Method for preparing calcium group carbonic anhydride adsorption agent

A calcium-based adsorbent and carbon dioxide technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of reduced capacity, reactor wear, increased fouling and corrosion, and increased operating costs, so as to reduce abrasion and improve Anti-sintering performance and the ability to capture CO2 cyclically, and the effect of reducing operating costs

Inactive Publication Date: 2008-09-24
SOUTHEAST UNIV
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Problems solved by technology

However, calcium-based adsorbents have an obvious deficiency in the cyclic calcination / carbonation reaction: that is, with the increase in the number of cyclic reactions, the carbonation performance is to capture CO 2 ability to rapidly decline
The circulation of a large amount of calcium-based adsorbent in the reactor not only increases the operating cost, but also increases the wear, fouling and corrosion of the reactor

Method used

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  • Method for preparing calcium group carbonic anhydride adsorption agent
  • Method for preparing calcium group carbonic anhydride adsorption agent
  • Method for preparing calcium group carbonic anhydride adsorption agent

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Embodiment Construction

[0015] figure 2 It is a process flow chart of using acetic acid wastewater to condition calcium-based adsorbents in the cyclic calcination / carbonation process. The calcium-based adsorbent enters the conditioning reaction tower and undergoes acidification reaction with the acetic acid wastewater. After conditioning, the adsorbent enters the dry distillation reaction tower for carbonization, recovers the acetone released by the conditioning adsorbent, and then undergoes calcination / carbonation reaction cycle capture CO 2 .

[0016] The specific operation method of using acetic acid wastewater to condition the calcium-based adsorbent is as follows: under normal temperature and pressure conditions, the acetic acid wastewater solution is placed in a container, and calcium-based adsorbent particles such as limestone, dolomite and calcium oxide are added to the acetic acid wastewater During the reaction, stir while adding, the molar ratio of acetic acid in the acetic acid wastewat...

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Abstract

The invention relates to a preparation method of a calcium-based sorbent of carbon dioxide, taking acetic acid waste water and the calcium-based sorbent as raw materials. The preparation method is as follows: under a condition of normal temperature and pressure, the acetic acid waste water is added in to a container, the calcium-based sorbent is added into the acetic acid waste water while stirring, the mol ratio between the acetic acid in the acetic acid waste water and the calcium in the calcium-based sorbent is over 1.5:1; stirring is kept in the reaction to ensure uniform reaction between the calcium-based sorbent and the acetic acid waste water, a reaction product in the container is dehydrated by heating; acetone is released by reaction product obtained from the calcium-based sorbent conditioned by the acetic acid waste water; and the acetone is recycled in a method of carbonization; and the left solid product is the calcium-based sorbent of the carbon dioxide. The method can be applied in the technique of large-scale removal of carbon dioxide by cyclic calcination and carbonation in the combustion or gasification of fossil fuel and biomass, besides, the acetone which is an important chemical raw material can be recycled from the acetic acid waste water.

Description

technical field [0001] The present invention relates to enhanced calcium-based sorbent cycle capture of CO 2 The performance method belongs to the technical field of environmental pollution prevention and clean coal combustion. Background technique [0002] Currently, CO 2 The global warming caused by the main greenhouse gases has been widely concerned by countries all over the world. According to data released by the United States in 2004, from 2000 to 2004 the global CO 2 Emissions levels are increasing by 3% per year - a rate that was 1990 to 1999 2 Nearly three times the rate of increase in emissions (1.1%). This will lead to the migration of vegetation and species extinction, the movement of climate zones, sea level rise and land submersion, changes in ocean currents and frequent occurrence of El Niño, etc. my country is CO 2 Large emitters, especially CO from coal-fired power stations 2 Emission control has reached the point of no delay. [0003] CO 2 There ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30
Inventor 赵长遂李英杰梁财陈晓平
Owner SOUTHEAST UNIV
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