利用离子膜电解法改进过硫酸铵生产研究

doi:10.13208/j.electrochem.200902

摘要/Abstract

摘要：

国内工厂生产过硫酸铵大多采用工艺简单且产品纯度高的电解法,但是电解法在生产过程中存在能耗过高的问题。这一问题限制了过硫酸铵在许多领域的进一步发展。针对这一现象,对硫酸铵电解生成过硫酸铵的设备及工艺进行设计和研究,以期达到降低能耗的目的。实验基于零极距和离子交换膜电解槽的设计,研究了加酸量、抑制剂用量、出入口温度和电解液浓度等因素对电解效率的影响。结果表明,在电解液中加酸并且在阳极液中添加抑制剂对提高电流效率和降低槽电压具有很大的影响,在最优条件下电流效率可达到98%,生产过程能耗显著降低。另外,电解槽还具有连续性生产、占地面积小的优势,进一步解决了厂家所面临的生产成本过高的问题。

关键词: 硫酸铵, 过硫酸铵, 离子膜, 电解, 抑制剂

Abstract:

In china, the production of ammonium persulfate in factories mostly adopts the electrolysis method with simple process and high purity. However, there exists the problem of high energy consumption in the electrolysis process, which restricts the further development of ammonium persulfate in many fields. Aiming at this phenomenon, the equipment and technology to produce ammonium persulfate using electrolysis were designed and studied in order to reduce energy consumption. A new type of zero-pole distance and ion-exchange membrane industrial electrolytic cell was provided for the electrolysis production of ammonium persulfate. An ion-exchange membrane was used to separate the electrolytic cell into an anode chamber and a cathode chamber, which avoided mixing of the electrolyte and improved the electrolysis efficiency. A platinum strip was spot welded on a titanium substrate as an anode and an iridium ruthenium oxide layer was coated on a titanium substrate as a cathode. In this experiment, the influences of acid concentration, inhibitor dosage, inlet and outlet temperatures, and electrolyte concentration on the electrolytic efficiency were studied based on the design of zero-pole distance and ion-exchange membrane electrolytic cell. The results show that there were great influences on improving current efficiency and reducing tank voltage by adding acid to electrolyte and inhibitor to anodic solution. Under the optimal conditions, the current efficiency could reach 98% and the energy consumption in production process could be significantly reduced. It can be seen that such a zero-pole distance and ion-exchange membrane electrolytic cell had the advantages of high current efficiency and low energy consumption. In addition, the electrolytic cell had the advantages of continuous production and small floor space, which further solves the problem of high production cost faced by manufacturers. The application of ion-exchange membrane electrolytic cell technology in the electrolysis of ammonium persulfate is an inevitable development.

Key words: ammonium sulfate, ammonium persulfate, ionic membrane, electrolysis, inhibitor

屈乙行, 崔敏, 张聪, 李冲, 李鹏, 任聚杰. 利用离子膜电解法改进过硫酸铵生产研究[J]. 电化学（中英文）, 2021, 27(5): 586-592.

Yi-Hang Qu, Min Cui, Cong Zhang, Chong Li, Peng Li, Ju-Jie Ren. Study on Improving the Production of Ammonium Persulfate by Ion Membrane Electrolysis[J]. Journal of Electrochemistry, 2021, 27(5): 586-592.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.200902

https://electrochem.xmu.edu.cn/CN/Y2021/V27/I5/586

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Number	1	2	3	4	5	6
Anode sulfuric acid concentration (mol·L^-1)	1	1	1	1	0.5	0.5
Catholyte sulfuric acid concentration (mol·L^-1)	1	1	0.5	0.5	1	1
Inhibitor addition	No	Yes	No	Yes	No	Yes
I₁(140 A)	46.7%	78.5%	41.7%	67.5%	33.0%	43.0%
I₂(160 A)	50.0%	96.2%	47.2%	79.0%	43.0%	51.6%
I₃(180 A)	63.7%	98.0%	68.7%	85.0%	50.0%	62.6%
I₄(200 A)	70.0%	98.0%	80.0%	85.0%	53.8%	67.0%

I/A	a			b			c
I/A	U/V	t/℃	W/ ( kW·h·t^-1)	U/V	t/℃	W/ ( kW·h·t^-1)	U/V	t/℃	W/ ( kW·h·t^-1)
140	5.25	30.0	2960	5.04	28.4	1795	4.82	20.9	1443
160	5.45	31.2	3072	5.30	29.0	1483	5.02	23.5	1227
180	5.65	33.5	3185	5.50	27.0	1437	5.23	33.5	1254
200	5.84	34.5	3120	5.80	27.0	1466

J/(kA·m^-2)	U/V	t/℃	Current efficiency η/%	Power consumption W/(kW·h·t^-1)
7	4.59	31.0	78.5	1375
8	4.68	40.0	96.2	1144
9	4.90	43.3	98.0	1175
10	5.02	46.4	98.0	1242