Membrane Electroreactors Process Polar/non-polar Systems

The idea of membrane electroosmosis proposed in this paper is derived from pervaporation(referred to as PV).Pervaporation is an efficient,energy-saving and environment-friendly membrane separation technology.It is a new green liquid separation technology after traditional separation technologies such as rectification,extraction and absorption.It has the advantages of energy saving,low consumption and environmental friendliness.It is used in more and more fields.The removal of water in organic matter,the recovery of valuable organic matter in water,organic-organic separation have good prospects in the field.At the same time,it is highly selective for the separation of liquid mixtures with similar boiling points,because of not being limited by the vapor-liquid equilibrium conditions.However,the key of pervaporation is pervaporation membrane.The traditional polysulfone membrane not only has good selectivity and separation,but also has excellent chemical stability,mechanical elongation and acid-base resistance.However,the polysulfone membrane can easily adsorb impurities,resulting in reduced service life.At the same time,the hydrophobicity of the polysulfone membrane leads to a smaller water flux and affects the separation efficiency.However,graphene oxide(GO)has become increasingly important in the field of membrane separation due to its excellent separability,hydrophilicity and the like.Therefore,we prepared graphene oxide/polysulfone(GO/PSF)composite films;and we used Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),contact angle measurement,self-designed pure water flux devices,The morphological characteristics,average pore size,porosity,hydrophilicity and pure water flux of the membrane were observed by experiments.The effects of graphene oxide modification on the structure and properties of polysulfone membranes were also discussed.At the same time our group is also based on the traditional membrane pervaporation device innovation,using its own design membrane electroosmosis device,at room temperature in the feed side and permeate side are added to the flat-plate electrode.By introducing electrostatic field to replace the traditional temperature difference as a driving force to promote mass transfer,thereby enhancing the permeate flux.The changes of pervaporation fluxes were observed by changing the electric field intensity and the dielectric concentration through experiments.The effects of the above factors on the permeation fluxes were recorded.The experimental results show that the surface of graphene oxide has a large number of oxygen-containing functional groups by Fourier transform infrared spectroscopy.After adding graphene oxide,the surface roughness,average pore diameter,porosity,hydrophilicity,Sulfone membrane are significantly improved.At the same time,adding the electric field to the membrane infiltration device can increase the flux of water,and the flux of water increases with the increase of the voltage.After adding NaCl,the increase rate of water flux compared with that of pure water is The water flux decreases with the increase of the distance between the plate electrodes.