SINTESIS DAN KARAKTERISASI METAL ORGANIC FRAMEWORK (MOFs) DENGAN KARBON AKTIF DARI LIMBAH RANTING TEH SEBAGAI ADSORBEN UNTUK ADSORPSI GAS CO2

Abstract

The impact of global warming due to the effect of greenhouse gases resulting from industrial processes and various human activities continues to increase significantly. The exhaust gas from industrial combustion contains carbon dioxide, which is directly discharged into the atmosphere. This condition causes the concentration of carbon dioxide in the atmosphere to be higher, as evidenced by the fact that 90% of the total greenhouse effect gases are produced from CO2 emissions. The aim of this research is to develop a new composite-based material using a combination of MOF and activated carbon derived from biomass waste. Currently, Cu-MOF/Activated Carbon and Ni-MOF/Activated Carbon composite materials have not been widely studied. The activated carbon used in this study was produced from unused tea twig biomass. The high composition of cellulose in the tea twig biomass results in a high carbon content, reaching 43.47%. Activated carbon is synthesized through a process of carbonization and physical activation in one step using a sintering method that utilizes plasma exposure with the help of an Arc Sintering Plasma (APS) tool. Cu-MOFs and Ni-MOFs were synthesized using terephthalic acid as a ligand. In this study, activated carbon was combined with Cu-MOFs and Ni-MOFs through a simple mixture process. From the test results, activated carbon that has been activated by Arc Sintering Plasma (APS) has a surface area, pore size and CO2 gas adsorption capacity of 54.88 m2/g, 9.83 nm and 0.3537 mmol CO2 gas/gram sample, respectively . Then, the best results were obtained on activated carbon samples with an activation temperature of 700 oC which had been combined with MOFs (Cu-MOF/Activated Carbon) for surface area, pore size and CO2 gas adsorption respectively of 26.79 m2/g, 27.69 nm and 2.5767 mmol CO2/gram sample. These data prove that combining MOFs with activated carbon can increase the pore size and absorption capacity of the sample.