Method and device for thermochemical cycle mineralization of CO2 and simultaneous decomposition of H2O to produce H2 and co-production of H2SO4

A technology of H2SO4 and thermochemical cycle, applied in the fields of CO2 emission reduction and thermochemical hydrogen production, can solve the problems of low economy and added value, and achieve the effect of easy large-scale industrial application, appropriate reaction temperature and high theoretical thermal efficiency.

Active Publication Date: 2020-05-12
ZHEJIANG UNIV
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Problems solved by technology

On the other hand, CO 2 The main product of mineralization technology is calcium magnesium carbonate, and its economy and added value are low, which is also an important factor restricting its commercial application

Method used

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  • Method and device for thermochemical cycle mineralization of CO2 and simultaneous decomposition of H2O to produce H2 and co-production of H2SO4
  • Method and device for thermochemical cycle mineralization of CO2 and simultaneous decomposition of H2O to produce H2 and co-production of H2SO4

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0034] (1) 14mol of H 2 O, 1.5mol of I 2 and 1mol of SO 2 Send it into the Bunsen reaction device 1, stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 20 ° C and 1 atm to produce a watery HI phase (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0035] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0036] The biphasic solution in the Bunsen reaction unit 1 is separated in the liquid phase separation unit 2;

[0037] (2) Under 120°C, 0.08atm and adiabatic conditions, in H 2 SO 4 Concentrator 4 for H 2 SO 4 The phase solution is subjected to multi-stage sulfuric acid concentration treatment to obtain the final product H 2 SO 4 ;

[0038] (3) the HI separated in the liquid phase separation devi...

specific Embodiment 2

[0047] (1) 15molH 2 O, 5molI 2 and 1molSO 2 Send it into the Bunsen reaction device 1, and stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed. At 70 ° C and 1.5 atm, an autonomous exothermic reaction occurs to produce a watery HI phase (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0048] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0049] The biphasic solution in the Bunsen reaction unit 1 is separated in the liquid phase separation unit 2;

[0050] (2) Under 190°C, 0.69atm and adiabatic conditions, in H 2 SO 4 Concentrator 4 for H 2 SO 4 The phase solution is subjected to multi-stage sulfuric acid concentration treatment to obtain the final product H 2 SO 4 ;

[0051] (3) the HI separated in the liquid phase separation device 2 x pha...

specific Embodiment 3

[0060] (1) 16molH 2 O, 9molI 2 and 1molSO 2 Send into the Bunsen reaction device 1, stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 120 ° C and 2 atm to produce a watery HI phase (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0061] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0062] The biphasic solution in the Bunsen reaction unit 1 is separated in the liquid phase separation unit 2;

[0063] (2) Under 260°C, 1.3atm and adiabatic conditions, in H 2 SO 4 Concentrator 4 for H 2 SO 4 The phase solution is subjected to multi-stage sulfuric acid concentration treatment to obtain the final product H 2 SO 4 ;

[0064] (3) the HI separated in the liquid phase separation device 2 x phase in ...

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Abstract

The invention relates to the field of CO2 emission reduction and thermochemical hydrogen production and aims to provide a method and a device for preparing H2 and coproducing H2SO4 through thermochemical cycle mineralization of CO2 during decomposition of H2O. A Bunsen reaction device is connected with a liquid phase separation device which is connected with a HIx concentration device and a H2SO4concentration device, the HIx concentration device is connected with the Bunsen reaction device and a Mg12 generation reactor which is connected with a Mg12 distillation device, the Mg12 distillationdevice is connected with the Bunsen reaction device and a Mg12 hydrolysis carbonation reactor which is connected with a HI catalytic decomposition reactor, and the HI catalytic decomposition reactor is connected with the Bunsen reaction device. CO2 mineralization technology and hydrogen production through thermochemical sulfur-iodine open cycle decomposition of water are organically combined creatively, and CO2 is mineralized and fixed in mild reaction conditions while H2 and H2SO4 with high added value are coproduced; hydrogen production cycle and mineralization technology are organically combined, so that higher theoretical heat efficiency is realized; the method is proper in reaction temperature and easy for large-scale industrial application.

Description

technical field [0001] The invention belongs to CO 2 The field of emission reduction and thermochemical hydrogen production, specifically related to thermochemical cycle mineralization of CO 2 Simultaneous decomposition of H 2 O to H 2 co-production H 2 SO 4 method and process. Background technique [0002] Since the Industrial Revolution, anthropogenic greenhouse gas emissions have reduced atmospheric CO 2 The concentration rises sharply, while the CO 2 The large-scale emission of greenhouse gases is the main cause of global warming. Global warming is harmful to human beings and the entire earth's environmental system, CO 2 Emission reduction efforts are significant. [0003] Currently, CO 2 The capture and storage (CCS) technology of China is the main end-use emission reduction strategy and has been extensively studied. However, due to the high cost and energy consumption of the existing CCS technology, its commercial application still faces economic problems. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/74C01B17/88C01B33/12C01F5/24C01B3/04
CPCC01B3/04C01B17/74C01B17/88C01B33/12C01F5/24Y02E60/36
Inventor 张彦威王智化周志军刘建忠周俊虎黄镇宇杨卫娟程军倪明江岑可法
Owner ZHEJIANG UNIV
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