CO₂/N₂adsorption selectivity using metal-organic framework MIL-101(Cr) for marine engine exhaust model

Shipping, or sea freight, is still the most crucial mode of transportation, facilitating 90% of the International trade. With that high percentage, shipping also contributes in accumulating more than 120 million tons of carbon dioxide in the atmosphere each year (Hydros Foundation, 2015). In order to prevent and overcome any worse impact from the heat-trapping gas, International Maritime Organization (IMO) set new rules that require the shipping industry to reduce their ship's CO2 emission by 40% in the upcoming 2030. To meet this requirement, post-combustion adsorption technology is an interesting option since this method does not force owner to replace their whole ship system but instead just add some additional equipment. Adsorption method required a suitable adsorbent for each specific purpose. In this research the adsorbent is expected to be able to capture CO2 gasses from a ship exhaust, while considering the effect of N2 gasses that mainly dominate the flue gasses. MIL-101 Cr, a type of metal-organic framework, is one potential adsorbent for the required function. This material has a large surface area, along with a great chemical and thermal stability. In this research writer conducted a hydrothermal synthesize of MIL-101 Cr, followed by material characterization: surface area analysis using N2 adsorption/desorption, Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). After the synthesize and characterization, adsorption measurement is conducted using volumetric method and then the selectivity is calculated using ideal adsorbed solution theory (IAST) method. In this research the CO2/N2 selectivity using MIL-101 Cr reached up to 30,1 in 27°C and 9,9 in 25°C.