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Samenvatting
In view of the sensitivity of Na-ETS-4 zeotype to temperature, the effect of regeneration temperature on its adsorptive performance was investigated in this work. Adsorption isotherms and uptake kinetics of nitrogen and methane were measured after applying a heat treatment at temperatures of 100, 135, and 165 ◦C along with vacuum as thermal activation. Increasing the initial activation temperature in the 100–165 ◦C range led to an increase in adsorption capacity due to the intra-pore water removal. At 100 kPa, methane uptake increased from 0.2 to 0.35 mol/kg and nitrogen uptake increased from 0.07 to 0.16 mol/kg. By applying successive regenerations at 100 and 135 ◦C, the equilibrium/kinetic adsorption properties did not change. However, by successive regeneration of the adsorbent at 165 ◦C, the equilibrium capacity (for methane from 0.35 to 0.1, for nitrogen from 0.16 to 0.1 mol/kg at 100 kPa) and diffusion time constant parameter (for methane from 0.02 to 7.16 × 10−5 s−1) decreased gradually. Also, structural changes of Na-ETS-4 under successive high-temperature (i.e., 165 ◦C) regeneration were studied by XRD. A gradual reduction of Na-ETS-4 crystallinity was revealed after each regeneration at 165 ◦C. However, Na-ETS-4 showed stable adsorption performance when using only vacuum as regeneration method.
Originele taal-2 | English |
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Pagina's (van-tot) | 450-459 |
Aantal pagina's | 10 |
Tijdschrift | Chemical Engineering Research and Design |
Volume | 199 |
DOI's | |
Status | Published - nov 2023 |
Bibliografische nota
Publisher Copyright:© 2023 Institution of Chemical Engineers
Vingerafdruk
Duik in de onderzoeksthema's van 'The effect of regeneration temperature on the adsorptive properties of Na-ETS-4 zeotype in successive adsorption/desorption cycles'. Samen vormen ze een unieke vingerafdruk.Projecten
- 1 Actief
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SRP70: SRP-Onderzoekszwaartepunt: Duurzame chemische technologie door middel van multifunctionele gestructureerde materialen
Denayer, J., Broeckhoven, K. & Van Assche, T.
1/11/22 → 31/10/27
Project: Fundamenteel