Method for preparing calcium group carbonic anhydride adsorption agent

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...

AI Technical Summary

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

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