Article (Scientific journals)
A safe and compact flow platform for the neutralization of a mustard gas simulant with air and light
Emmanuel, Noémie; Bianchi, Pauline; Legros, Julien et al.
2020In Green Chemistry, 22, p. 4105-4115
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Keywords :
Flow chemistry; Neutralization; Chemical warfare agents
Abstract :
[en] A low footprint, mobile, robust and frugal chemical neutralization technology is reported for the oxidative neutralization of a mustard gas simulant. It relies on the inherent properties of a highly engineered continuous flow setup and carefully optimized and simple, yet robust, experimental conditions. The neutralization protocol uses only non-toxic, widely available and cheap chemicals. The continuous flow setup integrates a singlet oxygen generator and exploits its oxidative power to neutralize 2-chloroethyl ethyl sulfide (CEES), the most common thioether mustard gas simulant. The flow reactor can be connected to either pressurized oxygen or air and handles CEES as a 1 M solution in EtOH containing a trace amount (0.06 mol%) of a non-toxic and widely available photosensitizer (Methylene Blue). Upon irradiation with visible light (orange or white light), total and highly selective neutralization towards the corresponding non-toxic sulfoxide (1-chloro-2-(ethylsulfinyl)ethane, CEESO) is obtained with reactor effluents containing less than 1% of the corresponding potentially toxic sulfone (1-chloro-2-(ethylsulfonyl)ethane, CEESO2). With a low footprint (L x W x H 94 x 42 x 40 cm), this neutralization technology can be embarked on a vehicle for on-site interventions, localized at a neutralization facility or both. The experimental work is also supported with a computational rationalization of the reactivity of CEES towards singlet oxygen.
Disciplines :
Chemistry
Author, co-author :
Emmanuel, Noémie  ;  Université de Liège - ULiège > Département de chimie (sciences) > CITOS
Bianchi, Pauline   ;  Université de Liège - ULiège > Master en sc. chimiques, à fin.
Legros, Julien;  Université de Rouen
Monbaliu, Jean-Christophe  ;  Université de Liège - ULiège > Département de chimie (sciences) > Synthèse organique appliquée
 These authors have contributed equally to this work.
Language :
English
Title :
A safe and compact flow platform for the neutralization of a mustard gas simulant with air and light
Publication date :
2020
Journal title :
Green Chemistry
ISSN :
1463-9262
eISSN :
1463-9270
Publisher :
Royal Society of Chemistry, United Kingdom
Volume :
22
Pages :
4105-4115
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 08 July 2020

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