Silica-Supported Ionic Liquids for Heat-Powered Sorption Desalination

Ahmed Askalany; Christopher Olkis; Emilia Bramanti; Dmitry Lapshin; Luigi Calabrese; Edoardo Proverbio; Angelo Freni; Giulio Santori

doi:10.1021/acsami.9b07602

Silica-Supported Ionic Liquids for Heat-Powered Sorption Desalination

Ahmed Askalany, Christopher Olkis, Emilia Bramanti, Dmitry Lapshin, Luigi Calabrese, Edoardo Proverbio, Angelo Freni, Giulio Santori^*

^*Corresponding author for this work

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

This work investigates the application of novel sorption materials to heat-powered desalination systems. Two ionic liquids 1-ethyl-3-methylimidazolium acetate (Emim-Ac) and 1-ethyl-3-methylimidazolium methanesulfonate (Emim-Oms) were impregnated in two silica supports, namely, Syloid AL-1FP and Syloid 72FP. Emim-Ac and Emim-Oms composite sorbents have been compared on morphology, water vapor sorption equilibrium, and heat of sorption. Fourier-transform infrared spectroscopy shows that the ionic liquid partly self-organizes on the silica surface. When used in a sorption desalination process powered by low grade heat at 60 °C, these composites have exceptionally high theoretical working capacities ranging from 1 to 1.7 g_water g_sorbent^–1. Experimental tests on a lab scale desalinator show that Emim-Ac/Syloid 72FP in real operating conditions can produce 25 kg_water kg_sorbent^–1 day^–1. To date, this yield is 2.5 times higher than the best achieved with silica gel.

Original language	English
Pages (from-to)	36497-36505
Number of pages	9
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	40
DOIs	https://doi.org/10.1021/acsami.9b07602
Publication status	Published - 9 Oct 2019

Keywords

Supported Ionic Liquid
Desalination
Water
Sorption
Ionogel

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10.1021/acsami.9b07602

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title = "Silica-Supported Ionic Liquids for Heat-Powered Sorption Desalination",

abstract = "This work investigates the application of novel sorption materials to heat-powered desalination systems. Two ionic liquids 1-ethyl-3-methylimidazolium acetate (Emim-Ac) and 1-ethyl-3-methylimidazolium methanesulfonate (Emim-Oms) were impregnated in two silica supports, namely, Syloid AL-1FP and Syloid 72FP. Emim-Ac and Emim-Oms composite sorbents have been compared on morphology, water vapor sorption equilibrium, and heat of sorption. Fourier-transform infrared spectroscopy shows that the ionic liquid partly self-organizes on the silica surface. When used in a sorption desalination process powered by low grade heat at 60 °C, these composites have exceptionally high theoretical working capacities ranging from 1 to 1.7 gwater gsorbent–1. Experimental tests on a lab scale desalinator show that Emim-Ac/Syloid 72FP in real operating conditions can produce 25 kgwater kgsorbent–1 day–1. To date, this yield is 2.5 times higher than the best achieved with silica gel.",

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author = "Ahmed Askalany and Christopher Olkis and Emilia Bramanti and Dmitry Lapshin and Luigi Calabrese and Edoardo Proverbio and Angelo Freni and Giulio Santori",

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language = "English",

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T1 - Silica-Supported Ionic Liquids for Heat-Powered Sorption Desalination

AU - Askalany, Ahmed

AU - Olkis, Christopher

AU - Bramanti, Emilia

AU - Lapshin, Dmitry

AU - Calabrese, Luigi

AU - Proverbio, Edoardo

AU - Freni, Angelo

AU - Santori, Giulio

PY - 2019/10/9

Y1 - 2019/10/9

N2 - This work investigates the application of novel sorption materials to heat-powered desalination systems. Two ionic liquids 1-ethyl-3-methylimidazolium acetate (Emim-Ac) and 1-ethyl-3-methylimidazolium methanesulfonate (Emim-Oms) were impregnated in two silica supports, namely, Syloid AL-1FP and Syloid 72FP. Emim-Ac and Emim-Oms composite sorbents have been compared on morphology, water vapor sorption equilibrium, and heat of sorption. Fourier-transform infrared spectroscopy shows that the ionic liquid partly self-organizes on the silica surface. When used in a sorption desalination process powered by low grade heat at 60 °C, these composites have exceptionally high theoretical working capacities ranging from 1 to 1.7 gwater gsorbent–1. Experimental tests on a lab scale desalinator show that Emim-Ac/Syloid 72FP in real operating conditions can produce 25 kgwater kgsorbent–1 day–1. To date, this yield is 2.5 times higher than the best achieved with silica gel.

AB - This work investigates the application of novel sorption materials to heat-powered desalination systems. Two ionic liquids 1-ethyl-3-methylimidazolium acetate (Emim-Ac) and 1-ethyl-3-methylimidazolium methanesulfonate (Emim-Oms) were impregnated in two silica supports, namely, Syloid AL-1FP and Syloid 72FP. Emim-Ac and Emim-Oms composite sorbents have been compared on morphology, water vapor sorption equilibrium, and heat of sorption. Fourier-transform infrared spectroscopy shows that the ionic liquid partly self-organizes on the silica surface. When used in a sorption desalination process powered by low grade heat at 60 °C, these composites have exceptionally high theoretical working capacities ranging from 1 to 1.7 gwater gsorbent–1. Experimental tests on a lab scale desalinator show that Emim-Ac/Syloid 72FP in real operating conditions can produce 25 kgwater kgsorbent–1 day–1. To date, this yield is 2.5 times higher than the best achieved with silica gel.

KW - Supported Ionic Liquid

KW - Desalination

KW - Water

KW - Sorption

KW - Ionogel

UR - http://dx.doi.org/10.1021/acsami.9b07602

U2 - 10.1021/acsami.9b07602

DO - 10.1021/acsami.9b07602

M3 - Article

SN - 1944-8244

VL - 11

SP - 36497

EP - 36505

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 40

ER -

Silica-Supported Ionic Liquids for Heat-Powered Sorption Desalination

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Keywords

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