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Method for preparing synthetic gas through photo-thermal chemical circulation decomposition of carbon dioxide

A carbon dioxide, photothermal chemistry technology, applied in chemical instruments and methods, hydrogen/syngas production, inorganic chemistry, etc., can solve the problem of high decomposition reaction temperature, and achieve the effect of improving cycle conditions, reducing temperature, and simple and convenient operation

Active Publication Date: 2016-08-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the key problem of the two-step thermochemical cycle is that the decomposition reaction temperature in the first step is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh titanium dioxide powder with a particle size of less than 100nm, place it in a test tube, and add 2 / 3 of the test tube volume of deionized water to the test tube, wherein the mass ratio of titanium dioxide nanopowder to deionized water is 1:100 , and placed in an ultrasonic oscillator to vibrate evenly;

[0030] (2) Pour the mixed suspension obtained in step (1) into a quartz glass vessel, and place it in 110° C. for drying for 3 hours to obtain a uniform titanium dioxide film deposited on the bottom of the quartz vessel;

[0031] (3) At normal temperature and pressure (0-50°C, 0.1MPa), place the titanium dioxide metal oxide film prepared in step (2) in a closed cavity, and use a light source to irradiate and react for 0.5h;

[0032] TiO 2 →TiO 2-m +m / 2O 2 , m<2;

[0033] (4) Pass into the CO with water vapor in the cavity of the titanium dioxide metal oxide thin film after being illuminated in the step (3) is housed; 2 , heating the cavity to 300°C for r...

Embodiment 2

[0041] (1) Weigh titanium dioxide powder with a particle size of less than 100nm, place it in a test tube, and add 2 / 3 of the test tube volume of deionized water to the test tube, wherein the mass ratio of titanium dioxide nanopowder to deionized water is 1:100 , and placed in an ultrasonic oscillator to vibrate evenly;

[0042] (2) Pour the mixed suspension obtained in step (1) into a quartz glass vessel, and place it in 110° C. for drying for 3 hours to obtain a uniform titanium dioxide film deposited on the bottom of the quartz vessel;

[0043] (3) At normal temperature and pressure (0-50°C, 0.1MPa), place the titanium dioxide metal oxide film prepared in step (2) in a closed cavity, and use a light source to irradiate and react for 1 hour;

[0044] TiO 2 →TiO 2-m +m / 2O 2 , m<2;

[0045] (4) Pass into the CO with water vapor in the cavity of the titanium dioxide metal oxide thin film after being illuminated in the step (3) is housed; 2 , heating the chamber to 500°C fo...

Embodiment 3

[0053] (1) Weigh titanium dioxide powder with a particle size of less than 100nm, place it in a test tube, and add 2 / 3 of the test tube volume of deionized water to the test tube, wherein the mass ratio of titanium dioxide nanopowder to deionized water is 1:100 , and placed in an ultrasonic oscillator to vibrate evenly;

[0054] (2) Pour the mixed suspension obtained in step (1) into a quartz glass vessel, and place it in 110° C. for drying for 3 hours to obtain a uniform titanium dioxide film deposited on the bottom of the quartz vessel;

[0055] (3) At normal temperature and pressure (0-50°C, 0.1MPa), place the titanium dioxide metal oxide film prepared in step (2) in a closed cavity, and use a light source to irradiate and react for 2 hours;

[0056] TiO 2 →TiO 2-m +m / 2O 2 , m<2;

[0057] (4) Pass into the CO with water vapor in the cavity of the titanium dioxide metal oxide thin film after being illuminated in the step (3) is housed; 2 , heating the chamber to 600°C f...

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Abstract

The invention relates to the synthetic gas preparation technology, aims at providing a method for preparing synthetic gas through photo-thermal chemical circulation decomposition of carbon dioxide. The method includes the following steps: carrying out uniform ultrasonic vibration of a titanium dioxide nano powder and deionized water, pouring the obtained mixed suspension into a quartz glass ware, and drying; placing a prepared titanium dioxide thin film in a sealed cavity body, carrying out a reaction at normal temperature and pressure and by light source irradiation, then introducing CO2 with water vapor, heating the cavity body to 300 to 600 DEG C, carrying out a reaction, and finally, obtaining the synthetic gas including hydrogen, carbon monoxide and methane. Photochemistry and thermochemistry are combined together, so the temperature required for the first step of thermochemical circulation is greatly reduced, and the circulation conditions are improved; operations required to be carried out are simpler and more convenient, the highest heat source temperature is relatively low, and the heat sources of solar energy, nuclear energy and other forms are adopted. The method can produce methane having more use value, prepares CO and H2 and the like at the same time, and has the potential for synthesis of a variety of chemical raw materials.

Description

technical field [0001] The invention belongs to synthesis gas preparation technology, relates to the field of thermochemical cycle decomposition of carbon dioxide and water system, in particular to a method for preparing synthesis gas (including hydrogen, carbon monoxide and methane) by photothermochemical cycle decomposition of carbon dioxide and water. Background technique [0002] Syngas is H 2 It can be used as an intermediate in the petrochemical industry or through Fischer-Tropsch synthesis to prepare various high-quality liquid fuels and chemicals, such as hydrogen, methanol and dimethyl ether. Wait. At present, the vast majority of synthesis gas production processes still use coal gasification or natural gas gasification. With the increasing depletion of fossil energy and increasingly serious environmental problems, the development of synthesis gas production processes using renewable resources as raw materials will alleviate the world's energy. Shortages and envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/06
CPCC01B3/06C01B2203/062C01B2203/0805C01B2203/1041Y02E60/36Y02P20/133
Inventor 张彦威岑可法王智化周俊虎周志军刘建忠黄镇宇杨卫娟程军
Owner ZHEJIANG UNIV
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