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Simulation device and method for recycling waste heat and reducing energy consumption of water electrolysis for hydrogen production

A simulation device, waste hot water technology, applied in the electrolysis process, electrolysis components, energy input and other directions, can solve the problems of difficult to recover low-quality waste heat, low power conversion efficiency, waste of resources, etc., to improve energy utilization efficiency and reduce power consumption, reducing the effect of overpotential

Inactive Publication Date: 2019-04-23
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the existing technology, one is that the existing waste heat recovery technology is difficult to recover low-quality waste heat, resulting in waste of resources, and the other is that the electrolysis of water for hydrogen production technology has a low power conversion efficiency due to the large overpotential of oxygen evolution and hydrogen evolution reactions The problem

Method used

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  • Simulation device and method for recycling waste heat and reducing energy consumption of water electrolysis for hydrogen production
  • Simulation device and method for recycling waste heat and reducing energy consumption of water electrolysis for hydrogen production
  • Simulation device and method for recycling waste heat and reducing energy consumption of water electrolysis for hydrogen production

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Embodiment 1

[0026] Pass warm water with a temperature of 20 °C into the heating jacket to simulate waste water, and use it as the heat source for electrolysis of water, use high-temperature treated carbon cloth as the positive electrode plate, platinum sheet as the negative electrode plate, and Ag / AgCl electrode as the reference electrode. For the specific electrode, 1M KOH solution was used as the electrolyte, and the oxygen evolution reaction performance of the carbon cloth material to electrolyze water to produce hydrogen was tested in an atmospheric pressure electrolyzer. The test results of the polarization curve are as follows figure 2 As shown, the test method adopts the voltammetry curve method, and the test voltage range is 0.3-0.8V vs.Ag / AgCl. Start the heating mantle, when the temperature rises from 20°C to 40°C, it can be seen from the figure that at 10mA cm -2 Under the current density, the overpotential decreased from 380mV to 310mV.

Embodiment 2

[0028] Pass warm water with a temperature of 20 °C into the heating jacket to simulate waste water, and use it as the heat source for electrolysis of water, use high-temperature treated carbon cloth as the positive electrode plate, platinum sheet as the negative electrode plate, and Ag / AgCl electrode as the reference electrode. For the specific electrode, 1M KOH solution was used as the electrolyte, and the oxygen evolution reaction performance of the carbon cloth material to electrolyze water to produce hydrogen was tested in an atmospheric pressure electrolyzer. The test results of the polarization curve are as follows image 3 As shown, the test method adopts the voltammetry curve method, and the test voltage range is 0.3-0.8V vs.Ag / AgCl. Start the heating mantle, when the temperature rises from 20°C to 80°C, it can be seen from the figure that at 10mA cm -2 Under the current density, the overpotential is reduced from 380mV to 200mV. It can be seen that using waste heat to...

Embodiment 3

[0030] Feed warm water with a temperature of 20°C into the heating jacket to simulate waste water, and use it as a heat source for electrolysis of water, use high-temperature-treated foamed nickel as the anode plate, platinum as the cathode plate, and use 1M KOH solution as the electrolysis Liquid, test the total water splitting performance of foamed nickel material in a high-pressure electrolyzer. The test results of the polarization curve are as follows Figure 4 As shown, the test method adopts the voltammetry curve method, and the test voltage range is 1.2–2V. Start the heating mantle, when the temperature rises from 20°C to 80°C, it can be seen from the figure that at 10mA cm -2 Under the current density, the overpotential decreased by 195mV.

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Abstract

The invention belongs to the technical field of energy utilization, and relates to a simulation device and method for recycling waste heat and reducing energy consumption of water electrolysis for hydrogen production. The method comprises the following steps: (1) placing an electrolytic tank containing electrolyte in a heating sleeve, and heating the electrolyte by using the heating sleeve; (2) setting a power supply voltage as the voltage required by water electrolysis, and turning on a power switch to start the electrolysis. By adopting the simulation device and method for recycling waste heat and reducing energy consumption of water electrolysis for hydrogen production, the problem that low-quality waste heat is difficult to recycle can be solved, and the energy utilization efficiency can be increased; and secondly, the waste heat increases the temperature of the electrolyte, thereby effectively improving the physical properties of the electrolyte such as ion migration rate, conductivity, and the like, improving the electrolysis water reaction kinetics, reducing the overpotential of electrolysis water reaction, and reducing the consumption of electric energy.

Description

technical field [0001] The invention relates to a simulation device and a method for recycling and utilizing waste heat to reduce energy consumption of hydrogen production by electrolysis of water, and belongs to the technical field of energy utilization. Background technique [0002] With the continuous consumption of fossil energy and the increasing environmental pollution caused by its use, improving energy utilization efficiency and developing new clean energy have become research hotspots. Among them, waste heat resources (especially sensible heat resources below 150°C) from industrial production such as chemical plants, power plants, and steel plants are difficult to recycle, which is one of the sources of huge energy loss and waste of resources. So far, researchers have continued to try and make some breakthroughs in the recycling of sensible heat, but there are still deficiencies in the application process. For example, blast furnace slag washing water is used in ur...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B15/00
CPCC25B1/04C25B15/00Y02E60/36Y02P20/129
Inventor 邱介山黄红菱于畅黄华伟姚秀超任勇文崔崧谭新义常江伟
Owner DALIAN UNIV OF TECH
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