Mil-101: CO2 adsorption at different temperatures

Abstract

Carbon dioxide (CO2) is the major greenhouse gas and for this reason, several countries are seeking for new strategies to reduce emissions of this gas in the atmosphere. Thus, among the technological options for climate change mitigation, carbon capture and storage (CCS) arises as an interesting and promising choice for reducing GEE emissions from large emitters like power plants, oil refineries and cement factories. The organic-inorganic hybrid materials, or "Metal Organic Frameworks" (MOFs), a class of porous materials, are promising materials in the field of CO2 capture since they are able to adsorb large quantities of this gas. MIL-101 is a MOF that has presented itself as a relevant material in CO2 capture due to its adsorptive properties. Thus, the synthesis, characterization and evaluation of CO2 adsorption capacity of the MIL-101 (Cr) are the goals of this work. The synthesis was carried out using a hydrothermal method at 200 °C for eight hours. The formed product was characterized by X-ray powder diffraction, infrared spectrometry and measurement of the surface area. CO2 adsorption isotherms, up to 40 bar, were obtained at four different temperatures: 10 °C, 15 °C, 20 °C and 30 °C.