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Method and device for preparing CO and H2 by thermochemical cycle decomposition of CO2 and H2O

A thermochemical cycle, CO2 technology, applied in the production of carbon monoxide and hydrogen, energy input, etc., can solve problems such as affecting the chemical reaction rate, and achieve the effect of large-scale industrial application, appropriate reaction temperature, and easy large-scale industrial application.

Active Publication Date: 2013-10-30
浙江百能科技有限公司
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  • Description
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Problems solved by technology

[0018] Weidenkaff et al. used thermogravimetric analysis to investigate the influence of the main parameters in the pyrolysis process of zinc oxide. They found that the decomposition rate of ZnO was directly proportional to the temperature and the mass flow rate of the inert carrier gas, but inversely proportional to the oxygen partial pressure in the carrier gas. , the surface chemical impurities will affect the chemical reaction rate to a certain extent

Method used

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  • Method and device for preparing CO and H2 by thermochemical cycle decomposition of CO2 and H2O

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Effect test

specific Embodiment 1

[0050] (1) Put 14molH 2 O, 1.5molI 2 And 1molSO 2 It is sent to Bunsen reaction device 1, and the reaction liquid is stirred uniformly by the motor device to ensure that it is evenly mixed. An autonomous exothermic reaction occurs at 20°C and 1 atm, resulting in a multi-water HI phase (HI x ) And H 2 SO 4 Phase solution, 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 the reaction is as follows:

[0051] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0052] (2) Separate the two solutions in Bunsen reaction device 1 in liquid phase separation device 2, H 2 SO 4 Phase in H 2 SO 4 Concentration device 5 enters concentrated H after concentration 2 SO 4 In the catalytic decomposition device 6, it is first decomposed into SO at 350℃ 3 And H 2 O, generated SO 3 Catalytic decomposition at 800℃ to generate SO 2 And O 2 , The final product O 2 Accompanying SO 2 And H 2 O is returned to Bunsen reaction...

specific Embodiment 2

[0061] (1) Put 15molH 2 O, 5molI 2 And 1molSO 2 It is sent to Bunsen reaction device 1, and the reaction liquid is stirred at a uniform speed by the motor device to ensure that it is evenly mixed. The autonomous exothermic reaction occurs at 70°C and 1.5 atm, resulting in a watery HI phase (HI x ) And H 2 SO 4 Phase solution, 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 the reaction is as follows:

[0062] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0063] (2) Separate the two solutions in Bunsen reaction device 1 in liquid phase separation device 2, H 2 SO 4 Phase in H 2 SO 4 Concentration device 5 enters concentrated H after concentration 2 SO 4 In the catalytic decomposition device 6, it is first decomposed into SO at 350℃ 3 And H 2 O, generated SO 3 Catalytic decomposition at 850℃ to generate SO 2 And O 2 , The final product O 2 Accompanying SO 2 And H 2 O is returned to Bunsen re...

specific Embodiment 3

[0072] (1) Put 16molH 2 O, 9molI 2 And 1molSO 2 It is sent to Bunsen reaction device 1, and the reaction liquid is stirred at a constant speed by the motor device to ensure that it is evenly mixed. The autonomous exothermic reaction occurs at 120°C and 2 atm, resulting in a watery HI phase (HI x ) And H 2 SO 4 Phase solution, 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 the reaction is as follows:

[0073] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0074] (2) Separate the two solutions in Bunsen reaction device 1 in liquid phase separation device 2, H 2 SO 4 Phase in H 2 SO 4 Concentration device 5 enters concentrated H after concentration 2 SO 4 In the catalytic decomposition device 6, it is first decomposed into SO at 350℃ 3 And H 2 O, generated SO 3 Catalytic decomposition at 900℃ to generate SO 2 And O 2 , The final product O 2 Accompanying SO 2 And H 2 O is returned to Bunsen rea...

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Abstract

The invention relates to a CO2 emission reduction technology and aims at providing a method and device for preparing CO and H2 by thermochemical cycle decomposition of CO2 and H2O. According to the method, H2O, I2 and SO2 are fed into a Bunsen reaction device to perform a spontaneous exothermic reaction; CO2 gas is introduced to a fixed bed or a fluidized bed reactor and performs an exothermic reaction with metal Zn or Ni; and products in various reaction process are recycled by various reaction devices and final products are H2, CO and O2. The highest heat source temperature of the device is lower (less than 900DEG C) and other various forms of heat sources such as solar energy and nuclear energy can be used; the negative influence caused by incomplete reaction of Zn and CO2 is reduced to a certain degree; and the reaction temperature is proper and the scale industrial application is easily realized.

Description

Technical field [0001] The invention relates to a new method and technological process for preparing carbon monoxide and hydrogen by decomposing carbon dioxide and water in a thermochemical cycle. Background technique [0002] Currently, CO 2 Emission issues are getting more and more attention from everyone, how to effectively reduce CO 2 Emissions have become an important political and economic issue in countries around the world. The United States, the United Kingdom, Germany and other countries have all studied and formulated CO 2 Emission system, Japan has accelerated the CO 2 Comprehensive utilization of research, it is planned to take 10 years to establish CO 2 An independent industrial system for chemical raw materials. Looking at CO now 2 On the one hand, the measures that can be taken to reduce emissions are emissions reduction and control increments: including adjusting the energy structure, using low-carbon energy, vigorously developing clean energy such as nuclear, hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/04C01B31/18C01B32/40
CPCY02E60/364Y02E60/36Y02P20/133
Inventor 周俊虎张彦威岑可法王智化刘建忠周志军黄镇宇杨卫娟程军
Owner 浙江百能科技有限公司
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