A method for co-producing propionic acid and improving the performance of anion-exchange membrane electrolyzed water
An anion exchange membrane and electrolyzed water technology, which is applied in the direction of electrolytic components, electrolytic process, electrolytic organic production, etc., can solve the problems of reducing energy conversion efficiency, shortening the life of electrolytic cells, and low value of O2, achieving high current density and reducing charge Effect of Transfer Impedance
Active Publication Date: 2021-12-03
DALIAN UNIV OF TECH
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Problems solved by technology
Despite decades of progress in this field, there are still some challenges that need to be overcome: (1) In conventional water electrolysis, HER and OER are strictly coupled, thus simultaneously producing H 2 and O 2 , which could lead to explosive H due to gas crossover 2 / O 2 mix
At the same time, the coexistence of hydrogen with oxygen and electrocatalyst will generate reactive oxygen species, which may shorten the lifetime of the electrolyzer; (2) HER rate is usually limited by OER rate, because the kinetics of the latter is slower, which reduces the overall energy conversion efficiency
In addition, OER's product O 2 The value of is not high; (3) is the future H 2 Efficient and low-cost H for economic development 2 Storage and transport systems remain a challenge
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[0022] Test of battery performance with 1mol / L n-propanol electrolyte solution: After the membrane electrode is prepared, the battery is assembled. Connect the battery to IVIUM multi-channel electrochemical workstation to test the electrochemical performance of the battery, advanced pre-humidification. Deionized water was fed from the anode by a peristaltic pump at a flow rate of 5 mL / min. At the same time, nitrogen gas was introduced to remove the air in the device for a period of time, the temperature of the water bath was set to 50°C, the temperature of the heating belt for conveying the feed liquid was set to 50°C, and the temperature of the thermocouples at both ends of the battery was set to 50°C. The electrochemical performance test was started about 30 minutes after the temperature stabilized. Before the official test, the battery is activated by forced activation with variable current to build a good ion and electron transmission channel and give full play to the per...
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The invention discloses a method for co-producing propionic acid and improving the electrolytic water performance of an anion exchange membrane, belonging to the technical field of energy storage. The present invention proposes that propanol is added to the electrolytic solution in the hydrogen production process by the electrolysis of water by the existing anion exchange membrane, so as to improve the electrochemical reaction activity, improve the hydrogen production efficiency, and at the same time obtain propionic acid at the anode. The proposed improved method has a significant boost in the performance of water electrolysis while producing valuable chemicals.
Description
technical field [0001] The invention belongs to the technical field of energy storage, and relates to a method for coproducing propionic acid and improving the performance of electrolyzed water of an anion exchange membrane. Background technique [0002] Since fossil energy is a kind of non-renewable energy and will cause pollution to the environment, people are urged to develop sustainable and clean energy storage and conversion technologies. Production of clean H using electrochemical or photoelectrochemical water splitting techniques 2 , is considered a promising approach for future energy needs. [0003] Electrocatalytic water splitting to generate clean hydrogen driven by renewable energy input has been considered as a promising strategy in the future energy mix. Currently, the state-of-the-art electrocatalysts for water splitting in alkaline solutions are for O 2 IrO by evolution reaction (OER) 2 and for H 2 Pt / C for precipitation reaction (HER). To achieve a lar...
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IPC IPC(8): C25B1/04C25B3/23C25B3/07C25B9/23C25B11/081C25B11/075
CPCY02E60/36
Inventor 焉晓明赵俊贺高红姜晓滨吴雪梅阮雪华郑文姬代岩
Owner DALIAN UNIV OF TECH