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Stepwise observation and quantification and mixed matrix membrane separation of CO 2 within a hydroxy-decorated porous host
- Source :
- Chemical Science, Morris, C, Jacques, N, Godfrey, H, Mitra, T, Fritsch, D, Lu, Z, Murray, C A, Potter, J, Cobb, T M, Yuan, F, Tang, C, Yang, S & Schroder, M 2017, ' Stepwise Observation and Quantification and Mixed Matrix Membrane Separation of CO2 within a Hydroxy-Decorated Porous Host ', Chemical Science, vol. 2017, no. 8, pp. 3239-3248 . https://doi.org/10.1039/C6SC04343G
- Publication Year :
- 2017
-
Abstract
- The identification of preferred binding domains within a host structure provides important insights into the function of materials. State-of-the-art reports mostly focus on crystallographic studies of empty and single component guest-loaded host structures to determine the location of guests. However, measurements of material properties (e.g., adsorption and breakthrough of substrates) are usually performed for a wide range of pressure (guest coverage) and/or using multi-component gas mixtures. Here we report the development of a multifunctional gas dosing system for use in X-ray powder diffraction studies on Beamline I11 at Diamond Light Source. This facility is fully automated and enables in situ crystallographic studies of host structures under (i) unlimited target gas loadings and (ii) loading of multi-component gas mixtures. A proof-of-concept study was conducted on a hydroxyl-decorated porous material MFM-300(VIII) under (i) five different CO2 pressures covering the isotherm range and (ii) the loading of equimolar mixtures of CO2/N2. The study has successfully captured the structural dynamics underpinning CO2 uptake as a function of surface coverage. Moreover, MFM-300(VIII) was incorporated in a mixed matrix membrane (MMM) with PIM-1 in order to evaluate the CO2/N2 separation potential of this material. Gas permeation measurements on the MMM show a great improvement over the bare PIM-1 polymer for CO2/N2 separation based on the ideal selectivity.
- Subjects :
- chemistry.chemical_classification
Analytical chemistry
Diamond
02 engineering and technology
General Chemistry
Polymer
Permeation
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Membrane
Adsorption
chemistry
engineering
0210 nano-technology
Porosity
Material properties
Powder diffraction
Subjects
Details
- ISSN :
- 20416520
- Database :
- OpenAIRE
- Journal :
- Chemical Science
- Accession number :
- edsair.doi.dedup.....fa83428ec200899257769f6c0f92950a
- Full Text :
- https://doi.org/10.1039/c6sc04343g