A dual hydrate-based desalination and CO2 capture process: a Raman spectroscopy approach

Zafar, Sadain; Pirim, Claire; Chazallon, Bertrand

Document type :

Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès avec actes

Permalink :

http://hdl.handle.net/20.500.12210/115281

Title :

A dual hydrate-based desalination and CO2 capture process: a Raman spectroscopy approach

Author(s) :

Zafar, Sadain [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Physique Moléculaire aux Interfaces [PMI]
Pirim, Claire []

Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Physique Moléculaire aux Interfaces [PMI]
Chazallon, Bertrand [Orateur]

Physique Moléculaire aux Interfaces [PMI]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]

Conference title :

European Conference on Gas Hydrates 2024

City :

Trieste (Italy)

Country :

Italie

Start date of the conference :

2024-06-10

HAL domain(s) :

Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]

English abstract : [en]

The confluence of global economic and population growths sets the backdrop of simmering tensions over dwindling water resources, global warming, and air pollution. Addressing the increase in CO2 concentration in the ...
Show more >The confluence of global economic and population growths sets the backdrop of simmering tensions over dwindling water resources, global warming, and air pollution. Addressing the increase in CO2 concentration in the atmosphere and, at the same time, water scarcity (SDG 6 and 13 from UN) is ofparamount importance. Recently, it has been proposed that both ongoing challenges can be tackled employing the hydrate technology [1]. The working principle of this single integrated approach at the molecular scale is based on the selective trapping of CO2 molecules (guests) in clathrate hydrate cages and, at the same time, the exclusion of the salt from growing hydrate crystals. A unique in-situ Raman-coupled high-pressure cell is used to investigate the effect of salt (NaCl) concentration (typically of 3.5 wt%) on hydrates formation at different subcooling temperatures between +4°C and −12°C. We show how initial partial or complete CO2 dissolution in the salt solution impact clathrate hydrates crystal morphology and distribution in the reactor [2]. More specifically, a methodology utilizing water-stretching vibrations and corresponding calibration curves was developed to derived water-to-hydrate conversion and maximal water recovery. Furthermore, a monitoring of the rise of the salt concentration in the remaining liquid phase was obtained in-situ to reveal how water is primarily extracted from the saline solution to participate in the formation of the CO2 hydrate lattice structure. These results brought new insights into the molecular understanding of the salting-out effect by clathrate formation, and therefore is of valuable help in the development of the hydrate-baseddesalination process with CO2 capture.[1] M. Sarshar & A. H. Sharafi, Desalination Water Treat., vol. 28, no. 1–3, pp. 59–64, Apr. 2011, doi:10.5004/dwt.2011.2201.[2] S. Zafar PhD thesis 2024, University of LilleShow less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL

Submission date :

2024-06-20T02:23:39Z

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