Hydrogen production method based on proton exchange membrane electrolyzed water

Abstract

The invention discloses a hydrogen production method based on water electrolysis of a proton exchange membrane, and relates to the field of hydrogen production through water electrolysis, the hydrogen production method based on water electrolysis of the proton exchange membrane comprises the following steps: S1, constructing a PEM electrolytic tank, and installing a pressure sensing unit with a communication function in the PEM electrolytic tank; S2, preparing distilled water, and vaporizing the distilled water to form water vapor in a high-temperature state; S3, cooling the water vapor, and maintaining the temperature of the water vapor at 120 DEG C; S4, introducing water vapor into the PEM electrolytic tank, inputting direct-current voltage between two electrodes of the electrolytic tank, and carrying out hydrogen evolution operation; and S5, after hydrogen is continuously output into the PEM electrolytic tank, performing gas-liquid separation on the output hydrogen. The pressure relief device is used for automatically reducing the pressure in the PEM electrolytic tank, so that the pressure intensity in the PEM electrolytic tank is always kept in a preset range, the reaction can be always performed in the preset pressure intensity range, and the water electrolysis reaction is always kept at relatively high efficiency.

Description

technical field [0001] The invention relates to the field of hydrogen production by electrolysis of water, in particular to a hydrogen production method based on proton exchange membrane electrolysis of water. Background technique [0002] The energy system composed of hydrogen energy and clean primary energy is considered to be the most promising energy system to replace fossil fuels. Today's industrial large-scale hydrogen production methods mainly include steam methane reforming (SMR) and electrolysis of water to produce hydrogen. Steam reforming of methane is currently the most economical large-scale hydrogen production method, but it consumes a lot of fossil fuels and produces a lot of carbon dioxide. At present, the cost of conventional alkaline electrolysis hydrogen production technology is high, the total hydrogen production efficiency is low, and most of the power generation process also consumes fossil fuels and emits CO2. However, the electrolytic water hydrogen...

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Problems solved by technology

[0004] In the existing hydrogen production method based on proton exchange membrane electrolysis of water, the working pressure in the PEM electrolysis cell has been fluctuating due to the continuous electrolysis of water reaction, and the pressure is a key indicator affecting the efficiency of electrolysis of water. As a result, the speed of electrolysis of water has not been at a high level, reducing the efficiency of hydrogen production

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