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Soppresso il 01/10/2020

Torna all'elenco Contributi in rivista anno 2020

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Tipo: Articolo in rivista

Titolo: Immobilization of ?-glucosidase over structured cordierite monoliths washcoated with wrinkled silica nanoparticles

Anno di pubblicazione: 2020

Formato: Elettronico

Autori: Venezia, Virginia; Costantini, Aniello; Landi, Gianluca; Di Benedetto, Almerinda; Sannino, Filomena; Califano, Valeria

Affiliazioni autori: V.Venezia, A.Costantini, A.di Benedetto:Università degli Studi di Napoli Federico II-Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale F.Sannino:Department of Agricultural Sciences, Università degli Studi di Napoli Federico II

Autori CNR:

  • VALERIA CALIFANO
  • GIANLUCA LANDI

Lingua: inglese

Abstract: The enzymatic conversion of biomass-derived compounds represents a key step in the biorefinery flowsheet, allowing low-temperature high-efficiency reactions. ?-Glucosidases are able to hydrolyze cellobiose into glucose. Wrinkled silica nanoparticles (WSNs) were demonstrated to be a good support for the immobilization of ?-glucosidases, showing better performance than free enzymes in batch reaction; on the other hand, immobilized enzyme microreactors (IEMs) are receiving significant attention, because small quantities of reagents can be used, and favorable heat and mass transfer can be achieved with respect to conventional batch systems. In this work, we prepared, characterized, and tested structured enzymatic reactor compounds by a honeycomb monolith, a WSN washcoat, and ?-glucosidases as the active phase. Powder and structured materials were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), N physisorption, thermogravimetric analysis (TGA), and Fourier-transform infrared spectroscopy (FT-IR). Structured catalysts were tested under both batch and continuous flow reaction conditions and compared to powder catalysts (batch reaction). The WSN washcoat was attached well onto the monolith walls, as suggested by the negligible weight loss after ultrasound treatment; the WSNs preserved their shape, porosity, and individual nature when deposited onto the monolith walls. The immobilized enzyme microreactors proved to be very efficient in hydrolysis of cellobiose to glucose, showing a complete conversion under continuous flow reaction at a batch-equivalent contact time equal to 120 min vs. 24 h obtained in the batch experiments. The apparent K value showed a 20-fold decrease with respect to the batch process, due to the absence of external diffusive transport limitations.

Lingua abstract: inglese

Pagine da: 1

Pagine a: 15

Rivista:

Catalysts Molecular Diversity Preservation International
Paese di pubblicazione:
Lingua: inglese
ISSN: 2073-4344

Numero volume: 10

Numero fascicolo: 8

DOI: 10.3390/catal10080889

Referee: Sì: Internazionale

Stato della pubblicazione: Published version

Indicizzato da: Scopus [2-s2.0-85090290722]

Parole chiave:

  • Cordierite monolith
  • Enzyme immobilization
  • Immobilized enzyme microreactors
  • Wrinkled silica
  • ?-glucosidase

URL: http://www.scopus.com/record/display.url?eid=2-s2.0-85090290722&origin=inward

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