thermochemical cycle mineralization co 2 Simultaneously decompose h 2 o make h 2 method and device

A thermochemical cycle, CO2 technology, applied in chemical instruments and methods, inorganic chemistry, hydrogen production, etc., can solve the problems of low economy and added value, achieve easy large-scale industrial application, appropriate reaction temperature, high theoretical The effect of thermal efficiency

Active Publication Date: 2020-02-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • thermochemical cycle mineralization co <sub>2</sub> Simultaneously decompose h <sub>2</sub> o make h <sub>2</sub> method and device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0038] (1) 14mol of H 2 O, 1.5mol of I 2 and 1mol of SO 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 20 ° C and 1 atm, producing 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:

[0039] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0040] The biphasic solution in the Bunsen reaction unit 1 is separated in the liquid phase separation unit 2;

[0041] (2) Under 120°C, 0.08atm and adiabatic conditions, in H 2 SO 4 The separated H in the concentration unit 4 2 SO 4 The phase solution is subjected to multi-stage sulfuric acid concentration treatment;

[0042] (3) Concentrated H 2 SO 4 phase into concentrated H 2 SO 4 In the cataly...

specific Embodiment 2

[0054] (1) 15molH 2 O, 5molI 2 and 1molSO 2 Send it into the Bunsen reaction device 1, stir the reaction solution at a uniform speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 70 ° C and 1.5 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:

[0055] I 2 +SO 2 +2H2 O→2HI+H 2 SO 4

[0056] The biphasic solution in the Bunsen reaction unit 1 is separated in the liquid phase separation unit 2;

[0057] (2) Under 190°C, 0.69atm and adiabatic conditions, in H 2 SO 4 The separated H in the concentration unit 4 2 SO 4 The phase solution is subjected to multi-stage sulfuric acid concentration treatment;

[0058] (3) Concentrated H 2 SO 4 phase into concentrated H 2 SO 4 In the catalytic decompos...

specific Embodiment 3

[0070] (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:

[0071] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0072] The biphasic solution in the Bunsen reaction unit 1 is separated in the liquid phase separation unit 2;

[0073] (2) Under 260°C, 1.3atm and adiabatic conditions, in H 2 SO 4 The separated H in the concentration unit 4 2 SO 4 The phase solution is subjected to multi-stage sulfuric acid concentration treatment;

[0074] (3) Concentrated H 2 SO 4 phase into concentrated H 2 SO 4 In the catalytic decomposit...

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Abstract

The invention relates to the field of CO2 discharging reduction and thermochemical hydrogen production, and aims to provide a method and device for preparing H2 by simultaneous thermochemical cycle mineralization of CO2 and decomposition of H2O. A Bunsen reaction device is connected with a liquid phase separation device; the liquid phase separation device is connected with a HIx concentration device and a H2SO4 concentration device respectively; the H2SO4 concentration device, a concentrated H2SO4 catalytic decomposition device and the Bunsen reaction device are connected in sequence; the HIxconcentration device is connected with the Bunsen reaction device and a MgI2 generation reactor; the MgI2 generation reactor is connected with a MgI2 distillation device; the MgI2 distillation deviceis connected with the Bunsen reaction device and a MgI2 hydrolytic carbonation reactor; the MgI2 hydrolysis carbonation reactor is connected with an HI catalytic decomposition reactor; and the HI catalytic decomposition reactor is then connected with the Bunsen reaction device. According to the device, a CO2 mineralization technology and thermochemical sulfur-iodine open-cycle water decompositionfor hydrogen production are organically combined creatively; CO2 is mineralized and fixed under a relatively mild reaction condition, and H2 with a high additional value is co-produced; and an HI-I2 rectification process in a traditional hydrogen production cycle is avoided, and higher heat efficiency is achieved.

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 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. And, CO 2 There may also...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/04C01F5/24
CPCC01B3/042C01F5/24Y02E60/36
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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