引用本文:
郭贞贞, 陈震, 郑曦, 陈晓, 陈日耀. Ni-P-mCMC/mCS双极膜技术在成对电解制备糠醇、糠酸中的应用[J]. 应用化学,
2010, 27(5): 579-584.
doi:
10.3724/SP.J.1095.2010.90460
Citation: GUO Zhen-Zhen, CHEN Zhen, ZHENG Xi, CHEN Ri-Yao, CHEN Xiao. Electrolysis-generation of Furfural Alcohol and Furoic Acid in Pair by Ni-P-mCMC/mCS Bipolar Membrane[J]. Chinese Journal of Applied Chemistry, 2010, 27(5): 579-584. doi: 10.3724/SP.J.1095.2010.90460
Citation: GUO Zhen-Zhen, CHEN Zhen, ZHENG Xi, CHEN Ri-Yao, CHEN Xiao. Electrolysis-generation of Furfural Alcohol and Furoic Acid in Pair by Ni-P-mCMC/mCS Bipolar Membrane[J]. Chinese Journal of Applied Chemistry, 2010, 27(5): 579-584. doi: 10.3724/SP.J.1095.2010.90460
Ni-P-mCMC/mCS双极膜技术在成对电解制备糠醇、糠酸中的应用
摘要:
以磷酸化试剂改性羧甲基纤维素钠(mCMC)制备了阳膜层,以戊二醛改性壳聚糖(mCS)制备了阴膜层溶胶,将阴膜层溶胶流延于阳膜层上,制备了P-mCMC/mCS双极膜,而后以化学镀方法在阳膜层表面镀镍,制备了Ni-P-mCMC/mCS双极膜,并应用于成对电合成糠醇(阴极室中)、糠酸(阳极室中)。在电场的作用下,双极膜中水电离后生成的H+透过mCMC阳离子膜进入阴极室,促进糠醛电还原生成糠醇过程的进行;OH-透过mCS阴离子膜进入阳极室,与糠醛电氧化生成糠酸过程中产生的H+结合生成H2O,以增大正向反应的速度。在电流密度为2.5×10-2A/cm2,30℃下电解,阴阳两极室的电解效率分别为83.0%和77.4%,电解槽电压稳定在3.0V左右。
English
Electrolysis-generation of Furfural Alcohol and Furoic Acid in Pair by Ni-P-mCMC/mCS Bipolar Membrane
Abstract:
Ni-P-mCMC/mCS bipolar membrane(BPM) was prepared from carboxymethyl cellulose(CMC) modified with phosphorylated agent as a cation exchange layer and chitosan(CS) modified with 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 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 forward reaction speed.The electrolysis efficiency was up to 82.4% in the cathode room and 77.4% in the anode room at 30℃ when the current density was 2.5 × 10-2 A/cm2.
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Key words:
- bipolar membrane
- / furfural alcohol
- / electroless nickel plating
- / electro-synthesis
- / furoic acid
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