Characterization Study of CO2, CH4, and CO2/CH4 Hydroquinone Clathrates Formed by Gas–Solid Reaction
| Autor: | Romuald Coupan, Christophe Dicharry, Joachim Allouche, Eve Péré, Fabrice Guerton, Jean-Marc Sotiropoulos, Joseph Diaz, Frédéric Plantier, Abdel Khoukh, Jean-Philippe Torré, S. Labat, Pascale Sénéchal, Virginie Pellerin, Peter Moonen, Jean-Paul Grenet |
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| Přispěvatelé: | Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Développement de méthodologies expérimentales (DMEX), Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), ISIFoR Carnot Institute, Centre National de la Recherche Scientifique - CNRS (FRANCE), Total (FRANCE), Université de Pau et des Pays de l'Adour - UPPA (FRANCE) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Clathrate hydrate
Analytical chemistry Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences symbols.namesake chemistry.chemical_compound [CHIM.GENI]Chemical Sciences/Chemical engineering Clathrates Metastability Génie chimique [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Physical and Theoretical Chemistry Génie des procédés Hydroquinone Porosimetry Carbon-13 NMR 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy chemistry symbols Gravimetric analysis CO2 0210 nano-technology Mesoporous material Raman spectroscopy |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, 2017, 121 (41), pp.22883-22894. ⟨10.1021/acs.jpcc.7b07378⟩ Journal of Physical Chemistry C, American Chemical Society, 2017, 121 (41), pp.22883-22894. ⟨10.1021/acs.jpcc.7b07378⟩ |
| ISSN: | 1932-7447 1932-7455 |
| DOI: | 10.1021/acs.jpcc.7b07378⟩ |
| Popis: | cited By 0; International audience; Hydroquinone (HQ) is known to form organic clathrates with some gaseous species such as CO2 and CH4. This work presents spectroscopic data, surface and internal morphologies, gas storage capacities, guest release temperatures, and structural transition temperatures for HQ clathrates obtained from pure CO2, pure CH4, and an equimolar CO2/CH4 mixture. All analyses are performed on clathrates formed by direct gas–solid reaction after 1 month’s reaction at ambient temperature conditions and under a pressure of 3.0 MPa. A collection of spectroscopic data (Raman, FT-IR, and 13C NMR) is presented, and the results confirm total conversion of the native HQ (α-HQ) into HQ clathrates (β-HQ) at the end of the reaction. Optical microscopy and SEM analyses reveal morphology changes after the enclathration reaction, such as the presence of surface asperities. Gas porosimetry measurements show that HQ clathrates and native HQ are neither micro- nor mesoporous materials. However, as highlighted by TEM analyses and X-ray tomography, α- and β-HQ contain unsuspected macroscopic voids and channels, which create a macroporosity inside the crystals that decreases due to the enclathration reaction. TGA and in situ Raman spectroscopy give the guest release temperatures as well as the structural transition temperatures from β-HQ to α-HQ. The gas storage capacity of the clathrates is also quantified by means of different types of gravimetric analyses (mass balance and TGA). After having been formed under pressure, the characterized clathrates exhibit exceptional metastability: the gases remain in the clathrate structure at ambient conditions over time scales of more than 1 month. Consequently, HQ gas clathrates display very interesting properties for gas storage and sequestration applications. |
| Databáze: | OpenAIRE |
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