New Journal at De Gruyter!
Ed. by de Lasa, Hugo / Xu, Charles
1 Issue per year
Increased IMPACT FACTOR 2011: 0.790
Volume 11 (2013)
Volume 10 (2012)
Volume 9 (2011)
Volume 8 (2010)
Volume 7 (2009)
Volume 6 (2008)
Volume 5 (2007)
Volume 4 (2006)
Volume 3 (2005)
Volume 2 (2004)
Volume 1 (2002)
Most Downloaded Articles
- Micro- and Macromechanics of Hopper Discharge of Ultrafine Cohesive Powder by Tomas, Jürgen and Kache, Guido
- Effect of Chitosan Addition on NiMo/Al2O3 Catalysts for Dibenzothiophene Hydrodesulfurization by Ríos-Caloch, Guillermina/ Santes, Víctor/ Escobar, José/ Valle-Orta, Maiby/ Barrera, María C. and Hernández-Barrera, Melissa
- Fischer Tropsch Synthesis: The Promoter Effects, Operating Conditions, and Reactor Synthesis by Sarkari, Majid/ Fazlollahi, Farhad and Atashi, Hossein
- A Trickle Fixed-Bed Recycle Reactor Model for the Fischer-Tropsch Synthesis by Brunner, Kyle M./ Duncan, Joshua C./ Harrison, Luke D./ Pratt, Kyle E./ Peguin, Robson P. S./ Bartholomew, Calvin H. and Hecker, William C.
- A Comprehensive Review of Just Suspended Speed in Liquid-Solid and Gas-Liquid-Solid Stirred Tank Reactors by Jafari, Rouzbeh/ Chaouki, Jamal and Tanguy, Philippe A.
Hydrolysis of Lactose in a Fluidized Bed of Zeolite Pellets Supporting Adsorbed ß - Galactosidase
1University of Salerno, firstname.lastname@example.org
2University of Salerno, email@example.com
3University of Salerno, firstname.lastname@example.org
4University of Salerno, email@example.com
Citation Information: International Journal of Chemical Reactor Engineering. Volume 3, Issue 1, Pages –, ISSN (Online) 1542-6580, DOI: 10.2202/1542-6580.1275, October 2005
- Published Online:
The purpose of this work is to verify the possibility of using a simple physical adsorption technique to improve enzyme efficiency in performing lactose hydrolysis. Immobilization experiments of ß -galactosidase on zeolite pellets showed that this process is fairly slow and can be accomplished with contact times shorter than few hours. Comparison between homogeneous and heterogeneous hydrolysis experiments in mixed batch reactors indicates that the enzyme distribution within the zeolite pellets is concentrated in a thin shell under the pellet surface. Continuous conversion experiments were carried out on a purposely-built fluidization column. Results were fitted with a mathematical model for fluidized bed conversion without the use of any further adjustable parameter than those used in the heterogeneous batch conversion. Furthermore, no change of the parameter values was necessary. Scale-up predictions given by the model showed that fluidized columns few meters high of pellets supporting b-galactosidase are sufficient for an industrially suitable process of lactose hydrolysis. which can be performed on columns of few meters and, therefore, these are applicable to relatively small process scales as those found in traditional Italian cheese making factories.