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Electrochemical zinc-water hydrogen production and storage system and applications thereof

A technology of electrochemical and water hydrogen production, applied in the direction of electrochemical generators, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of expensive high-power power devices, inability to provide hydrogenation and co-combustion of internal combustion engines, and reduce pollution. Achieve the effect of convenient combination, simple processing and low cost

Inactive Publication Date: 2009-10-21
黄潮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as gasoline-electric hybrid technology, which converts excess mechanical energy into electrical energy and stores it in the battery pack, and uses the stored electric energy to drive the vehicle under appropriate circumstances, which can save fuel by 7%-40%; however, the storage battery pack and high-power electrical devices are expensive, making them popular difficulty
In the actual road sports car, adding hydrogen with a mass fraction of about 4% to the internal combustion engine can save fuel by 30-40% and greatly reduce pollution; but at present, traditional hydrogen storage technology cannot provide a convenient hydrogen source for hydrogenation and co-combustion of internal combustion engines

Method used

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  • Electrochemical zinc-water hydrogen production and storage system and applications thereof
  • Electrochemical zinc-water hydrogen production and storage system and applications thereof
  • Electrochemical zinc-water hydrogen production and storage system and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] Example 1 A hydrogen production and hydrogen storage unit with electrodes placed vertically: 80-mesh tinned brass mesh is used as the current collector for the zinc electrode 2, and 10-mesh polyethylene mesh is used as the separator 3, with a space of 2 mm wide separated by polyethylene grafting. Membrane is diaphragm 4, and electrolytic solution 6 is the aqueous solution (mass concentration) that contains 4% zinc oxide, 33% potassium hydroxide, and gas-evolving electrode area is 16cm 2 , electrolyte intermittent circulation.

[0046] Test 1: Charging with a constant current of 0.8 amps, charging time 5-6 minutes, voltage 2.1-2.5 volts; without external voltage, only the gas-evolving electrode and the zinc electrode are discharged in the external circuit to produce hydrogen through the 20-amp current range of the multimeter, and discharge for 30 minutes Finish. Such charging and discharging cycles are repeated ten times.

[0047] Test 2: Charging with a constant curre...

example 2

[0048] Example 2 A hydrogen production and hydrogen storage unit with electrodes placed horizontally: gas evolution electrode 1 uses two layers of foamed nickel sheets, and the effective area of ​​gas evolution electrode 1 is 15cm 2 , 80-mesh tinned brass mesh is the current collector of zinc electrode 2, 10-mesh polyethylene mesh is used for partition 3, and 6 layers are set up to separate a space of 6mm width. Diaphragm 4 is not installed, and electrolyte 6 contains 4% zinc oxide , 33% potassium hydroxide aqueous solution (mass concentration), the electrolyte solution is continuously circulated.

[0049] Charge with a constant current of 0.5 amps, the charging time is 2 hours, and the voltage is 2.1-2.5 volts. Do not drag the discharge, only discharge the gas-evolving electrode and the zinc electrode through the current gear of the multimeter to produce hydrogen until the voltage is less than 1 millivolt, and charge and discharge so repeatedly for ten times.

example 3

[0050] Example 3 45 hydrogen production and hydrogen storage units with electrodes placed vertically: 0.1 mm thick copper sheet is used as the current collector of zinc electrode 2, 3 mm thick rubber is cut into M shape as spacer 12, and polytetrafluoroethylene with a hole diameter of 1.5 cm The net is a partition net 3, which separates a 4mm wide space without a diaphragm 4. The aqueous solution containing saturated zinc oxide, 40% potassium hydroxide, and 1.5% lithium hydroxide (mass concentration) is the electrolyte solution 6, and the area of ​​the gas-evolving electrode is 60 cm per unit 2 . The hydrogen production current can reach 1.5 to 4.0 amps. 9 hydrogen production and storage unit circuits are connected in series, using 8 partitions 10 and 2 end plates 11, assembled into one group by means of filter press, 5 groups of circuits and fluid passages are connected in series respectively, the total area of ​​gas evolution electrodes in this system is 2700 square meters ...

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Abstract

The invention relates to an electrochemical zinc-water hydrogen production and storage system which adopts an electrodeposited zinc electrode. The electrochemical zinc-water hydrogen production and storage system is characterized in that a zinc electrode current collector and a gas-separating electrode are separated and put in an electrolyte, and a positive-divalent zinc compound exists in an aqueous solution of the electrolyte to be a zinc source substance so as to form a unit of the electrochemical zinc-water hydrogen production and storage system which comprises the electrodeposited zinc electrode, the electrolyte and the gas-separating electrode and is mounted in a sealing container to form hydrogen production and storage units; the units or a unit group is connected with an electrolyte storage container and a pump to form the system, and the electrolyte storage container is provided with a water-supplementing passage and connected with a gas-liquid separating device. When hydrogen is produced by electric discharge, the gas-separating electrode is connected with a negative electrode of an external power supply, the zinc electrode is connected with a positive electrode of the external power supply, and a direct current is switched on so that an external voltage of each electrodeposited system unit is smaller than 500 millivolts. The system can circularly produce a great amount of hydrogen at low cost, has prolonged service life, is convenient to linearly amplify and can be used for matching with the oil saving and the emission reduction of internal-combustion engines and other oil-storing and combustion-promoting fields.

Description

technical field [0001] The invention relates to a hydrogen production and storage technology, an electrochemical zinc-water hydrogen production and storage system and its application with an internal combustion engine. Background technique [0002] The applicant's previous application, Electrochemical zinc-water hydrogen production and storage method (200510046374.8, publication number CN1854063A), introduced a cheap, convenient and reusable hydrogen production and storage method. -The electrochemical system composed of electrolyte solution and gas-evolving electrode is realized. When hydrogen storage is required, the negative electrode of the external power supply is connected to the zinc electrode, the positive electrode of the external power supply is connected to the gas-evolving electrode, and a direct current is applied, and the reduction reaction of zinc occurs on the zinc electrode. , on the gas-evolving electrode, an oxidation reaction involving water occurs, and ox...

Claims

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Application Information

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IPC IPC(8): C25B1/02C01B3/00
CPCH01M8/065H01M8/04201Y02E60/324Y02E60/50H01M8/04216C25B5/00
Inventor 黄潮
Owner 黄潮
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