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Hierarchically MOx@Nb-zeolites for the selective oxidation of HMF to HMFCA.

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Title: Hierarchically MOx@Nb-zeolites for the selective oxidation of HMF to HMFCA.
Authors: El Fergani, Magdi1 (AUTHOR), Candu, Natalia1 (AUTHOR), Granger, Pascal2 (AUTHOR), Coman, Simona M.1 (AUTHOR), Parvulescu, Vasile I.1 (AUTHOR) vasile.parvulescu@chimie.unibuc.ro
Source: Catalysis Today. Dec2022, Vol. 405, p267-276. 10p.
Subjects: Liquid nitrogen, Carbon dioxide, Zeolites, Oxidation
Abstract: The oxidation of 5-hydroxymethylfurfural (HMF) to 5-hydroxymethyl-2-furancarboxylic acid (HMFCA) has been investigated on MO x @Nb-zeolite catalytic systems (where MO x = CoO x , MnO x or FeO x and zeolite - USY and Beta) with hierarchical texture and acid-base properties. These catalysts were exhaustively characterized by several techniques such as XRD, adsorption-desorption of liquid nitrogen at 77 K, CO 2 - and NH 3 -TPD, DRIFT, XPS, and SS NMR. The new hierarchically catalysts produced HMFCA with a selectivity of 97.0% for a X HMF = 95.0% (Mn@Nb-Y30). A synergetic effect between MO x and Nb species in the activation of t -BuOOH and oxidation of HMF has been identified. The absence of FDCA in the reaction products using MOx@Nb-zeolite catalysts can be due to the preponderant presence of the acidic sites (associated to both framework and extra framework AlO x) which prevent a further oxidation of HMFCA to FDCA. [Display omitted] • Multifunctional hierarchically zeolites with non-precious metals. • Selective oxidation of HMF to HMFCA intermediate • The new combination of oxides avoids the use of homogeneous bases • Selective oxidation control through the AlO x framework [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The oxidation of 5-hydroxymethylfurfural (HMF) to 5-hydroxymethyl-2-furancarboxylic acid (HMFCA) has been investigated on MO x @Nb-zeolite catalytic systems (where MO x = CoO x , MnO x or FeO x and zeolite - USY and Beta) with hierarchical texture and acid-base properties. These catalysts were exhaustively characterized by several techniques such as XRD, adsorption-desorption of liquid nitrogen at 77 K, CO 2 - and NH 3 -TPD, DRIFT, XPS, and SS NMR. The new hierarchically catalysts produced HMFCA with a selectivity of 97.0% for a X HMF = 95.0% (Mn@Nb-Y30). A synergetic effect between MO x and Nb species in the activation of t -BuOOH and oxidation of HMF has been identified. The absence of FDCA in the reaction products using MOx@Nb-zeolite catalysts can be due to the preponderant presence of the acidic sites (associated to both framework and extra framework AlO x) which prevent a further oxidation of HMFCA to FDCA. [Display omitted] • Multifunctional hierarchically zeolites with non-precious metals. • Selective oxidation of HMF to HMFCA intermediate • The new combination of oxides avoids the use of homogeneous bases • Selective oxidation control through the AlO x framework [ABSTRACT FROM AUTHOR]
ISSN:09205861
DOI:10.1016/j.cattod.2022.04.033