Search results for "Pervaporation membrane"

showing 3 items of 3 documents

Heterogeneous Photocatalysis and Photoelectrocatalysis: From Unselective Abatement of Noxious Species to Selective Production of High-Value Chemicals

2015

Heterogeneous photocatalysis and photoelectrocatalysis have been considered as oxidation technologies to abate unselectively noxious species. This article focuses instead on the utilization of these methods for selective syntheses of organic molecules. Some promising reactions have been reported in the presence of various TiO2 samples and the important role played by the amorphous phase has been discussed. The low solubility of most of the organic compounds in water limits the utilization of photocatalysis. Dimethyl carbonate has been proposed as an alternative green organic solvent. The recovery of the products by coupling photocatalysis with pervaporation membrane technology seems to be a…

Membrane reactorSettore ING-IND/25 - Impianti ChimiciQuantum yieldPhotochemistryRedoxchemistry.chemical_compoundPhotocatalysi4-METHOXYBENZYL ALCOHOLANATASEAROMATIC ALCOHOLSTIO2 PHOTOCATALYSISGeneral Materials SciencePhysical and Theoretical ChemistrySolubilityAQUEOUS SUSPENSIONSettore ING-IND/24 - Principi Di Ingegneria ChimicaTITANIUM-DIOXIDEChemistryLIGHT IRRADIATIONSubstrate (chemistry)P-ANISALDEHYDEAmorphous phaseWATER OXIDATIONPervaporation membranePARTIAL OXIDATIONChemical engineeringSettore CHIM/03 - Chimica Generale E InorganicaPhotocatalysisPhotoelectrocatalysisDimethyl carbonateWater detoxificationGREEN SYNTHESIS
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Pervaporation membrane reactors

2013

Pervaporation is a peculiar membrane separation process which is now considered for the integration with some types of reactions in new promising and interesting applications. Indeed, pervaporation membrane reactors are suitable to some specific utilizations also in sustainable chemistry, which is an area currently characterized by a growing interest. The fundamentals of this type of membrane reactors are presented and the advantages and the difficulties in many applications are discussed and reviewed with particular attention to the opportunities for future developments.

Catalytic membranesPervaporationMembrane reactorIntegrated proceProcess intensificationbusiness.industryChemistryMembrane reactorPervaporationProcess engineeringbusinessPervaporation membraneMembrane technology
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A PERVAPORATION PHOTOCATALYTIC REACTOR FOR THE GREEN SYNTHESIS OF VANILLIN

2012

Abstract Pervaporation is the ideal membrane separation process to be coupled with photocatalysis for the green synthesis of vanillin from ferulic acid. In fact the operative conditions of the two processes are absolutely congruent and the integration is straightforward even operating with separate equipments. The utilization of a highly selective membrane allows the continuous recovery of vanillin by pervaporation from the reacting solution, so that its oxidative degradation is largely avoided and the yield is substantially enhanced. The effects of the main parameters are analyzed resorting to a mathematical model, which is validated by a comparison with the experimental data. In particula…

General Chemical EngineeringTiO2 photocatalysis pervaporation green synthesisMembrane reactorIndustrial and Manufacturing EngineeringMembrane technologyReaction ratechemistry.chemical_compoundPhotocatalysiEnvironmental ChemistryOrganic chemistryVANILLINMembrane reactorChemistryIntegrated proceVanillinINTEGRATED PROCESSPROCESS INTENSIFICATIONGeneral ChemistryMembranePhotocatalysis Pervaporation Membrane reactor Integrated process Green chemistry VanillinChemical engineeringGreen chemistryPERVAPORATIONYield (chemistry)PhotocatalysisPervaporationPHOTOCATALYSIS
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