Continuous production of cyclodextrins in an ultrafiltration membrane reactor, catalyzed by cyclodextrin glycosyltransferase fromBacillus circulansDF 9R

2015 ◽  
Vol 31 (3) ◽  
pp. 695-699 ◽  
Author(s):  
Jorgelina A. Rodríguez Gastón ◽  
Hernán Costa ◽  
Susana A. Ferrarotti
Keyword(s):  
Membrane Reactor ◽  
Continuous Production ◽  
Ultrafiltration Membrane ◽  
Cyclodextrin Glycosyltransferase

Numerical Modeling of CO2 Splitting in High-Temperature Solar-Driven Oxygen Permeation Membrane Reactors

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Heng Pan ◽  
Youjun Lu ◽  
Liya Zhu
Keyword(s):  
Membrane Reactor ◽  
Continuous Production ◽  
Oxygen Permeation ◽  
Conversion Ratio ◽  
Inert Gas ◽  
Limiting Factors ◽  
Co2 Conversion ◽  
Permeable Membrane ◽  
Concentrated Solar Energy ◽  
Oxygen Permeation Membrane

Abstract H2/CO production via H2O/CO2 splitting powered by concentrated solar energy is a promising pathway for energy conversion/storage. Oxygen permeable membrane reactor serves as an alternative reactor concept for realizing this chemical path with the advantages of continuous production, easy integration, and high product selectivity. In this paper, a mathematical model of steady-state mass and heat transfer coupled with reaction kinetics in the oxygen permeation membrane reactor was established. CO2 splitting in the ceria membrane reactor was simulated and the effects of various factors, including inert/CO2 flow configurations, reaction conditions, and geometric parameters of the membrane, on the CO2 conversion process, were studied. The increase of operating temperature could effectively improve the CO2 conversion ratio, and the effect of decreasing the oxygen pressure of the inert gas is very limited. The oxygen accumulation in the inert gas could lead to considerably high inert demand. Furthermore, conversion-limiting factors were studied under different conditions and there are two critical rate constants of reactions signifying a transition from a chemical kinetics limited conversion to oxygen diffusion limited conversion. This work helps guide reactor design and operate toward achieving the maximum CO2 conversion ratio.

scholarly journals Continuous production of β-cyclodextrin from starch by highly stable cyclodextrin glycosyltransferase immobilized on chitosan

2013 ◽  
Vol 98 (2) ◽  
pp. 1311-1316 ◽  
Author(s):  
Jéssie da Natividade Schöffer ◽  
Manuela Poletto Klein ◽  
Rafael C. Rodrigues ◽  
Plinho Francisco Hertz
Keyword(s):  
Continuous Production ◽  
Cyclodextrin Glycosyltransferase

Purified penicillin acylase performance in a stabilized ultrafiltration membrane reactor

1983 ◽  
Vol 18 (6) ◽  
pp. 333-338 ◽  
Author(s):  
Guido Greco ◽  
Francesco Veronese ◽  
Roberta Largajolli ◽  
Liliana Gianfreda
Keyword(s):  
Membrane Reactor ◽  
Penicillin Acylase ◽  
Ultrafiltration Membrane
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