Synthesis and Characterization of an Amino Functionalized MIL-101(Al) - Separation and Catalytic Properties

by P. Serra-Crespo, E. V. Ramos-Fernandez, J. Gascon, F. Kapteijn
Year: 2011 ISSN: DOI: 10.1021/cm103644b

Bibliography

P. Serra-Crespo, E. V. Ramos-Fernandez, J. Gascon, F. Kapteijn, Chemistry of Materials 23 (2011), p 2565–2572, Synthesis and Characterization of an Amino Functionalized MIL-101(Al) - Separation and Catalytic Properties

Abstract

​A new MIL-101 material based on aluminum and containing amine functional groups has been synthesized. The pure phase NH2-MIL-101(Al) can only be formed in very specific synthesis conditions, where both the metal source and the solvent used play a key role. The resulting porous solid shows a high thermal and chemical stability, decomposing at temperatures above 650 K in air. The NH2-MIL-101(Al) framework offers an excellent trade off for separation of CO2: the combination of high stability, acceptable capacity at low adsorbate partial pressures, high selectivity, and fast regenerability makes this new material a very attractive candidate for applications like natural gas or biogas upgrading. CO2 capacities up to 62 wt % are obtained at room temperature and 3 MPa. In addition to an excellent separation performance, the NH2-MIL-101(Al) shows a high activity in the basic catalyzed Knoevenagel condensation of benzaldehyde with ethyl cyanoacetate at 313 K even in an as apolar a solvent as toluene (turn over frequency, TOF = 1.8 h–1).

Keywords

Amine Catalysis CO2 separation Knoevenagel condensation Metal Organic Framework MIL-101(Al)