Lactic Acid Conversion to Acrylic Acid Over Fluoride-Substituted Hydroxyapatites

Wojcieszak, Robert; Bonnotte, Thomas; PAUL, Sébastien; Katryniok, Benjamin; Dumeignil, Franck

Document type :

Article dans une revue scientifique: Article original

DOI :

10.3389/fchem.2020.00421

Permalink :

http://hdl.handle.net/20.500.12210/33774

Title :

Lactic Acid Conversion to Acrylic Acid Over Fluoride-Substituted Hydroxyapatites

Author(s) :

Wojcieszak, Robert [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Bonnotte, Thomas [Auteur]
PAUL, Sébastien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Katryniok, Benjamin [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Dumeignil, Franck [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Journal title :

Frontiers in Chemistry

Abbreviated title :

Front. Chem.

Volume number :

Pages :

1 - 11

Publisher :

Frontiers Media SA

Publication date :

2020-05-13

ISSN :

2296-2646

HAL domain(s) :

Chimie/Catalyse

English abstract : [en]

One of the most interesting intermediates for the chemical industry is acrylic acid, which can be derived from lactic acid by catalytic dehydration in the gas phase. The realization of this reaction is complex due to a ...
Show more >One of the most interesting intermediates for the chemical industry is acrylic acid, which can be derived from lactic acid by catalytic dehydration in the gas phase. The realization of this reaction is complex due to a strong thermal activation leading to the formation of undesired by-products (acetaldehyde, propanoic acid…) as well as polymerization. We studied this reaction over hydroxyapatites modified by substitution of the hydroxyl groups by fluoride. This notably enabled increasing the selectivity to acrylic acid while reducing the formation of the undesired acetaldehyde. Introduction of fluoride induced a modification of the phosphate (PO3−4 ) groups. In the presence of water, fluoride prevented the formation of hydrogenophosphate species (HPO2−4 ), which are well-known acid sites responsible for the formation of acetaldehyde by decarboxylation/decarbonylation. Further, we evidenced an important impact of fluoride substitution on crystallinity, specific surface area and on the surface Ca/P ratio. This latter is known to be a key parameter to control the acidity and the basicity of the hydroxyapatites. Using FT-IR spectroscopy with propyne as a probe molecule, we could show that lactic acid was concertedly adsorbed on basic and acid sites, which might be at the origin of the observed superior performances.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

ANR Project :

Synthèse d'acide acrylique à partir du glycérol via l'acide lactique

Administrative institution(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Valorisation des alcanes et de la biomasse (VAALBIO)

Submission date :

2020-11-25T13:01:23Z
2020-11-25T17:20:13Z
2020-11-25T17:22:41Z

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Except where otherwise noted, this item's license is described as Attribution 3.0 United States

Version	Link	Modification date
3	20.500.12210/33774*	2020-11-25T17:22:16Z
2	20.500.12210/33774.2	2020-11-25T17:16:02Z
1	20.500.12210/33774.1	2020-11-25T13:01:23Z

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Lactic Acid Conversion to Acrylic Acid ...

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