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Device and method for preparing synthesis gas under the assistance of high-temperature electrochemical device

A synthesis gas and electrochemical technology, applied in chemical instruments and methods, hydrogen/syngas production, inorganic chemistry, etc., can solve problems such as carbon deposition in the negative electrode, and achieve the effect of reducing carbon emissions and perfectly coupled operation.

Active Publication Date: 2020-10-23
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of negative electrode carbon deposition in the prior art, the present invention provides a device and method for assisting the preparation of synthesis gas by a high-temperature electrochemical device

Method used

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  • Device and method for preparing synthesis gas under the assistance of high-temperature electrochemical device

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Experimental program
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Embodiment 1

[0026] like figure 1As shown, the device for assisting the preparation of synthesis gas according to the high-temperature electrochemical device of the present invention includes a dehydration treatment device and a solid oxide electrolysis cell (Solid Oxide Electrolysis Cell, SOEC for short) system 8, and industrial waste gas 1 is separated from water vapor by the dehydration treatment device 9 After obtaining the remaining gas 1a, the water vapor 9 enters the SOEC system 8 through the first flow valve for electrolysis, the power supply 7 applies current and voltage to the two ends of the electrolytic cell of the SOEC system 8, and the hydrogen and water vapor mixture of the negative electrode of the electrolytic cell passes through The metal Pd membrane separator 17 performs high-temperature separation to obtain hydrogen 10, and the positive electrode obtains oxygen 11. In this embodiment, the flow rate of water vapor 9 entering the SOEC system 8 is 0.1MpaG, and the power su...

Embodiment 2

[0033] The parts that are the same as those in Embodiment 1 will not be repeated, and only the differences will be given below. The flow rate of water vapor 9 entering the SOEC system 8 through the first flow valve is 5MpaG, and the current and voltage applied to both ends of the electrolytic cell of the SOEC system 8 by the power supply 7 are 20A / 1V. The thermal management system 16 provides thermal energy to the electrolytic cells of the SOEC system 8 such that the operating temperature of the electrolytic cells is 850°C. The flow molar ratio of the remaining gas 1a entering the first desulfurization treatment device 2 to the hydrogen 10a is 20:1. The flow molar ratio of natural gas 6 and hydrogen 10b entering the second desulfurization treatment device 5 is 20:1. The high-purity CO entering the first reaction chamber 3 through the second flow valve 2 The flow molar ratio of the gas and the hydrogen 10 entering the first reaction chamber 3 is 3:1, and the high-purity CH en...

Embodiment 3

[0035] The parts that are the same as those in Embodiment 1 will not be repeated, and only the differences will be given below. The flow rate of water vapor 9 entering the SOEC system 8 through the first flow valve is 2MpaG, and the current and voltage applied to both ends of the electrolytic cell of the SOEC system 8 by the power supply 7 are 15A / 0.9V. The thermal management system 16 provides thermal energy to the electrolytic cells of the SOEC system 8 such that the operating temperature of the electrolytic cells is 750°C. The flow molar ratio of the residual gas 1a entering the first desulfurization treatment device 2 to the hydrogen 10a is 17:1. The flow molar ratio of natural gas 6 and hydrogen 10b entering the second desulfurization treatment device 5 is 13:1. The high-purity CO entering the first reaction chamber 3 through the second flow valve 2 The flow molar ratio of the gas to the hydrogen 10 entering the first reaction chamber 3 is 2.3:1, and the high-purity CH ...

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Abstract

The invention relates to a device for preparing synthesis gas under the assistance of a high-temperature electrochemical device. The device comprises a dehydration treatment device for separating water vapor from industrial waste gas to obtain residual gas, an SOEC system and a desulfurization treatment device; the SOEC system is used for electrolyzing water vapor to obtain hydrogen and oxygen; the desulfurization treatment device is used for carrying out desulfurization treatment on the residual gas and natural gas to respectively obtain high-purity CO2 gas and high-purity CH4 gas; a dual-reforming system comprises a first reaction chamber for preparing synthesis gas by utilizing high-purity CO2 gas and hydrogen to carry out reverse water gas shift reaction and a second reaction chamber for preparing synthesis gas by utilizing high-purity CH4 gas and oxygen to carry out partial oxidation reaction. The invention also relates to a method for preparing the synthesis gas under the assistance of the high-temperature electrochemical device. According to the device for preparing the synthesis gas under the assistance of the high-temperature electrochemical device, through coupling of theSOEC system and the dual-reforming system, industrial waste gas and natural gas can be used for preparing the synthesis gas of different proportions.

Description

technical field [0001] The invention relates to the joint utilization of industrial waste gas and natural gas, and more particularly relates to a device and method for assisting the preparation of synthesis gas by a high-temperature electrochemical device. Background technique [0002] At present, with the increasing severity of the greenhouse effect, human beings are very concerned about global warming and climate change caused by energy consumption. The use of a large amount of fossil fuels and excessive emission of industrial waste gas into the atmosphere are the chief culprits of energy consumption and greenhouse effect. Industrial waste heat contains a large amount of CO 2 And water vapor, accompanied by a large amount of industrial waste heat. Natural gas contains a lot of CH 4 . CO 2 and CH 4 As the main components of greenhouse gases, the emission of these carbon-containing gases into the atmosphere is the main factor that intensifies the global greenhouse effec...

Claims

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Application Information

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IPC IPC(8): C01B32/40C01B3/38C01B3/36C01B3/56C25B1/04
CPCC01B32/40C01B3/38C01B3/36C01B3/505C25B1/04C01B2203/0261C01B2203/1241C01B2203/1258C01B2203/0405Y02E60/36Y02P20/00
Inventor 王建强程付鹏关成志陆越万松
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI