Electro-generation Of Furfural Alcohol And Furoic Acid In Pairs By Ni-P-mCMC/mCS Bipolar Membrane

In order to reduce BPM impedance and accelerate the water dissociation, phosphorylation carboxymethyl cellulose(CMC) membrane was synthesized by phosphorus pentaoxide, triethyl phosphate and phosphoric acid, then modified by Fe3+ as a linking reagent; chitosan (CS) was modified by glutaraldehyde, then blend with PVA. The P-mCMC/mCS bipolar membrane was characterized by FTIR, AC impedance, I-V curves and ion exchange capacity. The results of IR and contact angle analysis showed that the hydrophilic property of CMC is improved after modification. Both of the membrane impedance and the working voltage of the P-mCMC/mCS bipolar membrane are small.Ni-P-mCMC/mCS bipolar membrane was prepared by carboxymethyl cellulose(CMC) and chitosan(CS), which were modified by phosphorylated agent and glutaraldehyde(GA), respectively. The ion exchange capacity of mCMC, mCS membrane and the AC impedence were investigated. Nickel was plated down to the surface of mCMC cation membrane to realize zero polar distance electrolysis in the cathode. H+ generated by electro-splitting water at the interface of the BPM moves into the cathodic chamber in time from mCMC layer to supplement H+ consumed in the electro-reducation process of furfural for generating furfural alcohol;The experimental results showed that furfural alcohol was prepared by electro-reduction of furfural in the cathode room. In comparison with the traditional method, the electro-reduction technology saves the Cu-Cr catalyzer and eliminates the chromium pollution to the environment.Ni-P-mCMC/mCS bipolar membrane was prepared by carboxymethyl cellulose (CMC) modified by phosphorylated agent as a cation exchange layer and chitosan (CS) modified by glutaraldehyde (GA) as an anion exchange layer. The electrolysis cell was constituted by Ni-P-mCMC/mCS BPM as a septum for electro-generating furfural alcohol (in the cathode room) and furoic acid (in the anode room). The experiment results show that H+ generated by the BPM moves into the cathode room in time from the interface layer of the Ni-P-mCMC/mCS BPM to promote the electro-reduction of furfural for generating furfuryl alcohol; OH- moves into the anode room to combine with H+ produced by electro-oxygenation of furfural to generate furoic acid and improve the reaction go along.