Method and device for simplifying thermo-chemical ZnSI cyclic decomposition of carbon dioxide and water

A technology of carbon dioxide and thermochemistry, applied in chemical instruments and methods, carbon monoxide, separation methods, etc., can solve the problems of high decomposition reaction temperature, complicated reaction steps, and difficult reverse reaction, etc., to reduce reaction steps, reduce the maximum heat source temperature, and operate Easy to run effect

Active Publication Date: 2015-04-01
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the system has complex reaction steps, ZnI 2 The decomposition reaction temperature is high and the decomposition rate is low, and the reverse reaction is not easy to control, etc.

Method used

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  • Method and device for simplifying thermo-chemical ZnSI cyclic decomposition of carbon dioxide and water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Set ZnI 2 with CO 2 The molar ratio is 1:1, the temperature of the reactor is raised to 1000°C at 1 atm and kept at a constant temperature, the temperature of the gas-solid separator is maintained at a constant temperature of 200°C, and the water cooling temperature of the iodine separation device is 30°C. According to the set ZnI 2 with CO 2 The molar ratio of the CO 2 , ZnI 2 Simultaneously into ZnI 2 / CO 2 Decompose the reaction generator to react (ZnI 2 →Zn+I 2 , CO 2 +Zn→ZnO+CO); Subsequently, the gas produced with solid products passes through the gas-solid separator, iodine separation device and gas collection device in turn to obtain solid products (ZnO, ZnI 2 mixture), solid I 2 and the final product CO. The resulting ZnO, ZnI 2 The mixture is fed into ZnI 2 Generate a reaction device that reacts with HI provided by the HI phase concentration and decomposition system in the presence of water at 1atm and 90°C (ZnO+HI→ZnI 2 +H 2 O) get ZnI 2 solut...

Embodiment 2

[0060] Set ZnI 2 with CO 2 The molar ratio is 1.5:1, the temperature of the reactor is raised to 800°C at 1 atm and kept at a constant temperature, the temperature of the gas-solid separator is maintained at a constant temperature of 200°C, and the water cooling temperature of the iodine separation device is 20°C. According to the set ZnI 2 with CO 2 The molar ratio of the CO 2 , ZnI 2 Simultaneously into ZnI 2 / CO 2 Decompose the reaction generator to react (ZnI 2 →Zn+I 2 , CO 2 +Zn→ZnO+CO); Subsequently, the gas produced with solid products passes through the gas-solid separator, iodine separation device and gas collection device in sequence to obtain solid products (Zn (trace), ZnO, ZnI 2 mixture), solid I 2 and the final product CO. The resulting Zn (trace), Zn and ZnI 2 The mixture is fed into ZnI 2 Generate a reaction device that reacts with HI provided by the HI phase concentration and decomposition system in the presence of water at 1atm and 50°C (ZnO+HI→Z...

Embodiment 3

[0062] Set ZnI 2 with CO 2 The molar ratio is 3.5:1, the temperature of the reactor is raised to 600°C at 1 atm and kept at a constant temperature, the temperature of the gas-solid separator is maintained at a constant temperature of 200°C, and the water cooling temperature of the iodine separation device is 0°C. According to the set ZnI 2 with CO 2 The molar ratio of the CO 2 , ZnI 2 Simultaneously into ZnI 2 / CO 2 Decompose the reaction generator to react (ZnI 2 →Zn+I 2 , CO 2 +Zn→ZnO+CO); Subsequently, the gas produced with solid products passes through the gas-solid separator, iodine separation device and gas collection device in sequence to obtain solid products (Zn (trace), ZnO, ZnI 2 mixture), solid I 2 and the final product CO. The resulting Zn (trace), Zn and ZnI 2 The mixture is fed into ZnI 2 Generate a reaction device that reacts with HI provided by the HI phase concentration and decomposition system in the presence of water at 1atm and 20°C (ZnO+HI→Zn...

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Abstract

The invention relates to the field of thermo-chemical cycle systems, and aims to provide a method and a device for simplifying thermo-chemical ZnSI cyclic decomposition of carbon dioxide and water. The method mainly comprises the following steps: performing isothermal reaction on ZnI2 and CO2 to obtain Zn, ZnO, ZnI2, I2 and CO, then performing gas-solid separation, separating CO out from the gas product, reacting the solid product, water and HI to generate ZnI2 and H2O, and preparing ZnI2 solid. The device comprises a distillation tower, a solid feeding device, a ZnI2 / CO2 decomposition reaction generator, a gas-solid separation device, an iodine separation and recovery device, a ZnI2 generator, an HI phase concentrate decomposition system and a Bunsen reaction system. By adopting the method and the device, a thermo-chemical ZnSI cycle system is simplified from a six-step mode to a five-step mode, so that the reaction steps are reduced, the reaction device is simplified, the operation is convenient, no additional matters are introduced and the initial input cost is reduced.

Description

technical field [0001] The invention relates to the field of thermochemical cycle systems, in particular to a method and device for simplifying thermochemical ZnSI cycle decomposition of carbon dioxide and water. Background technique [0002] With the increasing global warming effect, CO 2 The issue of emission is getting more and more attention from all over the world, how to effectively reduce CO 2 Emissions have become an important political and economic issue around the world. The "Kyoto Agreement" signed at the Copenhagen World Climate Conference in 2009 stipulates that all countries in the world must target CO 2 The United States, Britain, Germany, Japan and other countries have adopted certain measures for CO2 emissions. 2 emission regime, CO 2 Comprehensive utilization and other aspects have been studied. [0003] Currently, the control of CO 2 The emission measures mainly include two aspects: (1) adjust the energy structure, use low-carbon energy, gradually re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/18B01D53/62B01D53/81C01B32/40
CPCY02A50/20Y02P20/151
Inventor 张彦威邱坤赞王智化周俊虎岑可法刘建忠杨卫娟周志军黄镇宇程军
Owner ZHEJIANG UNIV
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