Equipment for directly producing hydrogen through osmotic energy and use method for equipment

A kind of salt difference energy and direct technology, applied in the direction of diaphragm, cell, electrolysis process, etc., can solve the problems of high energy consumption of hydrolysis, large energy consumption, harsh selection of metal electrodes, etc., achieve high hydrogen production efficiency, reduce energy consumption, improve The effect of electrode stability

Active Publication Date: 2017-11-07
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If a conventional reverse electrodialysis device is used to generate electric energy as an energy source to drive a conventional electrolyzer to prepare hydrogen, there will be the following problems: (1) Both sets of devices need to have a pair of electrodes on both sides, and an electrochemical reaction occurs, Large energy consumption; (2) There is only one diaphragm between the cathode and the anode in the water electrolyzer, and the hydrogen and oxygen generated on the electrodes on both sides of the diaphragm will pass through the diaphragm to mix; (3) In the conventional water electrolyzer, the standard electrode Potential E 0 =1.229V, the energy consumption of hydrolysis is high, and the electrolyte is the same in the cathode chamber and the anode chamber, the selection of metal electrodes is very harsh

Method used

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  • Equipment for directly producing hydrogen through osmotic energy and use method for equipment
  • Equipment for directly producing hydrogen through osmotic energy and use method for equipment
  • Equipment for directly producing hydrogen through osmotic energy and use method for equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0070] This example uses figure 1 The equipment shown in the figure can directly produce hydrogen by using the salt difference. The concentrated solution used is an aqueous sodium chloride solution with a concentration of 4.0mol / L, the light solution used is an aqueous sodium chloride solution with a concentration of 0.017mol / L, and the lye used is an aqueous sodium hydroxide solution with a concentration of 0.5mol / L , and the acid solution used is an aqueous hydrochloric acid solution with a concentration of 2.0 mol / L.

[0071] Construction basis figure 1 The equipment that can directly produce hydrogen by utilizing the salt difference shown in , in which 20 cation exchange membranes and 20 anion exchange membranes are used in total, and 19 concentrated solution chambers and 20 dilute solution chambers are formed in the reverse electrodialysis device combination unit. The anode and cathode plates used are ruthenium-coated titanium plates produced by Baoji Qixin Titanium In...

Embodiment 2

[0081] In a similar manner to Example 1 by figure 1 The equipment that can directly produce hydrogen by using the salt difference shown in , the difference is that the concentration of hydrochloric acid in the acid solution is changed to 1.0mol / L, and the concentration of sodium hydroxide in the lye is changed to 0.5 mol / L.

[0082] Measure the change of current and hydrogen production rate in the direct hydrogen production process of the salt difference, the results are shown in image 3 and Figure 4 ,in image 3 It is the current diagram in the direct hydrogen production process of the embodiments 1, 2, 3 and 4; Figure 4 It is the change diagram of hydrogen production rate in the process of direct hydrogen production by salt difference.

[0083] In this embodiment, the device can continuously generate current, and a stable hydrogen production rate of 1.89ml / min can be detected.

Embodiment 3

[0085] In a similar manner to Example 1 by figure 1 The equipment shown in that can directly produce hydrogen by using the salt difference, the difference is that the concentration of hydrochloric acid in the acid solution is changed to 0.5mol / L, and the concentration of sodium hydroxide in the lye is changed to Change to 0.5mol / L.

[0086] Measure the change of current and hydrogen production rate in the direct hydrogen production process of the salt difference, the results are shown in image 3 and Figure 4 ,in image 3 It is the current diagram in the direct hydrogen production process of the embodiments 1, 2, 3 and 4; Figure 4 It is the change diagram of hydrogen production rate in the process of direct hydrogen production by salt difference.

[0087] In this embodiment, the device can continuously generate current, and a stable hydrogen production rate of 1.79ml / min can be detected.

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Abstract

The invention provides equipment for directly producing hydrogen through osmotic energy and a use method for the equipment. Specifically, the equipment for directly producing the hydrogen through the osmotic energy comprises a reverse electrodialysis device, an anolyte storage tank, a catholyte storage tank, a concentrated solution storage tank and a diluted solution storage tank. According to the technical scheme, under the circumstance that a power source is not added externally, potential energy difference of saline solutions with different concentrations is used, an alkaline electrolyte and an acidic electrolyte are adopted in an anode chamber and a cathode chamber on the two sides of the reverse electrodialysis device correspondingly, hydrolysis half-reaction occurs on an electrode of the reverse electrodialysis device directly, the hydrogen and oxygen are generated, and the gases are separated on line through a gas-liquid separation system. Through the equipment and the use method, energy consumption of hydrolysis hydrogen production can be lowered, the electrode stability is improved, the process is simple, externally added energy is not needed, pollution is avoided, and hydrogen production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of hydrogen energy, and specifically relates to a device for directly producing hydrogen through reverse electrodialysis by using the salt difference energy as a direct driving force and a method for using the same. Background technique [0002] With the development of the world economy, traditional fossil energy sources such as oil, natural gas, and coal are facing the plight of being exhausted, and the problems of global warming and air pollution caused by burning fossil energy sources are also becoming more and more serious. Research and development of new renewable energy sources is the solution An important tool for the energy and environmental crisis. Studies have proved that renewable energy such as wind energy, solar energy, tidal energy, salt difference energy and hydrogen energy can replace traditional fossil fuels. Hydrogen energy has no pollution to the environment due to its easy storage, high e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/10C25B13/02C25B9/08C25B9/00C25B9/19
CPCC25B9/00C25B13/02C25B1/04C25B9/73C25B9/19Y02E60/36
Inventor 徐铜文陈霞蒋晨啸王秋月
Owner UNIV OF SCI & TECH OF CHINA
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