Pervaporation membrane reactors (PVMRs) for esterification

Genduso, Giuseppe; Luis, Patricia; Bruggen, Bart Van der

doi:10.1016/b978-1-78242-223-5.00019-4

Cited by 10 publications

(7 citation statements)

References 125 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pervaporation membrane reactor (PVMR) in which one or more components from a reaction medium is selectively removed is ideal to enhance esterification reaction yield by composite membrane without significant changes in the separation factor (>200). Due to their selective water permeation, these composite membranes effectively drive the equilibrium to the forward direction and improve the esterification yield [171]. The result suggests that the composite catalytic membrane reactor provided almost 72 % conversion by molar ratio 3:1 ethanol to acetic acid and at reaction time 1.5 h and temperature 50 o C. El-Zanati et al [173] provided an alternative CMR for esterification reaction by using flow through catalytic membrane reactor.…”

Section: Dehydrogenation and Esterification Reactionmentioning

confidence: 99%

Polymer nanocomposite membranes and their application for flow catalysis and photocatalytic degradation of organic pollutants

Rajlaxmi

Gupta

Behere

et al. 2021

Materials Today Chemistry

View full text Add to dashboard Cite

Section: Dehydrogenation and Esterification Reactionmentioning

confidence: 99%

Polymer nanocomposite membranes and their application for flow catalysis and photocatalytic degradation of organic pollutants

Rajlaxmi

Gupta

Behere

et al. 2021

Materials Today Chemistry

View full text Add to dashboard Cite

“…Typically, two columns are built in parallel to allow the regeneration of one column while the other is in operational mode. Apparently, the required size of the packed columns is disadvantageous for this technology [4].…”

Section: Empirical Model For Pervaporationmentioning

confidence: 99%

“…Lipase catalysis has the edge over conventional catalysis in several cases where sensitive substrates are used [1]. As chemical equilibria are involved in both lipase and conventional catalysis, the completion of (trans)esterification requires an excess of a reagent and/or the continuous removal of byproducts (e.g., by using reactive distillation [2], molecular sieves [1], bubble reactors [3] or pervaporation [4]). A suitable technology for the removal of these byproducts depends on the physicochemical properties of substrates and products.…”

Section: Introductionmentioning

confidence: 99%

Rational Design Method Based on Techno-Economic Principles for Integration of Organic/Organic Pervaporation with Lipase Catalyzed Transesterification

et al. 2021

View full text Add to dashboard Cite

An engineering foundation is developed in this manuscript to allow the rational design of enzymatic transesterifications integrated with organic–organic pervaporation for the removal of methanol. In the first part, enzyme kinetics are elucidated for the solventless transesterification of two monoterpene alcohols with methyl acetate catalyzed by Novozym 435. Nonlinear regression revealed that three parameters (enzyme loading, forward and backward second-order reaction rate) sufficed to describe the entire conversion as a function of time. In the second part, a mathematical model for acetate ester production, integrated with organic–organic pervaporation, was developed based on a set of ordinary differential equations. To this end, empirical formulae for the pervaporation performance (of a PERVAP 2255-30 membrane and a standard HybSi® membrane) were established, relating methyl acetate and methanol flux to the methanol concentration in the reactor. The resulting digital twin, “PervApp”, allows us to study the influence of the key design parameters “enzyme loading” and “membrane surface” on, e.g., catalyst productivity. Finally, a techno-economic assessment is made for an annual production of 100 tons of geranyl acetate. The described methodology allows producers to shift from laborious, expensive and often disappointing trial-and-error approaches to the rational design of such integrated units.

show abstract

“…From both reasons, water should be removed during esterification reactions. Water can be removed by using 3 conventional methods: adsorption by molecular sieve ( 27,28) , distillation ( 17) and pervaporation (17,29). Nevertheless, molecular sieve such as silica gel might not be convenience to be used in continuous process because it must be regenerated by removing water after pores are entirely filled with water.…”

Section: Pervaporation Applicationmentioning

confidence: 99%

“…Distillation is also not a suitable method to couple enzymatic esterification reaction. Since the esterification medium (reagents and products) is a non-ideal mixture so that it might not fit for vapor equilibriumbased technology (17). In addition, the enzymatic esterification should be operated at mild condition, thus it is not suitable to be coupled with a distillation unit which has to be operated at high temperature.…”

Section: Pervaporation Applicationmentioning

confidence: 99%

Pervaporation-assisted enzymatic esterification of oleic acid and ethanol

Sumranwong

View full text Add to dashboard Cite

The batch and continuous processes of enzymatic esterification of oleic acid and ethanol coupled pervaporation (PV) unit were successfully developed in this study. Bacterial cellulose (BC) impacted with alginate film was used as selectively-permeable membrane to remove water from the reaction mixture. The effects of PV operating modes, amount of enzyme (Novozym 435) loading, flow pattern in the reactor were investigated. The enzymatic esterification of oleic acid and ethanol were carried out under the operating conditions as follows: molar ratio of oleic acid to ethanol of 1:2, temperature of 45oC, turbine rate at 250 rpm, enzyme loading at 5% (w/w oleic acid) and pressure permeate side at 10 mmHg. The result shows that the BCA membrane was high selectivity to water, in which the permeate containing about 95 %(w/w) water could be removed from the reaction mixture with the water flux of 140 – 270 gm-2h-1. Considering less energy consumption, the start operation of pervaporation at the end of the reaction (late pervaporation) to move equilibrium toward biodiesel product is suggested, in which the FFA conversion was increased from 84.37 % to 88.50 % by using the system coupled with the PV unit. On the study of the flow pattern in the reactor, it was shown that the higher initial rate and FFA conversion were obtained by using the expanded bed, as compared to the fixed bed at the same reactor volume. The evaluation of the continuous esterification process in the expanded bed reactor with the retention time of 50 min shows the improved of the FFA conversions from 65.88% to 69.73% by using the system coupled with the PV unit. From the observation of surface morphology of Novozym 435 being used in the esterification by SEM, it was demonstrated that the degrees of swelling of Novozym 435 in the batch and continuous processed coupled with pervaporation were less compared to those from the systems without the PV unit, which could be benefit for long term use of the biocatalyst.

show abstract

Pervaporation membrane reactors (PVMRs) for esterification

Cited by 10 publications

References 125 publications

Polymer nanocomposite membranes and their application for flow catalysis and photocatalytic degradation of organic pollutants

Polymer nanocomposite membranes and their application for flow catalysis and photocatalytic degradation of organic pollutants

Rational Design Method Based on Techno-Economic Principles for Integration of Organic/Organic Pervaporation with Lipase Catalyzed Transesterification

Pervaporation-assisted enzymatic esterification of oleic acid and ethanol

Contact Info

Product

Resources

About