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High-efficiency and low-cost proton exchange membrane water electrolysis hydrogen production control method self-consistent with renewable energy sources and control method thereof

A technology of renewable energy and proton exchange membrane, applied in the direction of electrolysis process, electrolysis components, electrodes, etc., can solve the problems of cost rise, price rise, restriction of popularization and application, etc., and achieve the effect of improving energy conversion efficiency

Active Publication Date: 2021-10-08
苏州朗泰新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal iridium is one of the rarest elements in the earth's crust. With the increasing demand for Ir in industrial production, the prices of Ir-based oxides and Ir-based catalysts are also rising, which has also led to electrolysis of water. The cost of hydrogen electrolysis stacks has risen sharply, which has become a bottleneck restricting the popularization and application of this technology

Method used

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  • High-efficiency and low-cost proton exchange membrane water electrolysis hydrogen production control method self-consistent with renewable energy sources and control method thereof
  • High-efficiency and low-cost proton exchange membrane water electrolysis hydrogen production control method self-consistent with renewable energy sources and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: Monodisperse Ir-MnO 2 As an anode catalyst for PEMWEs operating at low voltage

[0062] MnO 2 The corrosion dissolution potential is 1.75V vs. RHE, based on which a single-atom Ir-doped MnO 2 Catalyst (Ir-MnO 2 ), wherein the atomic ratio of Ir is 0.87%. Using it as an OER catalyst in acidic environment, at 10mA cm -2 It can run stably for more than 600h under the current density. with Ir-MnO 2 As PEMWEs anode catalyst material, assemble electrolysis water pool. Set the system protection voltage to the single-chip electrolysis voltage of 1.75 V. When the single-chip input voltage is greater than 1.75 V, the high-iridium content oxygen evolution catalyst system PEM electrolytic stack unit operates to produce hydrogen by electrolysis; when the single-chip input voltage is less than 1.75 V, the single-chip Disperse Ir-MnO 2 Oxygen evolution catalyst system PEM electrolysis stack unit runs electrolytic hydrogen production.

Embodiment 2

[0063] Example 2: Ti-doped RuO 2 As an anode catalyst for PEMWEs operating at low voltage

[0064] RuO 2The corrosion dissolution potential is 1.5V vs. RHE, and it is modified by Ti doping to obtain Ti-doped RuO with high activity at low potential. 2 Material (Ti-RuO 2 ), the current density exceeds 100mA cm at 1.43V vs. RHE potential -2 . Using it as an OER catalyst in an acidic environment, at 10mA cm -2 It can run stably for more than 30h under the current density. Ti-RuO 2 As a PEMWEs anode catalyst material, an electrolytic water pool is assembled. Set the system protection voltage to the monolithic electrolysis voltage of 1.5V. When the monolithic input voltage is greater than 1.5V, the high iridium content oxygen evolution catalyst system PEM electrolytic stack unit runs electrolytic hydrogen production; when the monolithic input voltage is less than 1.5V, the Ti doped RuO 2 Oxygen evolution catalyst system PEM electrolytic stack unit runs electrolytic hydrogen...

Embodiment 3

[0065] Example 3: MnO 2 As an anode catalyst for PEMWEs operating at low voltage

[0066] MnO 2 The corrosion dissolution potential is 1.75V vs. RHE, which is directly used as an OER catalyst in an acidic environment, at 10mA cm -2 It can run stably for more than 8000h under the current density. MnO 2 As PEMWEs anode catalyst material, assemble electrolysis water pool. Set the system protection voltage to the single-chip electrolysis voltage of 1.75 V. When the single-chip input voltage is greater than 1.75 V, the high-iridium content oxygen evolution catalyst system PEM electrolytic stack unit operates to produce hydrogen by electrolysis; when the single-chip input voltage is less than 1.75 V, the MnO 2 Oxygen evolution catalyst system PEM electrolytic stack unit runs electrolytic hydrogen production.

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Abstract

The invention provides a high-efficiency and low-cost proton exchange membrane water electrolysis hydrogen production control method self-consistent with renewable energy sources and a control system thereof, aiming at the characteristics of low iridium or no iridium oxygen evolution catalyst, the input voltage is controlled in the actual operation process of a PEM electrolysis unit with low iridium or no iridium oxygen evolution catalyst; the voltage upper limit is set to enable the input voltage to be lower than the oxidation dissolution potential of the anode low-iridium oxygen evolution catalyst or the iridium-free oxygen evolution catalyst, namely the stable voltage of the low-iridium oxygen evolution catalyst or the iridium-free oxygen evolution catalyst can be ensured, so that the low-iridium oxygen evolution catalyst or the iridium-free oxygen evolution catalyst is prevented from being excessively oxidized and dissolved, and the catalyst is quickly inactivated; therefore, the oxygen evolution catalyst with low iridium content or without iridium element is used for coping with low-fluctuation stable operation power supply response, the cost of an electrolysis system can be effectively reduced by using the oxygen evolution catalyst with high iridium content, and the comprehensive energy conversion efficiency of an electrolysis unit is improved.

Description

technical field [0001] The invention relates to the technical field of hydrogen production by proton exchange membrane (PEM) electrolysis of water, in particular to a high-efficiency and low-cost proton exchange membrane electrolysis water hydrogen production control system and control method that are self-consistent with renewable energy. Background technique [0002] The hydrogen economy is a future energy economic structure proposed in the 1970s with hydrogen as the medium (storage, transportation and transformation). At present, China's energy structure is gradually shifting from traditional fossil energy to a diversified pattern dominated by renewable energy. Hydrogen is a clean energy that does not produce pollutants during its application. Converting renewable energy such as solar energy, wind energy, and water potential energy into electrical energy, and using an electrolytic cell to electrolyze water to produce hydrogen is an effective way for sustainable energy ut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B15/023C25B1/04C25B9/70C25B11/075C25B11/079C25B11/081C25B11/089C25B11/091
CPCC25B15/023C25B1/04C25B9/70C25B11/075C25B11/081C25B11/089C25B11/091C25B11/079Y02E60/36Y02P20/133
Inventor 邢巍梁亮刘长鹏葛君杰金钊李晨阳
Owner 苏州朗泰新能源科技有限公司
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