Process and device for preparing hydrogen from hydrogen iodide in iodine-sulfur circulation

A hydrogen iodide and process technology, which is applied in the field of hydrogen iodide production process and equipment in the iodine-sulfur cycle, can solve the problems of reduced hydrogen production efficiency, increased hydrogen production cost, and high energy consumption for electrochemical decomposition, achieving improved The effect of recovery rate, investment and energy consumption reduction, improvement of quality and energy utilization rate
CN113233415AActive Publication Date: 2021-08-10DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2021-08-10

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Abstract

The invention belongs to the related technical field of hydrogen preparation through thermochemical circulation, and provides a process and a device for preparing hydrogen from hydrogen iodide in iodine-sulfur circulation. The device comprises an HIX steam stripping section, a reaction rectifying section, a reaction gas washing section and a steam stripping gas washing process and device. A shell pass and a tube pass of a novel shell-and-tube heat integration composite tower are filled with a 1# filler and a 2# filler respectively, N tower sections of a composite section are coaxially and hermetically connected, and the HIX steam stripping section, the reaction rectifying section and a water washing section are coupled together, so that gradient utilization of energy is realized; the system mixed gas containing O2 and SO2 is used as the circulating stripping gas of the stripping section of the composite tower, so that the generation of S, H2S and a small amount of H2SO4 mingled in an HIX system is inhibited, and the recovery rate of SO2 in HIX is improved; and the tower bottom material liquid of the reaction section of the heat integration composite tower and the acidic water of the washing section and the stripping gas washing tower are returned to the front mixing tank of the Bensen reactor, so that the quality utilization rate of the system is improved.
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Description

technical field

[0001] The invention relates to a process and a device for preparing hydrogen from hydrogen iodide in an iodine-sulfur cycle, and belongs to the related technical field of thermochemical cycle preparation of hydrogen. Background technique

[0002] The main energy supply in the world today comes from fossil fuels. However, fossil fuels are non-renewable and pollute the environment, which does not meet the requirements of carbon neutrality. There are solutions to reduce the environmental impact of fossil fuels, such as carbon capture, storage, and thermal decarbonization. However, while carbon capture can save environmental costs, it cannot be a long-term solution for energy sustainability. Due to the high energy density, cleanness and non-toxicity of hydrogen energy, the formation of more compounds and large reserves, hydrogen energy is considered to be an alternative energy carrier in the future. However, there are many disadvantages in the traditional hydr...

Claims

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