Method for fixing carbon dioxide in water-gas shift process through real-time carbonization of silicate

A water-gas shift and carbon dioxide technology, which is applied in the preparation of carbonate/acid carbonate, chemical instruments and methods, inorganic chemistry, etc. The effect of simple process and wide source of raw materials

Pending Publication Date: 2022-07-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, parsing the released CO 2 Rational storage and utilization of water has become another problem, and CO has not really been realized. 2 fixation and storage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Using natural anorthite as CO 2 CO during water-gas shift reaction with fixative 2 removal and H 2 Preparation, using the following steps:

[0025] 1) The natural anorthite fixative and catalyst are mixed and filled into the reactor with built-in fixed bed;

[0026] 2) Pour the mixed gas with a CO concentration of 34.7% and a water-to-gas ratio of 0.6 into the reactor, so that the mixed gas has a temperature of 538 °C, a pressure of 12.5 MPa, and a shift gas velocity of 2.6 m / s. react;

[0027] 3) After the reaction, the adsorbed anorthite and the catalyst are sieved and separated, and CO 2 The fixative is processed later, and the catalyst is reused.

[0028] CO treated by this method 2 Emission concentration ≤5%, the prepared H 2 The concentration reaches 96%.

Embodiment 2

[0030] Using natural olivine as CO 2 CO during water-gas shift reaction with fixative 2 removal and H 2 Preparation, using the following steps:

[0031] 1) The natural olivine fixative and catalyst are mixed and filled into the reactor with built-in fluidized bed;

[0032] 2) Pour the mixed gas with a CO concentration of 18.2% and a water-to-gas ratio of 0.4 into the reactor, so that the mixed gas has a temperature of 477 °C, a pressure of 8.90 MPa, and a shift gas velocity of 3.5 m / s. react;

[0033] 3) After the reaction, the saturated olivine and the catalyst are separated by gravity separation, CO 2 The fixative is processed later, and the catalyst is reused.

[0034] CO treated by this method 2 Emission concentration ≤4%, the prepared H 2 The concentration reaches 92%.

Embodiment 3

[0036] Using natural kaolinite as CO 2 CO during water-gas shift reaction with fixative 2 removal and H 2 Preparation, using the following steps:

[0037] 1) The natural kaolinite fixative and catalyst are mixed and filled into the reactor with built-in mixed bed;

[0038]2) Pour the mixed gas with a CO concentration of 37.3% and a water-to-gas ratio of 0.7 into the reactor, so that the mixed gas has a temperature of 590 °C, a pressure of 5.5 MPa, and a shift gas velocity of 4.1 m / s. react;

[0039] 3) After the reaction, the adsorbed saturated kaolinite and the catalyst are separated by magnetic separation, CO 2 The fixative is processed later, and the catalyst is reused.

[0040] CO treated by this method 2 Emission concentration ≤3%, the prepared H 2 The concentration reaches 95%.

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Abstract

The invention discloses a method for fixing carbon dioxide in a water-gas shift process by utilizing silicate through real-time carbonization. The method comprises the following steps: 1) mixing a silicate mineral carbon dioxide fixing agent and a catalyst, and filling a reactor with the mixture; 2) introducing a mixed gas of water vapor and carbon monoxide in a certain proportion into the reactor, and enabling the mixed gas to react under a water-gas shift condition; and 3) after the reaction is finished, separating the saturated silicate mineral carbon dioxide fixing agent from the catalyst, carrying out subsequent treatment on the carbon dioxide fixing agent, and recycling the catalyst. According to the method, natural silicate is used as a carbon dioxide fixing agent, and can be added into the reactor only by simple crushing and grinding means, so that the method has remarkable economic advantages. The carbonate generated by absorbing the carbon dioxide can be returned to the natural environment by means of discharging to the sea or geological sequestration and the like, so that the earth circulation of the carbon is realized, and the problems of secondary pollution, solid waste generation and the like are avoided.

Description

technical field [0001] The invention belongs to the field of carbon dioxide fixation, and in particular relates to a method for fixing carbon dioxide in a water-gas shift process by real-time carbonization of silicate. Background technique [0002] With the rapid advancement of industrialization, the exploitation and utilization of fossil energy has played an irreplaceable role. However, the huge emission of carbon dioxide caused by this has become the most urgent environmental problem facing the world today, and the dominant position of fossil energy in the energy consumption pattern will still be difficult to replace for a long time in the future. 2 emissions are bound to increase further. In order to slow down the aggravation of the "greenhouse effect", it is the main trend of future development to seek efficient preparation and utilization of clean energy. Hydrogen energy is considered to be one of the most promising energy sources due to its advantages of high combust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/16C01B32/60
CPCC01B3/16C01B32/60
Inventor 田森林李晨赵群谢明军宁平李英杰胡学伟黄建洪
Owner KUNMING UNIV OF SCI & TECH
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