Hydrogen production method based on solid oxide electrolyzed water
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A technology of solid oxide and electrolysis of water, which is applied in the direction of electrolysis components and electrolysis processes, etc., can solve the problems of low hydrogen evolution efficiency, low intermolecular activity, and low efficiency of electrolysis of water, and achieve high efficiency, efficiency improvement, thermodynamics and chemistry The effect of improving dynamic characteristics
Pending Publication Date: 2021-12-31
SICHUAN HUANENG HYDROGEN TECH CO LTD +9
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The existing electrolyzed water based on solid oxide is usually at normal temperature, the intermolecular activity is low, and the m
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Embodiment 1
[0049] A method for producing hydrogen based on solid oxide electrolysis of water described in this embodiment comprises the following steps,
[0050] Step S1, constructing a flat-plate solid oxide electrolytic cell;
[0051] Specifically, the solid oxide electrolytic cell is a high-efficiency, low-pollution energy conversion device that can convert electrical energy and thermal energy into chemical energy. In principle, the solid oxide electrolytic cell, that is, SOEC, can be regarded as a solid oxide The reverse operation of the fuel cell (SOFC); and because the flat electrolytic cell has high energy density, and the manufacturing cost is relatively low, it is chosen to build a flat solid oxide electrolytic cell.
[0052] More specifically, the solid oxide electrolytic cell includes a dense electrolyte layer, a porous hydrogen electrode and a porous oxygen electrode. Among them, the dense electrolyte layer is used to separate air, oxygen and fuel gas, and to conduct oxygen ...
Embodiment 2
[0073] On the basis of Example 1, a method for producing hydrogen based on solid oxide electrolysis of water described in this example also includes the following steps,
[0074] Step S7, detecting the degree of polarization of the solid oxide electrolytic cell, and judging the loss of the electrode;
[0075] Step S8, performing adaptive supplementation based on the electrode loss amount obtained in step S7.
[0076] During use, the electrolytic reaction can be maintained continuously by monitoring the electrode loss in real time and replenishing it.
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Abstract
The invention discloses a hydrogen production method based on solid oxide electrolyzed water, and relates to the field of hydrogen production based on electrolyzed water. The hydrogen production method based on solid oxide electrolyzed water comprises the following steps: S1, constructing a flat plate type solid oxide electrolytic tank; S2, preparing distilled water, heating the distilled water to vaporize the distilled water to form high-temperature water vapor flowing in one direction, and inputting the high-temperature water vapor into the solid oxide electrolytic tank; S3, applying a direct-current voltage to the electrodes on the two sides in the solid oxide electrolytic tank; S4, enabling the electrolytic tank to be subjected to heat preservation, and keeping the temperature of the electrolytic tank at 700-900 DEG C; S5, collecting the hydrogen separated out of the solid oxide electrolytic tank, carrying out cooling and carrying out compressing. The solid oxide electrolytic tank based on the high-temperature state is adopted for water electrolysis hydrogen production, the water electrolysis efficiency is higher, and for high-temperature electrolysis, the water electrolysis efficiency is greatly improved due to the fact that the thermodynamic and chemical kinetic characteristics of the electrolytic reaction are improved.
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 solid oxide 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. [0003] However, the electrolytic water hydrogen pro...
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