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UID:0-1579@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20260729T133000

DTEND;TZID=Asia/Jerusalem:20260729T143000

DTSTAMP:20260622T055951Z

URL:https://aerospace.technion.ac.il/events/seminar-nour-aldeen-nasrallah-
 29july2026/

SUMMARY:Mass-transfer dynamics of MOF-801 under forced-flow temperature-swi
 ng cycling
DESCRIPTION:Lecturer:Nour Aldeen Nasrallah\n Faculty:Department of Aerospac
 e Engineering\n Institute:Technion – Israel Institute of Technology\n Lo
 cation:Classroom 240\, 1st floor\, Aerospace Eng. building\n Zoom: https:/
 /technion.zoom.us/j/98372598857\n Abstract: Metal-organic frameworks (MOFs
 ) are nanoporous materials with strong potential for sorption-based atmosp
 heric water harvesting\, owing to their exceptionally high surface areas (
 ~5\,000 m²/g) and easy regeneration at low temperatures (~70 °C). Howeve
 r\, their practical implementation is limited by slow heat and mass transp
 ort\, poor sorbent utilization\, and the difficulty of integrating MOF nan
 opowders into scalable macroscopic thermofluid systems.\nThis work studies
  the mass-transfer dynamics of MOF-801 during forced-flow temperature-swin
 g cycling. A custom apparatus drives conditioned humid air through a MOF-8
 01 powder bed confined between electrically heated meshes. Adsorption proc
 eeds under forced flow\, while desorption is triggered by Joule heating at
  reduced flow rates to rapidly humidify the outlet stream. Time-resolved t
 emperature and absolute-humidity measurements quantify water-vapor uptake 
 and release through a transient mass-balance formulation\, accounting for 
 sensor reliability\, cycle-resolved water-transfer metrics\, and sorption-
 kinetic fitting.\nThe experiments show repeatable periodic cycling over su
 ccessive runs. Desorption occurs on the order of minutes\, whereas adsorpt
 ion requires longer times\, revealing a clear sorption-kinetic asymmetry. 
 Avrami fits show first-order adsorption uptake\, while desorption is a non
 linear process governed by coupled thermal and vapor transport. Under favo
 rable conditions\, the water-vapor exchange corresponds to a harvesting po
 tential exceeding 10 L day⁻¹ kg_MOF⁻¹. During regeneration\, the out
 let stream reaches dew points above ambient temperature\, confirming that 
 the MOF bed can generate condensation-favorable vapor streams. Overall\, t
 his work provides a transport-aware framework for evaluating binder-free M
 OF-801 beds and designing faster\, scalable atmospheric water-harvesting s
 ystems.\n\nThis work is towards an M.Sc. degree under the supervision of A
 ssoc. Prof. Alexandros Terzis\, The Stephen B. Klein Faculty of Aerospace 
 Engineering\, Technion.\n Details: \n 
CATEGORIES:Seminars
LOCATION:Classroom 240\, 1st floor\, Aerospace Eng. building

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