Hydrogen Production By Alkaline Water Electrolysis
1500Separation System Purification System
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Hydrogen Production By Alkaline Water Electrolysis
The DC power consumption of this AWE hydrogen production equipment is only 4.4-4.6 kWh/Nm³, which is far more efficient in production than traditional equipment.
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Product Introduction
1500 Nm3/h Alkaline Water Electrolyzer
Advantage
1. Enhanced Adaptability to Fluctuating Power
- With a power fluctuation range spanning from 30% to 120%, this system is optimally suited for harnessing wind and solar energy for hydrogen production. Its wide range enables seamless integration with renewable energy sources, ensuring consistent and efficient operation regardless of fluctuating power inputs.
2. Unwavering Reliability
- Engineered for utmost reliability, this system incorporates advanced features for enhanced safety and longevity. It boasts double security measures with both internal and external sealing, alongside an upgraded fastening system that minimizes electrolyzer leakage even in alternating working conditions. Additionally, the integration of large diameter double pole plate technology and a thick bipolar plate coating exceeding 50μm ensures superior corrosion resistance and prolonged service life, guaranteeing uninterrupted operation.
3. Superior Energy Efficiency
- Designed for optimal energy efficiency, this system employs innovative technologies to minimize DC power consumption. Its new flow-field design undergoes rigorous simulation and testing to achieve uniform flow distribution within fuel cells, while next-generation electrodes exhibit industry-leading overpotentials and enhanced tolerance in electrode reactions. As a result, the comprehensive power consumption is capped at a remarkable ≤4.8 kWh/Nm³, reflecting a commitment to sustainable energy practices.
4. Expedited Cold Start Capability
- Featuring a self-developed lye heating circulation system, this system significantly reduces cold start times by 50%. This innovative solution streamlines operations, ensuring rapid activation and minimizing downtime, thereby enhancing productivity and operational efficiency.
Technical specifications and performance
1. Completely superior for the high hydrogen production capacity
The hydrogen production capacity of this AWE hydrogen production equipment is up to 1500 Nm3/h.
2. Lower consumption but higher efficiency with the DC power consumption of 4.4-4.6 kWh/Nm³
The DC power consumption of this AWE hydrogen production equipment is only 4.4-4.6 kWh/Nm³, which is far more efficient in production than traditional equipment.
3. Extremely pure, ≥99.8% before purification, ≥99.999% after purification
The purity of hydrogen produced by this AWE hydrogen production equipment is more than 99.8% before purification, which can be further upgraded to more than 99.999% after purification. The high-purity hydrogen not only meets the needs of industrial production, but also provides powerful support for scientific research.
4. Stable and reliable with the working pressure of 1.8 MPa and the working temperature of 90±5℃
In addition to the high production capacity, the equipment should maintain stable and reliable operation. The design of this AWE hydrogen production equipment has taken that into consideration. Its working pressure is controlled at 1.8 MPa, and its working temperature is maintained at 90±5°C, which not only ensures the normal operation of the equipment, but also provides safer and more reliable production environment for operators.
5. Efficient operation with the power fluctuation range of 30-120%
The power fluctuation range of this AWE hydrogen production equipment is wide from 30% to 120%, ensuring that the equipment can maintain efficient operation under diverse working conditions.
Name
Parameter
Hydrogen production capacity(Nm3/h)
1500
DC power consumption(kWh/Nm3)
4.4~4.6
Hydrogen purity(Before purification)
≥99.8%
Hydrogen purity(After purification)
≥99.999%
Operating pressure(MPa)
1.8
Operating temperature(℃)
90±5
Power consumption range
30~120%
Scope of Application
1. Growing Demand for Hydrogen Equipment at Transportation Terminals
- The increasing need for hydrogen infrastructure at transportation terminals is evident in the demand for various components. This includes electrolyzers for on-site hydrogen production and hydrogen refueling stations for seamless vehicle refueling. Additionally, there's a requirement for on-board hydrogen storage systems and refueling stations to cater to medium-duty and heavy-duty hydrogen-fueled vehicles. Moreover, the deployment of tube-bundle trucks facilitates the delivery of hydrogen to areas lacking direct hydrogen resources, ensuring widespread accessibility and adoption of hydrogen-powered transportation solutions.
2. Rising Interest in Alternative Equipment for Green Hydrogen Industry
- The burgeoning green hydrogen industry drives demand for alternative equipment tailored to diverse applications. Electrolyzers play a crucial role in producing green hydrogen for ammonia and methanol synthesis, refining, and coal chemical industries. Furthermore, electrolyzers find application as a vital reducing agent in the metallurgical sector, supporting sustainable practices and reducing environmental impact across industrial processes.
3. Increasing Need for Large-Scale Hydrogen Energy Storage
- The necessity for large-scale hydrogen energy storage solutions is driven by fluctuating power generation patterns. Centralized electrolyzers are instrumental in producing hydrogen to store excess energy efficiently. Moreover, integrated hydrogen production and refueling stations, powered by distributed renewable energy sources or synchronized with the grid's valley load, facilitate seamless energy storage and distribution, contributing to grid stability and resilience.
4. Growing Demand for High-Purity Hydrogen in Laboratories and Medical Services
- The demand for high-purity hydrogen in laboratories and medical services underscores the importance of specialized equipment. Small-scale PEM electrolyzers are essential for on-site hydrogen production, catering to the specific needs of laboratories and medical facilities. Additionally, ensuring high-purity hydrogen output is crucial for PEM electrolyzer laboratories, supporting precise research and medical applications that rely on pristine hydrogen sources.
Water electrolysis related processes
Japan has developed a solid polymer water electrolysis process that can use a fluororesin-based ion exchange membrane as a solid electrolyte for proton conductors. As the solid polymer electrolyte becomes thinner, the electrolyte resistance becomes smaller, which is beneficial to electrolysis operation at high current density.
Such as using solid oxide electrolyte. It is possible to apply a high-temperature water electrolysis process using water vapor. The theoretical decomposition voltage of this process is small, the required amount of electrical energy becomes smaller, especially the overpotential that is the resistance to the electrolysis reaction becomes smaller. Therefore, it is expected to be the electrolysis method with the highest efficiency and electrolysis operation with the lowest cell voltage.
In the solid polymer water electrolyzer developed in Japan, the cathode is a platinum-coated graphite electrode material, the anode is an iridium-based alloy and iridium oxide, and the gap between the assembly and the ion exchange membrane is 150 to 300um, thus achieving high efficiency. The cathode matrix is graphite. Titanium is often used as the anode base.
Other experimental methods for water electrolysis
Device I
Use a 500 ml beaker as an electrolyzer. The electrodes are made of thick copper wire covered with plastic tubes. Each end is exposed 2 cm and bent into a hook shape. One end is buckled on the beaker, and the other end is used as an electrode. Use 15% sodium hydroxide solution as the electrolyte and two test tubes of the same size as the air collecting tubes. Since sodium hydroxide solution is corrosive, you can first fill the test tube with sodium hydroxide solution, cover it with a piece of tissue paper and turn it upside down. Because the atmospheric pressure is stronger than the pressure of the liquid in the test tube, the paper will not fall. Insert the test tube upside down under the liquid surface, use tweezers to remove the paper, put the test tube on the electrode, and fix the test tube with cardboard with two round holes. During electrolysis, when a DC power supply of 6 to 12 volts is connected, many bubbles will appear on the two poles. After 3 minutes, about 16 ml of hydrogen can be obtained at the cathode, and about 8 ml of oxygen can be obtained at the anode.
To test the obtained hydrogen and oxygen, you can bend one end of the thick iron wire into a circle, put a piece of cardboard on it, place it under the mouth of the test tube, take it out, and then test it after standing it upright.
Device II
A large salt water bottle with the bottom cut off is used as an electrolytic cell, and the electrodes are made of two thick copper wires passed through a rubber stopper. In order to limit electrolysis to a small area, a bottleneck is used as an electrolyzer. First, fill the bottle with water 3 to 4 cm higher than the electrode, then use a long-neck funnel to inject 15% sodium hydroxide solution into the bottom of the bottle neck, and squeeze the clean water to the upper layer. Fill two test tubes of the same size with clean water and stand them upside down above the electrodes, then turn on the electricity and conduct the experiment in the same way as above. This method is more convenient to operate.
Precautions for water electrolysis
1. The voltage used in electrolyzing water and the concentration of the acid solution are closely related to the rate of gas release. When using a voltage of 18 to 24 volts and a sulfuric acid concentration of 1:6 to 1:8, gas is generated at the two poles at a faster rate and the bubbles are larger. It only takes 4 to 5 minutes to accumulate a certain amount of gas, and an obvious volume can be seen. Compare. 2. The main reason why the oxygen volume obtained by electrolyzing water is low is due to side reactions:
Cathode: 2H2SO4=2H++2HSO4-
Anode: 2H++2e-=H2; H2S2O8++H2O=H2SO4+H2SO5; H2SO5+H2O=H2SO4+H2O2
The hydrogen peroxide generated at the anode is relatively stable in the acidic solution and is not easy to decompose into oxygen, so the volume of oxygen is low. The difference in solubility of oxygen and hydrogen in water is minor. 3. The gas pipe when synthesizing water must be tightly fixed on the iron stand. It is best to put a layer of plastic sheet on the bottom of the glass sink.
4. When synthesizing water, do not use a volume ratio of hydrogen and oxygen of 2:1, because the explosive power is strongest at this time. In order to prevent the glass tube from bursting, you can use nylon yarn or plastic paper to make a protective sleeve over the upper part of the glass tube.
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