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Lipase-catalyzed synthesis of butyl butyrate by alcoholysis in an integrated li...
Paiva, Ana L.; Rossum, Diman van; Malcata, F. XavierThis paper reports experimental work pertaining to alcoholysis between butanol and ethyl butanoate, catalyzed by an immobilized lipase in a liquid-vapor system where chemical reaction and physical separation are simultaneously carried out. The processing setup was tested for various compositions of the starting feedstock and operated under reduced pressure. Samples were withdrawn both from the boiler and the co...
Kinetics of lipase-mediated synthesis of butyl butyrate in n-hexane
Paiva, Ana. L.; Rossum, Diman Van; Malcata, F. XavierThis paper reports experimental and modeling work concerning alcoholysis reactions between butanol and ethyl butanoate, catalyzed by Lipozymee in n-hexane, using a batch stirred system at 608C. Description of the reaction kinetics was based on a postulated multisubstrate Ping Pong Bi Bi mechanism, and appropriate rate expressions were derived for all components in the reaction medium. Simplified models were fit...
Integrated vs. sequential reaction and separation: contributions for a global a...
Paiva, Ana L.; Rossum, Diman van; Malcata, F. XavierIntegration of reaction and separation in one single step has often been claimed to provide enhanced processing and economic results when compared with the traditional configuration where a reaction unit is followed by a downstream separation unit, due to alleviation of kinetic and thermodynamic constraints. This paper quantitatively addresses the kinetic and thermodynamic improvements which can be brought abou...
Cascading reactor-separator sets reduces total processing time for low yield Mi...
Paiva, Ana L.; Rossum, Diman Van; Malcata, F. XavierIntegration of reaction with separation has often been claimed to provide enhanced processing due to alleviation of processing constraints which, like equilibrium limitation or product inhibition, are common in enzyme-catalyzed reactions. In this paper, a mathematical model is developed to assess the effect of cascading sets of enzyme reactors and physical separators (which, when the number of sets tends to inf...
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