Mixed matrix membranes Synthesis with MIL-101 (Cr) for gas separation

Mixed matrix membranes can be composed of a metal organic framework (MOF) and a polymer matrix, taking advantage of the good properties of MOFs and the low cost and permeability of polymer membranes They are promising materials for gas separation due to their selectivity and reasonable cost. MMs have several applications and be designed for purification of natural gas or even in C02-rich pre salt reservoirs. In this work, MM Ms were synthesized with MIL-101 (Cr) (MM 101) that presents high adsorption capacity. The synthesis of MIL-101(Cr) was done employing hydrothermal method according to Ferey1. The characterization of MIL-101(Cr) was done by XRD, FTIR, BET and thermal analysis. MMMs were synthesized using different MIL-101/polymer ratios. MM101s were characterized by thermogravimetric analyses, BET, FTIR and Scanning Electron Microscopy (SEM). The diffractogram of MIL-101(Cr) presented peaks at 8.5° and 9° similarly to the literature, showing good cristanility (Fig. 1 ). FTIR of MIL-101 (Cr) presented bands in the region of 3500 and 3100 cm-1, indicating the presence of water and solvents in the pores. Symmetric and asymmetric bands of coordinated carboxylate groups were observed in the region of 1550 and 1400 cm-1 , corroborating the presence of bridge carboxylates in MIL-101 (Cr). MM101 presented a good MIL-101 dispersion and homogeneity according to SEM analyses (Fig. 2). It can be concluded that MM101 has been satisfactorily obtained. MM101 is being tested towards C02 permeability and selectivity in relation to other gases such as Nz and CH4.