzene is generall through an adsorption process by absorption agents that have high absorption kinetics, one of which is activated carbon. Activated carbon can be produced from the pyrolysis-activation of solid carbon sources such as coal and biomass. Indonesia has large reserves of coal and biomass at competitive prices, so it has the potential to be used as an activated carbon precursor. To optimize the use of activated carbon as an adsorbent for the two VOCs, it is necessary to understand the factors that affect the performance of activated carbon adsorption. The adsorption ability of activated carbon can be influenced by the functional group components in the pores of the activated carbon, therefore it is necessary to know the effect of each of these functional groups on the affinity of activated carbon absorption in acetone and benzene compounds. In this literature study, the effect of the type of functional group on the adsorption affinity of acetone and benzene was analyzed and compared. This literature study begins with collecting data and information sourced from books, journals, and other publications related to activated carbon, functional groups, acetone and benzene. Then the analysis and discussion of the effect of the presence of functional groups on the variables that affect the affinity of the absorption of acetone and benzene by activated carbon is carried out. The conclusions and suggestions written in this study are expected to be a source of literature in further research or studies. The results of the review show that functional groups that have a different partial charge tendency with acetone, such as carboxyl and amines can increase the absorption affinity of acetone, and vice versa. This effect can be seen from the isosteric heat at the beginning of the absorption process with carboxyl, amine and hydroxyl groups of 65.4 kJ/mol, 55.7 kJ/mol, 41 kJ/mol respectively, while without the presence of functional groups it is 43,1 kJ/mol. Meanwhile, on the absorption of benzene, the presence of functional groups did not have a significant effect. This is caused by the interaction of the accumulation of strong phi-phi bonds on benzene and activated carbon.value isosteric heat at the beginning of the absorption process in the presence of carboxyl, amine and hydroxyl groups was 50.4 kJ/mol, 52.6 kJ/mol, 50.7 kJ/mol, and without the presence of a functional group of 53.1 kJ/mol. The increase in the adsorption affinity of benzene can be done by increasing the micropores on the activated carbon.