Intensification of falling film melt crystallization process through micro and milli-structured surfaces

Abstract : This paper shows how Tailing film melt crystallization process can be intensified by using micro/milli-structured surfaces. This work takes part in the development of purification techniques of bio-acrylic acid. The current acrylic acid synthesis is based on propylene, a petroleum derivative. Thus, a new production route of a bio-acrylic acid is developed, based on glycerol, a green by-product of oleochemistry and biofuel industry. However, the impurity profile of this bio-AA differs from that of propylene-based: crude bio-AA contains much more propionic acid (PA). Classical purification techniques do not allow the separation of these two chemicals whose structures are similar. [1] showed that falling film melt crystallization halves propionic acid contents in purified AA with yields reaching 60% and purification time less than five hours. Increasing the exchange surface between the cold surface and the melt to purify can improve heat transfer, decrease purification time and intensify melt crystallization process. Thus, micro/milli-struttured crystallization surfaces have been designed and tested. Results show that these innovative surfaces can increase productivity by 84%. Heat transfer has been modeled during the crystallization process, and it clearly appears that thermal gradient is divided by ten with milli-structured surface compared to smooth surface.
Type de document :
Article dans une revue
Chemical Engineering and Processing: Process Intensification, Elsevier, 2015, 90, pp.16-23. 〈10.1016/j.cep.2015.02.006〉
Domaine :
Liste complète des métadonnées

https://hal.univ-lorraine.fr/hal-01267212
Contributeur : Lrgp Ul <>
Soumis le : jeudi 4 février 2016 - 10:10:41
Dernière modification le : jeudi 11 janvier 2018 - 06:25:27

Identifiants

Collections

Citation

Marie Le Page Mostefa, Hervé Muhr, Anthony Biget, Edouard Palasari, Michel Fauconet. Intensification of falling film melt crystallization process through micro and milli-structured surfaces. Chemical Engineering and Processing: Process Intensification, Elsevier, 2015, 90, pp.16-23. 〈10.1016/j.cep.2015.02.006〉. 〈hal-01267212〉

Partager

Métriques

Consultations de la notice

56