Transition Metal Based Metal Organic Frameworks for Carbon Dioxide Capture Studies

Abstract

The major challenges that the world is facing now a days is the increase in greenhouse gasses which causes the global warming. The CO2 gas is one of the greenhouse gasses, it is one of the major candidates that is taking part in greenhouse effect. Due to the increase in CO2 gas the greenhouse effect is also increase and the global warming is also increase. Continuous increase in CO2 emission, there is a need to minimize the emission of the CO2 gas. Many types of absorbents and adsorption techniques are used to capture the CO2 gas. The basic aim of this work is to provide detail overview for the novel class of adsorbents ZIF8 and ZIF67 with Manganese loaded ZIF8 and ZIF67 that is used to capture the CO2. The ZIF shows the higher uptake of the CO2 due to its unique structure and high surface area. An assortment of analysis techniques, including XRD, FTIR, and SEM, are employed to characterize the samples and examine their structural and morphological properties. The adsorption and desorption activities of CO2 on and around the ZIFs were investigated utilizing a high pressure sorption analyzer. At a temperature of 45°C and a pressure of 0-15 bar, the adsorption and desorption of these samples were investigated. The integration of this transition metal base ZIF results in favorable adsorption and desorption characteristics. Adsorption/desorption analysis shows the satisfactory results for their CO2 adsorption capacity. Manganese loaded ZIFs shows high capacity to adsorb carbon dioxide (CO2). Manganese loaded ZIF8 and Manganese loaded ZIF67 was studied at 45o C temperature and 0-15 bar pressure, on these condition it adsorb 5.70 mmol/g and 8.34 mmol/g CO2 respectively. Manganese loaded ZIFs shows very low CO2 uptake loss for 10 cycles. Manganese loaded ZIF8 shows 9% and Manganese loaded ZIF67 7% uptake loss for 10 cycles. At this condition they have more adsorption capacity by increasing the pressure.