A temperature self-maintaining carbon dioxide and water vapor co-electrolysis device and its application method

A carbon dioxide and electrolysis device technology, applied in the field of electrochemistry, can solve problems such as difficulty in large-scale integration into the power grid, difficulty in ensuring stable and continuous power supply, etc., and achieve the effects of avoiding temperature mismatch, compact layout, and efficient thermal coupling

Active Publication Date: 2019-08-16
北京华易氢元科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, renewable energy has regional and intermittent characteristics, and its output is affected by factors such as weather, seasons, day and night, and it is difficult to guarantee a stable and continuous power supply, which makes it difficult to integrate it into the grid on a large scale

Method used

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  • A temperature self-maintaining carbon dioxide and water vapor co-electrolysis device and its application method
  • A temperature self-maintaining carbon dioxide and water vapor co-electrolysis device and its application method
  • A temperature self-maintaining carbon dioxide and water vapor co-electrolysis device and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This embodiment is a temperature self-sustaining co-electrolysis device for carbon dioxide and water vapor applied to one-step synthesis of methane or Fischer-Tropsch fuel. Such as figure 1 As shown, the fuel electrode chamber casing 10 is sealed and connected with the tubular solid oxide electrolytic cell 14, and the entire reactor 7 is divided into a fuel electrode chamber (inside) and an air electrode chamber (outside). In the reaction kettle 7, an annular insulating material 13 is arranged around the fuel electrode chamber housing 10 and the tubular solid oxide electrolytic cell 14. Two holes are drilled on the upper part of the insulating material 13, one of which is used for the tubular solid oxide electrolytic cell. The air electrode collector wire 11 outside the electrolytic cell 14 is drawn out, and the other hole is to provide an air electrode flow channel, so that the air electrode gas can flow out from the air electrode chamber outlet pipe 12 on the upper si...

Embodiment 2

[0056] This embodiment is a start-up method for a temperature self-sustaining carbon dioxide and water vapor co-electrolysis device applied to one-step synthesis of methane or Fischer-Tropsch fuel. Such as image 3 As shown, it is in figure 1 On the basis of the above, a preheater 15, a preheater outlet pipe 16 and an inlet pipe 17 are added. The difference between this embodiment and Embodiment 1 is that the tubular solid oxide electrolytic cell 14 is in an open circuit state, and both the air electrode and the fuel electrode are fed with protective gas nitrogen. Open the communication valve 6, nitrogen passes into the fuel electrode and the air electrode chamber in the reactor 7 from the fuel electrode chamber inlet pipe 5 and the air electrode chamber inlet pipe 9, and passes through the fuel electrode chamber outlet pipe 1 and the air electrode chamber The outlet pipe 12 flows out, and after being recovered and reheated by the preheater, it is passed into the reactor 7 f...

Embodiment 3

[0059] This embodiment is a device for one-step synthesis of methane or Fischer-Tropsch fuel with self-maintaining carbon dioxide and water vapor co-electrolysis tube stack. Such as image 3 shown. The difference between this embodiment and embodiment 1 is that the tubular solid oxide electrolytic cell unit in embodiment 1 is expanded into a tubular solid oxide electrolytic cell stack, and each tubular solid oxide electrolytic cell unit is connected in parallel The air electrode is connected by the air electrode collector wire 11, and the fuel electrode is connected by the collector connection of the fuel electrode chamber inlet pipe 5.

[0060] The advantage of this embodiment is that the stack of tubular solid oxide electrolytic cells is used to realize the parallel connection of multiple tubes, which improves the synthetic fuel yield of the device, and the use of tubular solid oxide electrolytic cells is easier to stack and scale up, and has a compact structure arrangemen...

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Abstract

The invention discloses a temperature self-maintaining carbon dioxide and water vapor co-electrolysis device and an application method thereof. The device comprises a reaction kettle, a fuel electrodechamber and a tube-type solid oxide electrolysis cell, wherein the fuel electrode chamber and the tube-type solid oxide electrolysis cell are arranged in the reaction kettle and are connected in a sealed mode; and an air electrode chamber is arranged on the outer side of the tube-type solid oxide electrolysis cell, and the reaction kettle is internally provided with annular thermal insulation materials around the fuel electrode chamber and the tube-type solid oxide electrolysis cell. The method includes the steps that (1) shielding gas is gradually heated to the working temperature of an electrolysis zone from the room temperature, and the shielding gas is circularly introduced into the fuel electrode chamber and the air electrode chamber inside the reaction kettle in the heating process;(2) after the pressure of the air electrode chamber is stable, the gas at an inlet of the fuel electrode chamber is switched to CO2 / H2O / H2 mixed gas, and after the pressure of the fuel electrode chamber is stable, an external circuit power source is switched on; and (3) the temperature of a chemical reaction zone of the tube-type solid oxide electrolysis cell is regulated and controlled through the temperature of gas at an air electrode inlet, so that the fuel yield is optimized; and the inlet flow ratio of the air electrode chamber to the fuel electrode chamber is 10 or above.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a carbon dioxide conversion device for a solid oxide electrolytic cell, in particular to a temperature self-sustaining co-electrolysis device for carbon dioxide and water vapor applied to one-step synthesis of methane or Fischer-Tropsch fuel and its application method . Background technique [0002] With the development of human society and the advancement of science and technology, the demand for energy is increasing day by day. my country's energy production capacity has reached a large scale, but the energy structure based on traditional coal and other fossil fuels has caused environmental pollution problems such as smog and acid rain, and also caused a large amount of CO 2 emissions, the future energy structure needs to be optimized. Renewable energy is an important part of the future energy structure. In 2016, the total installed capacity of the three ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/00C25B9/00C10G2/00C10L1/02C07C1/04C07C9/04C07C11/04
CPCY02P20/129
Inventor 史翊翔罗宇蔡宁生
Owner 北京华易氢元科技有限公司
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